- stunnel-users - stunnel.org

certificate verify failed
by Roman Tuchyna 19 Jun '13

19 Jun '13

Hi All, I'm trying to create SSl tunnel between my server (Win 2008 R2, 4.56 version of stunnel) and remote application server - I have merged both root and sub certificate into 1 file and it looks like it can verify them and accept them as well, but then it tries to verify it at depth=0 and says certificate not found in local repository. Am I missing anything here ? (I modified messages to not disclose details of certificates in the debug below). Thank you! BR, Roman 2013.06.18 11:22:34 LOG7[272:2156]: Service [SZX] started 2013.06.18 11:22:34 LOG5[272:2156]: Service [SZX] accepted connection from 127.0.0.1:49397 2013.06.18 11:22:34 LOG6[272:2156]: connect_blocking: connecting 10.254.0.21:443 2013.06.18 11:22:34 LOG7[272:2156]: connect_blocking: s_poll_wait 10.254.0.21:443: waiting 10 seconds 2013.06.18 11:22:34 LOG5[272:2156]: connect_blocking: connected 10.254.0.21:443 2013.06.18 11:22:34 LOG5[272:2156]: Service [SZX] connected remote server from 192.168.20.23:49398 2013.06.18 11:22:34 LOG7[272:2156]: Remote socket (FD=396) initialized 2013.06.18 11:22:34 LOG7[272:2156]: SNI: sending servername: 10.254.0.21 2013.06.18 11:22:34 LOG7[272:2156]: SSL state (connect): before/connect initialization 2013.06.18 11:22:34 LOG7[272:2156]: SSL state (connect): SSLv3 write client hello A 2013.06.18 11:22:34 LOG7[272:2156]: SSL state (connect): SSLv3 read server hello A 2013.06.18 11:22:34 LOG7[272:2156]: Starting certificate verification: depth=2, /CN=xxx RootCA 2013.06.18 11:22:34 LOG5[272:2156]: Certificate accepted: depth=2, /CN=xxx RootCA 2013.06.18 11:22:34 LOG7[272:2156]: Starting certificate verification: depth=1, /CN=xxx 2013.06.18 11:22:34 LOG5[272:2156]: Certificate accepted: depth=1, /CN=xxx SubCA1 2013.06.18 11:22:34 LOG7[272:2156]: Starting certificate verification: depth=0, /C=zzz 2013.06.18 11:22:34 LOG4[272:2156]: CERT: Certificate not found in local repository 2013.06.18 11:22:34 LOG4[272:2156]: Certificate check failed: depth=0, /C=zzz 2013.06.18 11:22:34 LOG7[272:2156]: SSL alert (write): fatal: certificate unknown 2013.06.18 11:22:34 LOG3[272:2156]: SSL_connect: 14090086: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed 2013.06.18 11:22:34 LOG5[272:2156]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.06.18 11:22:34 LOG7[272:2156]: Remote socket (FD=396) closed 2013.06.18 11:22:34 LOG7[272:2156]: Local socket (FD=376) closed 2013.06.18 11:22:34 LOG7[272:2156]: Service [SZX] finished (0 left)

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stunnel RHEL 6.3 and HTTPS header fields
by xxxxxxxxxxxxxxxxx 16 Jun '13

16 Jun '13

I'm an Stunnel newbie so forgive me if this question has been asked previously. I am using stunnel to accept a connection from http://127.0.0.1:someport/url/to/wsdland connect to hostname.somewhere.abc:443 Everything is working fine with the exception of a certain endpoint that responds with an HTTP status code of 403 "forbidden". What I have determined is that the server is rejecting the request due to the HTTP "Host:" field value, it's set to 127.0.0.1. Is there anyway to pass the value of the config file "connect" property instead (in my case "hostname.somewhere")?I have tried various config settings without success. Config entry: [testnesiis]client = yesaccept = 127.0.0.1:1445connect = testnesiis:443;protocolHost = testnesiis:443protocol = proxy;sni = testnesiis;transparent = both Thanks and Kudos to the authors of stunnel !

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Certificate failure to verify with verify = 4 option
by Thomas Eifert 16 Jun '13

16 Jun '13

Greetings; Stunnel 4.56 running under Win 7 SP1 x86. Recently, the owners of a server I regularly connect to updated their server certificate; the former had expired at the end of May. As soon as that event occurred, I deleted the old certificate, then used the "save peer certificate" function of Stunnel to get the updated one. However, the new certificate fails to verify, even with the verify = 4 option in Stunnel. The error message is similar to what I used to get when doing a verify = 3 with some certificates. The general error output of Stunnel is: CERT: Verification error: unable to get local issuer certificate 2013.06.09 16:37:46 LOG4[608:2336]: Certificate check failed: depth=0 When I open the new certificate with: openssl x509 -text -in certname.pem and view the certificate details, I'm not seeing anything obvious. The certificate is within a valid date range, and contains the same basic elements as other certs I've viewed. The certificate appears to have been issued by Startcom LLC. If I comment out the verify statement, I'm able to successfully negotiate an SSL connection with the server. I realize that this may be more of an openssl issue than an issue with Stunnel. Nevertheless, I thought I'd start here and throw it out to the floor for comments. Anyone have any ideas or have run into this issue? Regards, Thomas -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

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tuning/multiple stunnel instance
by William Kwan 13 Jun '13

13 Jun '13

Dear all, I would like to find out if there's anyway to tune stunnel or what's the best practice you would recommend. I have a bit more than 100 sessions defined in stunnel.conf. It appears that clients started to see latency increase. Would you say 1. Split the conf file to multiple conf files and start multiple stunnel with each conf file? 2. Any way to tune stunnel to run muliple process with more threads? 3. Any other options? Thanks Will

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stunnel doesn't create tunnel
by Roman Tuchyna 13 Jun '13

13 Jun '13

Hi All, I'm trying to create SSL tunnel between my server and remote application server and according to log file, stunnel fails to 0.0.0.0:43 Service [SZR] (FD=716) bound to 0.0.0.0:443 (although connect and accept are configured for this service). I'm using stunnel on Windows and apparently I'm doing something wrong - any hint or advice would be appreciated. I was searching for the reason, but couldn't find any pointer... Thank you! BR, Roman 2013.06.13 16:25:19 LOG7[2884:3032]: Dispatching signals from the signal pipe 2013.06.13 16:25:19 LOG7[2884:3032]: Processing SIGNAL_RELOAD_CONFIG 2013.06.13 16:25:19 LOG5[2884:3032]: Reading configuration from file stunnel.conf 2013.06.13 16:25:19 LOG5[2884:3032]: FIPS mode is enabled 2013.06.13 16:25:19 LOG7[2884:3032]: Compression not enabled 2013.06.13 16:25:19 LOG7[2884:3032]: Snagged 64 random bytes from C:/.rnd 2013.06.13 16:25:19 LOG7[2884:3032]: Wrote 1024 new random bytes to C:/.rnd 2013.06.13 16:25:19 LOG7[2884:3032]: PRNG seeded successfully 2013.06.13 16:25:19 LOG6[2884:3032]: Initializing service [SZR] 2013.06.13 16:25:19 LOG7[2884:3032]: Loaded verify certificates from SZR.pem 2013.06.13 16:25:19 LOG7[2884:3032]: Loaded SZR.pem revocation lookup file 2013.06.13 16:25:19 LOG7[2884:3032]: SSL options set: 0x01000004 2013.06.13 16:25:19 LOG5[2884:3032]: Configuration successful 2013.06.13 16:25:19 LOG7[2884:3032]: Closing service [SZR] 2013.06.13 16:25:19 LOG7[2884:3032]: Service [SZR] closed (FD=716) 2013.06.13 16:25:19 LOG7[2884:3032]: Sessions cached before flush: 0 2013.06.13 16:25:19 LOG7[2884:3032]: Sessions cached after flush: 0 2013.06.13 16:25:19 LOG7[2884:3032]: Service [SZR] closed 2013.06.13 16:25:19 LOG7[2884:3032]: Service [SZR] (FD=716) bound to 0.0.0.0:443 2013.06.13 16:25:19 LOG7[2884:3032]: Signal pipe is empty

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Re: [stunnel-users] Getting Stunnel working with Verizon.net SMTP
by Gary Kuznitz 13 Jun '13

13 Jun '13

Hi Jochen, With your help I selected "Do not use CRAM-MD5 authentication even if it is advertised" It's now woking. Thank you very much for your help. Do you know if there is any way to remove the emails with the user name and password from the archives? Thanks, Gary On 12 Jun 2013 at 23:08, Jochen (Jochen Bern <Jochen.Bern(a)LINworks.de>) commented about Re: [stunnel-users] Getting Stunnel working with : > On 12.06.2013 21:28, Gary Kuznitz wrote: > > On your first post I didn't see the difference in port numbers. I have corrected that. > > I'm getting this log from my email client: > > --- Wed, 12 Jun 2013 12:22:46 --- > > Connect to 'localhost' port 10115, timeout 60. > > 12:22:46.960 [*] Connection established to 127.0.0.1 > > 12:22:47.226 >> 0120 220 vms173007pub.verizon.net -- Server ESMTP (Sun Java(tm) > > System Messaging Server 7u2-7.02 32bit (built Apr 16 2009))\0D\0A > > First and foremost, this shows that your e-mail client can now talk to > the server, which means that stunnel's job (the SSL negotiation) gets > done successfully. > > > 12:22:47.288 >> 0042 250-AUTH DIGEST-MD5 PLAIN LOGIN CRAM-MD5\0D\0A > > 12:22:47.288 >> 0022 250-AUTH=LOGIN PLAIN\0D\0A > > This part of the server's reply to the EHLO command shows the auth > mechanisms the server supports; CRAM-MD5 is listed ... > > > 12:22:47.288 << 0015 AUTH CRAM-MD5\0D\0A > > ... and your client requests it. > > > 12:22:47.335 >> 0050 334 PDEzNTYyOTY5MjEuMTIxMTA1NTFAdm1zMTczMDA3Pg==\0D\0A > > The servers issues (a base64 encoded version of) > "<1356296921.12110551@vms173007>" as a "random" string challenge. > > > 12:22:47.335 << 0058 YXR1cHJlcyBkYTlmZTI3MWFjODNjYWUxOTVjNmZhZWQ5ZGE0NTUzYg==\0D\0A > > This is a base64 encoded version of "atupres > da9fe271ac83cae195c6faed9da4553b". "atupres" should be your username and > da9fe271ac83cae195c6faed9da4553b the HMAC-MD5 digest of the challenge > with your password as the key. > > I don't know a tool to compute HMAC-MD5 digests that is readily > available under Windows, I'm afraid. If you're desperate, try > http://www.freeformatter.com/hmac-generator.html > (note that they won't know a) on which server and b) with what username > you'll be using the password ...). > > > 12:22:47.397 >> 0066 500 5.7.0 Unknown AUTH error -1 (Internal authentication error).\0D\0A > > ... and there the server says it cannot verify that. > > > Do you have any idea why I am getting [that]? > > I can think of several *possible* reasons, but ultimately, the server > doesn't tell us what exactly is wrong. > > 1. It may be that the server is announcing CRAM-MD5 auth though it > actually does *not* support it. (The DIGEST-MD5 and CRAM-MD5 mechs > require that the server *knows* the (plaintext) password, while for > PLAIN and LOGIN, storing only a hash of the password is enough, and > foils attackers who manage to steal a copy of the password database.) > Enforcing use of a different mechanism can probably be done through > your e-mail client's settings, but I'm afraid that it's usually > rather cryptic how exactly to do that ... > If you want to have a *manual* try at another mech, here's a web > page explaining what to input for PLAIN and LOGIN: > http://www.gadgetwiz.com/protocols/smtp-auth-example.html > and here's an MS KB article with a base64 en-/decoder: > http://support.microsoft.com/kb/191239 > Problem is that the strings to be base64 encoded are supposed *not* > to have an end-of-line, and sometimes even to contain NUL bytes > ("\0") ... Verify that your method of choice properly reproduces the > examples in the howto page. :-C > 2. I'm a bit surprised that your username supposedly is "atupres", > rather than "atupres(a)your.dom.ain", "atupres%your.dom.ain" or > something to that effect ... ? > 3. The obvious one, a mistyped password ... > > Regards, > J. Bern > -- > *NEU* - NEC IT-Infrastruktur-Produkte im <http://www.linworks-shop.de/>: > Server--Storage--Virtualisierung--Management SW--Passion for Performance > Jochen Bern, Systemingenieur --- LINworks GmbH <http://www.LINworks.de/> > Postfach 100121, 64201 Darmstadt | Robert-Koch-Str. 9, 64331 Weiterstadt > PGP (1024D/4096g) FP = D18B 41B1 16C0 11BA 7F8C DCF7 E1D5 FAF4 444E 1C27 > Tel. +49 6151 9067-231, Zentr. -0, Fax -299 - Amtsg. Darmstadt HRB 85202 > Unternehmenssitz Weiterstadt, Geschäftsführer Metin Dogan, Oliver Michel

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Re: [stunnel-users] Getting Stunnel working with Verizon.net SMTP
by Gary Kuznitz 12 Jun '13

12 Jun '13

Thank you very much for working with me on resolving this. On your first post I didn't see the difference in port numbers. I have corrected that. Thank you for catching it. It did get me closer to resolving the issue. I'm getting this log from my email client: --- Wed, 12 Jun 2013 12:22:46 --- Connect to 'localhost' port 10115, timeout 60. 12:22:46.960 [*] Connection established to 127.0.0.1 12:22:47.226 >> 0120 220 vms173007pub.verizon.net -- Server ESMTP (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009))\0D\0A 12:22:47.226 << 0023 EHLO [192.168.168.11]\0D\0A 12:22:47.288 >> 0030 250-vms173007pub.verizon.net\0D\0A 12:22:47.288 >> 0014 250-8BITMIME\0D\0A 12:22:47.288 >> 0016 250-PIPELINING\0D\0A 12:22:47.288 >> 0014 250-CHUNKING\0D\0A 12:22:47.288 >> 0009 250-DSN\0D\0A 12:22:47.288 >> 0025 250-ENHANCEDSTATUSCODES\0D\0A 12:22:47.288 >> 0010 250-HELP\0D\0A 12:22:47.288 >> 0044 250-XLOOP AD6DF29B04183351BAD9935B9A483ABE\0D\0A 12:22:47.288 >> 0042 250-AUTH DIGEST-MD5 PLAIN LOGIN CRAM-MD5\0D\0A 12:22:47.288 >> 0022 250-AUTH=LOGIN PLAIN\0D\0A 12:22:47.288 >> 0010 250-ETRN\0D\0A 12:22:47.288 >> 0019 250-NO-SOLICITING\0D\0A 12:22:47.288 >> 0019 250 SIZE 20971520\0D\0A 12:22:47.288 << 0015 AUTH CRAM-MD5\0D\0A 12:22:47.335 >> 0050 334 PDEzNTYyOTY5MjEuMTIxMTA1NTFAdm1zMTczMDA3Pg==\0D\0A 12:22:47.335 << 0058 YXR1cHJlcyBkYTlmZTI3MWFjODNjYWUxOTVjNmZhZWQ5ZGE0NTUzYg==\0D\0A 12:22:47.397 >> 0066 500 5.7.0 Unknown AUTH error -1 (Internal authentication error).\0D\0A 12:22:50.845 << 0006 QUIT\0D\0A 12:22:50.892 >> 0034 221 2.3.0 Bye received. Goodbye.\0D\0A 12:22:50.892 --- Connection closed normally at Wed, 12 Jun 2013 12:22:50. ---\0A\0A I'm getting this in the Stunnel.log 2013.06.12 12:22:46 LOG7[660:2460]: New thread created 2013.06.12 12:22:46 LOG7[660:896]: Service [Verizon-smtp] started 2013.06.12 12:22:46 LOG5[660:896]: Service [Verizon-smtp] accepted connection from 127.0.0.1:52721 2013.06.12 12:22:46 LOG6[660:896]: connect_blocking: connecting 206.46.232.12:465 2013.06.12 12:22:46 LOG7[660:896]: connect_blocking: s_poll_wait 206.46.232.12:465: waiting 10 seconds 2013.06.12 12:22:46 LOG5[660:896]: connect_blocking: connected 206.46.232.12:465 2013.06.12 12:22:46 LOG5[660:896]: Service [Verizon-smtp] connected remote server from 192.168.168.11:52722 2013.06.12 12:22:46 LOG7[660:896]: Remote socket (FD=384) initialized 2013.06.12 12:22:46 LOG7[660:896]: SNI: sending servername: outgoing.verizon.net 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): before/connect initialization 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 write client hello A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 read server hello A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 read server certificate A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 read server key exchange A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 read server done A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 write client key exchange A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 write change cipher spec A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 write finished A 2013.06.12 12:22:46 LOG7[660:896]: SSL state (connect): SSLv3 flush data 2013.06.12 12:22:47 LOG7[660:896]: SSL state (connect): SSLv3 read finished A 2013.06.12 12:22:47 LOG7[660:896]: 2 items in the session cache 2013.06.12 12:22:47 LOG7[660:896]: 2 client connects (SSL_connect()) 2013.06.12 12:22:47 LOG7[660:896]: 2 client connects that finished 2013.06.12 12:22:47 LOG7[660:896]: 0 client renegotiations requested 2013.06.12 12:22:47 LOG7[660:896]: 0 server connects (SSL_accept()) 2013.06.12 12:22:47 LOG7[660:896]: 0 server connects that finished 2013.06.12 12:22:47 LOG7[660:896]: 0 server renegotiations requested 2013.06.12 12:22:47 LOG7[660:896]: 0 session cache hits 2013.06.12 12:22:47 LOG7[660:896]: 0 external session cache hits 2013.06.12 12:22:47 LOG7[660:896]: 0 session cache misses 2013.06.12 12:22:47 LOG7[660:896]: 0 session cache timeouts 2013.06.12 12:22:47 LOG6[660:896]: SSL connected: new session negotiated 2013.06.12 12:22:47 LOG6[660:896]: Negotiated TLSv1/SSLv3 ciphersuite: DHE-RSA-AES256-SHA (256-bit encryption) 2013.06.12 12:22:47 LOG6[660:896]: Compression: null, expansion: null 2013.06.12 12:22:50 LOG6[660:896]: Read socket closed (readsocket) 2013.06.12 12:22:50 LOG7[660:896]: Sending close_notify alert 2013.06.12 12:22:50 LOG7[660:896]: SSL alert (write): warning: close notify 2013.06.12 12:22:50 LOG6[660:896]: SSL_shutdown successfully sent close_notify alert 2013.06.12 12:22:50 LOG7[660:896]: SSL alert (read): warning: close notify 2013.06.12 12:22:50 LOG6[660:896]: SSL closed (SSL_read) 2013.06.12 12:22:50 LOG7[660:896]: Sent socket write shutdown 2013.06.12 12:22:50 LOG5[660:896]: Connection closed: 102 byte(s) sent to SSL, 544 byte(s) sent to socket 2013.06.12 12:22:50 LOG7[660:896]: Remote socket (FD=384) closed 2013.06.12 12:22:50 LOG7[660:896]: Local socket (FD=216) closed 2013.06.12 12:22:50 LOG7[660:896]: Service [Verizon-smtp] finished (0 left) Do you have any idea why I am getting: 12:22:47.397 >> 0066 500 5.7.0 Unknown AUTH error -1 (Internal authentication error).\0D\0A Thank you, Gary On 12 Jun 2013 at 20:36, Jochen (Jochen Bern <Jochen.Bern(a)LINworks.de>) commented about Re: [stunnel-users] Getting Stunnel working with : > On 12.06.2013 19:48, Gary Kuznitz wrote: > > Thanks for showing me how to test SSL. I installed openssl and ran the test. This is > > what I received back. > > > > C:\Programs\OpenSSL-Win32\bin>openssl s_client -connect smtp.verizon.net:465 > [...] > > Verify return code: 19 (self signed certificate in certificate chain) > > --- > > At this point, the SSL layer of the connection has been set up (s_client > ignores the non-null verification result) and the actual payload > protocol can start to do its thing. The payload protocol is SMTP, so the > server throws you a hello line: > > > 220 vms173025pub.verizon.net -- Server ESMTP (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009)) > > and then waits for the client to send its requests. Since you apparently > didn't enter anything, the server obviously terminated the connection with: > > > 421 4.4.2 Timeout while waiting for command. > > An actual SMTP session with an *attempt* at transferring an e-mail would > look like, e.g.: > > > 220 vms173023pub.verizon.net -- Server ESMTP (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009)) > > HELO this.is.my.laptop > > 250 vms173023pub.verizon.net OK, [unknown] [213.157.4.156]. > > MAIL FROM:<Jochen.Bern(a)LINworks.de> > > 550 5.7.1 Authentication Required > > rSET > > 250 2.5.0 Ok. > > QUIT > > (The lines starting with a three-digit SMTP status code number are sent > by the server; the 5xx code signals a permanent error; the lines > starting with a four-letter SMTP command are sent by the client, i.e., I > typed them into the s_client; and I typed "rSET" instead of the normal > "RSET" because s_client takes every line starting with an *uppercase* > 'R' as a command to do an SSL renegotiation.) > > > It sounds like something is wrong on this end. Any ideas? > > What about the two *****DIFFERING***** port numbers I pointed out in > your posted data? > > >> On 12.06.2013 05:12, Gary Kuznitz wrote: > >>> [Verizon-smtp] > >>> client = yes > >>> accept = 11015 > >> ^##^^ > >> [...] > >>> --- Tue, 11 Jun 2013 16:38:55 --- > >>> Connect to 'localhost' port 10115, timeout 60. > >> ^##^^ > > I don't actually use stunnel (subscribed to the list when I had a need > that I later fulfilled with socat, but that's Unix/Linux only), so I > don't know whether stunnel has a problem with the self-signed cert ... > > Regards, > J. Bern > -- > *NEU* - NEC IT-Infrastruktur-Produkte im <http://www.linworks-shop.de/>: > Server--Storage--Virtualisierung--Management SW--Passion for Performance > Jochen Bern, Systemingenieur --- LINworks GmbH <http://www.LINworks.de/> > Postfach 100121, 64201 Darmstadt | Robert-Koch-Str. 9, 64331 Weiterstadt > PGP (1024D/4096g) FP = D18B 41B1 16C0 11BA 7F8C DCF7 E1D5 FAF4 444E 1C27 > Tel. +49 6151 9067-231, Zentr. -0, Fax -299 - Amtsg. Darmstadt HRB 85202 > Unternehmenssitz Weiterstadt, Geschäftsführer Metin Dogan, Oliver Michel

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Getting Stunnel working with Verizon.net SMTP
by Gary Kuznitz 12 Jun '13

12 Jun '13

I can't seem to connect with email at Verizon.net SMTP. I can connect with POP3. The Stunnel.log shows: 2013.06.11 19:27:04 LOG5[3752:2524]: stunnel 4.56 on x86-pc-msvc-1500 platform 2013.06.11 19:27:04 LOG5[3752:2524]: Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 2013.06.11 19:27:04 LOG5[3752:2524]: Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS 2013.06.11 19:27:04 LOG5[3752:2524]: Reading configuration from file stunnel.conf 2013.06.11 19:27:04 LOG5[3752:2524]: FIPS mode is enabled 2013.06.11 19:27:04 LOG5[3752:2524]: Configuration successful I have IPv6 turned off in my network settings. The Stunnel.conf looks like this: output = stunnel.log cert = stunnel.pem options = NO_SSLv2 [Verizon-pop3] client = yes accept = 11014 connect = pop.verizon.net:995 delay = yes [Verizon-smtp] client = yes accept = 11015 connect = smtp.verizon.net:465 delay = yes I do not have SSL turned on in my email client. The log from my email client looks like this: --- Tue, 11 Jun 2013 16:38:55 --- Connect to 'localhost' port 10115, timeout 60. 16:38:56.897 15: Peer connect failure (the host has refused the connection). The Verizon account is FIOS. I am not connected directly to the Verizon ISP. I can't send email without SSL. Does anyone have any idea how I can get this working? Thanks, Gary Kuznitz

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Certificate failure to verify with verify = 4 option
by Thomas Eifert 10 Jun '13

10 Jun '13

Correction: The cert issuer is Startcom Ltd, not Startcom LLC. -- Greetings; Stunnel 4.56 running under Win 7 SP1 x86. Recently, the owners of a server I regularly connect to updated their server certificate; the former had expired at the end of May. As soon as that event occurred, I deleted the old certificate, then used the "save peer certificate" function of Stunnel to get the updated one. However, the new certificate fails to verify, even with the verify = 4 option in Stunnel. The error message is similar to what I used to get when doing a verify = 3 with some certificates. The general error output of Stunnel is: CERT: Verification error: unable to get local issuer certificate 2013.06.09 16:37:46 LOG4[608:2336]: Certificate check failed: depth=0 When I open the new certificate with: openssl x509 -text -in certname.pem and view the certificate details, I'm not seeing anything obvious. The certificate is within a valid date range, and contains the same basic elements as other certs I've viewed. The certificate appears to have been issued by Startcom LLC. If I comment out the verify statement, I'm able to successfully negotiate an SSL connection with the server. I realize that this may be more of an openssl issue than an issue with Stunnel. Nevertheless, I thought I'd start here and throw it out to the floor for comments. Anyone have any ideas or have run into this issue? Regards, Thomas -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately. _______________________________________________ stunnel-users mailing list stunnel-users(a)stunnel.org https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

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weird stunnel problem
by Stephen Griffin 03 Jun '13

03 Jun '13

Hello A few days ago we ran into issue where the number of stunnel threads sky rocketed to over 3000 open stunnel threads. When this happen connections to our website slowed down considerably or failed to connect. It was resolved by flipping to our other proxy which accepted any new connections. It took about 5 minutes for the threads to die off on the other proxy. I was wondering if anyone has come across this problem? Here are some details of our stunnel version and config. Stunnel 4.44 with patch for x-forwarder [root@brm-proxy01 ~]# stunnel -version stunnel 4.44 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.0-fips 29 Mar 2010 Threading:PTHREAD SSL:ENGINE Auth:LIBWRAP Sockets:POLL,IPv6 Global options: debug = daemon.notice pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options: ciphers = ALL:!SSLv2:!aNULL:!EXP:!LOW:-MEDIUM:RC4:+HIGH curve = prime256v1 session = 300 seconds sslVersion = TLSv1 for client, all for server stack = 65536 bytes TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none appriacated Our stunnel.conf. /etc/stunnel/stunnel.conf #sslVersion = TLSv1 pid = /var/run/stunnel.pid syslog = yes output = /var/log/stunnel.log debug = 3 [https] cert = /etc/stunnel/ssl/wildcard.blah.com.pem accept = 443 connect = 80 xforwardedfor = yes TIMEOUTbusy = 300 TIMEOUTclose = 0 TIMEOUTconnect = 10 TIMEOUTidle = 60 Is there anything we could add for performance tuning in stunnel? Any suggestions on what I could look for when this happens again would be appreciated. Our platform does between 2000 to 3000 rpm (request per minute) during peak hours. We constantly see a lot of these messages every hour but I am not sure what is happening as the connections seem to be working. SSL_accept: Peer suddenly disconnected There was a higher spike of them as per the normal rate during our incident described above. Thanks Stephen Griffin Sr. System Administrator www.achievers.com<http://www.achievers.com/> Confidentiality: The information contained in this e-mail and any attachments are confidential. If you are not the intended recipient, you may not copy or distribute this information. If you have received this communication in error, please notify the sender immediately and delete it from your system.

1 0

x-forwarded-for.patch for stunnel 4.55/4.56
by Shannon Carver 17 May '13

17 May '13

Hi all, Just wondering if anyone know's a an xforwardedfor patch available for the latest versions of stunnel? Thanks Shannon Carver

2 1

Strange Stunnel crash (no errors, issues, anything)
by Alfred Kernaghan 17 May '13

17 May '13

Hi, Long time lurker, new poster though! I've got two servers running Stunnel v2.54 (yet to upgrade as I've been waiting for an x-forwardfor patch to become available). I noticed recently that one Stunnel nodes had exited, requiring a restart. I'm not sure if it's a co-incidence, but I've only just changed the cert on both installs last night. This, of course, is very concerning as it's only just become a problem, but being the core SSL endpoint, it knocks our server offline until it's restarted. Now comes the interesting bit, I've run the SSL Labs SSL Health check at https://www.ssllabs.com/ssltest/ just to see if anything comes out of it, and noticed that without fail every time it runs (and the first server is online) it'll know Stunnel offline as it goes through it's tests: *"Testing TLS v1.0...." "Testing TLS v1.2...."* *-- SERVER OFFLINE --* This was noticed by a fluke, but appears to happen every time I restart and then rerun the test. I'm not getting any segfaults, or errors from stunnel, and it only affects the one (primary) server. Can anyone shed any light as to what might be causing it, how I can get any more info out of stunnel, or better yet, fix it completely? Thanks all Alfie

2 2

Error with stunnel 4.56 on Ubuntu 12
by Laura Fried 12 May '13

12 May '13

I am getting a success with doing the configure, make and make install. However when I go to start up stunnel I get the following error message: Clients allowed=500 stunnel 4.56 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.1 14 Mar 2012 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file /usr/local/etc/stunnel/stunnel.conf FIPS_mode_set: F06D065: error:0F06D065:common libcrypto routines:FIPS_mode_set:fips mode not supported Line 51: "[pop3s]": Failed to initialize SSL str_stats: 9 block(s), 163 data byte(s), 522 control byte(s) Any assistance would be greatly appreciated. -- Laura J. Fried

1 0

4.53 32-bit on Windows 2k8 R2 64bit
by Michael Curran 01 May '13

01 May '13

We are running stunnel and noticed an issue with what ended up being an issue creating a new thread due to running out of memory at 2gb - error (8) on create_client Are there any known issues with 4.53 around memory usage? We only terminate 2 ports against the installation 443 on 2 different interfaces / IP addresses and we ran into this issue with just under 5000 total connections We are not doing ECDH , but are using a 1024-bit param file

2 3

Problem with roundrobbin failover mode?
by Matt Wise 01 May '13

01 May '13

I've got dozens of clients connecting with Stunnel to a group of 5 servers. Each system has a config that looks like this: > cert = /etc/stunnel/zookeeper.pem > key = /etc/stunnel/zookeeper.key > CAfile = /etc/stunnel/zookeeper_ca.pem > verify = 2 > delay = yes > sslVersion = TLSv1 > client = yes > setuid = stunnel4 > setgid = stunnel4 > pid = /var/lib/stunnel4/zookeeper.stunnel4.pid > socket = l:TCP_NODELAY=1 > socket = r:TCP_NODELAY=1 > TIMEOUTconnect = 2 > session = 86400 > debug = 5 > [zookeeper] > accept = 127.0.0.1:2182 > failover = rr > connect = prod-zookeeper:2182 > connect = prod-zookeeper-1:2182 > connect = prod-zookeeper-2:2182 > connect = prod-zookeeper-3:2182 > connect = prod-zookeeper-4:2182 > connect = prod-zookeeper-5:2182 Essentially the first host is a load balancer, and the next 5 are the actual zookeeper hosts so that we can bypass the ELB if its giving us fits. Now what we're seeing is that almost every connection ends up on prod-zookeeper-5. Over and over and over again, our hosts pick the same system each time. We're running Stunnel 4.52: > Clients allowed=8000 > stunnel 4.52 on i486-pc-linux-gnu platform > Compiled/running with OpenSSL 0.9.8k 25 Mar 2009 > Threading:PTHREAD SSL:ENGINE Auth:LIBWRAP Sockets:POLL,IPv6 Any ideas what might be wrong here? Obviously we want the connections to be *roughly* random across the list of hosts... and if one of the hosts goes down, and the connection fails, we want the stunnel service to try again, and randomly pick a new host. It doesn't really seem to be doing that though. --Matt

3 8

help on Linux stunnel setup
by Valerio.FABRIZIO＠sungard.com 26 Apr '13

26 Apr '13

Hello all! I'm in charge of activating stunnel to connect a service to a remote service. Since I'm totally new on this product, I'd be grateful if someone could help me in configuring. This is where I stand: Stunnel version: stunnel 4.29 on x86_64-unknown-linux-gnu with OpenSSL 1.0.0-fips 29 Mar 2010 OS: Linux 2.6.32-220.23.1.el6.x86_64 #1 SMP Mon Jun 18 18:58:52 BST 2012 x86_64 x86_64 x86_64 GNU/Linux I'd need to have it started by non-root user, and I have loaded under a specific path (owned by the same user): Stunnel.conf: ; Sample stunnel configuration file ;cert = FXMS1.pem client = yes output = /export/home/bg_mtsbv/slev5fix/log pid = /export/home/bg_mtsbv/slev5fix/conf/stunnel.pid [ssl01] accept = 127.0.0.1:18889 connect = 193.203.229.143:443 Stunnel.pid (empty) xxx.pem (certificate has been provided by the owner of the target server) my first two questions: which is the correct command line to be launched? Is it correct to have all the files under the user's directory? Many thanks in advance for your help! Regards, Valerio

1 0

Inconsistent performance across stunnel and/or OpenSSL versions
by PPingPongBaker PPingPongBaker 23 Apr '13

23 Apr '13

Hi All, I am experimenting with stunnel inside a VM on Xenserver 6.02. So this may not be a "common" use case, nonetheless, I would like to point out the issue. It is a basic setup as follows with 3 VMs running "ab" for webclient, stunnel+haproxy combo as the https/http bridge and nginx as the webserver. client VM (ab) <-> stunnel + haproxy VM <-> webserver VM (nginx) Specs on the stunnel VM are 2GB RAM, single-core dedicated 2.5 GHz Xeon E5-2640 vCPU, running Debian Squeeze 2.6.32-5-amd64 (64 bit) kernel. All things unchanged such as stunnel/haproxy/nginx config and taking care of common gotchas such as file descriptor limit, TIMEOUTclose, disabling libwrap, etc. stunnel is built with pthreads. Also stunnel is configured to use a 2K RSA self-signed certificate, and the client is being forced to do TLS1. "ab" is invoked with "-c 4" so as to peg the stunnel VM CPU (any value beyond 4 doesn't seem to matter). nginx serves a tiny 32 byte static html file. With stunnel 4.29 and OpenSSL 0.9.8o, I get 300 requests per second as max throughput. With stunnel 4.56 and OpenSSL 1.0.1e, I get only 40 requests per second as max throughput. tcpdump tells me that the Server Hello sent to the client takes a longer time in the latter case. Tinkering with TCP_NODELAY doesn't change anything. Anyone else seeing this maybe even on physical hardware? Has anything changed in OpenSSL across those versions? Suggestions? Thanks.

4 10

Windows Failover Clustering Support
by Cynthia Haselton 22 Apr '13

22 Apr '13

All, A (hopefully) quick question: Is stunnel supported on Windows Failover Clusters...specifically as a clustered service or to encrypt connections to/from a clustered IP? Thanks in advance, CJH

2 4

Customizing encryption
by John 19 Apr '13

19 Apr '13

HI guys, I need to take off SSL and use another encryption, need some hints since i'm new to stunnel. Thanks in advance,John

1 0

limited number of ports
by Terren Suydam 09 Apr '13

09 Apr '13

Hi, There appears to be a limit to the number of services you can define. Services beyond the 64th service appear to get set up without any log warnings or errors, yet don't pass traffic. The code uses select() & FD_SET to accept() an incoming connection & in Windows (using Windows Server 2008) the default is 64 sockets for that so wondering if I can just recompile, setting FD_SETSIZE to something larger. I'll try it either way, just wanted to put it out there to see if anyone else has ever run into this. Thanks, Terren

4 10

Trying to Upgrade stunnel, but compile isn't working?
by Michael D. Setzer II 03 Apr '13

03 Apr '13

I have been using stunnel for a long time, but was just trying to compile the latest version from source, and it compiles, but doesn't work like the older version, so I must have some option wrong. With the current version on my Fedora 14 machine using the latest version it loads the stunnel ports and works, but the newer version does seem to load or give an error message. I've tested the stunnel from Fedora 16 and Fedora 17, and they work fine with the stunnel.conf to load the settings. Current version info from Fedora 14 system. stunnel 4.34 on x86_64-redhat-linux-gnu with OpenSSL 1.0.0e-fips 6 Sep 2011 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = daemon.notice pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!aNULL:!eNULL:!SSLv2 curve = sect163r2 session = 300 seconds stack = 65536 bytes sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none The new build does this. stunnel 4.56 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.0e-fips 6 Sep 2011 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Global options: debug = daemon.notice pid = /usr/local/var/run/stunnel/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options: ciphers = FIPS (with "fips = yes") ciphers = ALL:!SSLv2:!aNULL:!EXP:!LOW:-MEDIUM:RC4:+HIGH (with "fips = no") sessionCacheSize = 1000 sessionCacheTimeout = 300 seconds sslVersion = TLSv1 (with "fips = yes") sslVersion = TLSv1 for client, all for server (with "fips = no") stack = 65536 bytes TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none Have also tried it with --disable-fips With the new version I have to provide the /etc/stunnel/stunnel.conf, but it doesn't load any of the options. Sure it is just a simple configure setting I am missing. Thanks. +----------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor Guam Community College Computer Center mailto:[email protected] mailto:[email protected] http://www.guam.net/home/mikes Guam - Where America's Day Begins G4L Disk Imaging Project maintainer http://sourceforge.net/projects/g4l/ +----------------------------------------------------------+ http://setiathome.berkeley.edu (Original) Number of Seti Units Returned: 19,471 Processing time: 32 years, 290 days, 12 hours, 58 minutes (Total Hours: 287,489) BOINC@HOME CREDITS SETI 14305761.074364 | EINSTEIN 10610832.119852 ROSETTA 6726167.419674 | ABC 15903532.519753

2 2

Log Rotation on Windows
by Brian Wilkins 03 Apr '13

03 Apr '13

I know that log rotation on Windows is on the TO-DO list. Is there a way to rotate the log at startup using some other means or during use? I suppose I could start stunnel with a batch file and do the log rotation before starting. Is there any other way? Brian

1 0

32/64 bit interposition on Solaris
by Norm Jacobs 29 Mar '13

29 Mar '13

I was recently working with stunnel on Solaris and ran across the following code in client.c: putenv("LD_PRELOAD=" LIBDIR "/libstunnel.so"); This appears to have been put in place to interpose a stunnel version of getpeername() on the downstream application. This works great when libstunnel.so has the same bittedness as the downstream application, but Solaris allows users to install and run both 32 and 64 bit applications on the same system. If the stunnel exectuable is a 32 bit application and the downstream application is a 64 bit application, the runtime linker falls over because of the mismatch with the interposed library. To avoid this problem, stunnel should use LD_PRELOAD_32 and LD_PRELOAD_64 on Solaris. I have put together a patch to client.c that sets both LD_PRELOAD_* environment variables to something that seems to make sense on Solaris, but have used a fairly hacky way of enabling it when I build. The client.c changes that I put together are: # On Solaris, fix stunnel so that the linker know where both the 32 and 64 bit # interposer libraries are. If you use LD_PRELOAD with the wrong bittedness # of interposer, the runtime linker hits a fatal error in trying to load # mismatched ELF objects. # diff -r -u stunnel-4.55.orig/src/client.c stunnel-4.55/src/client.c --- stunnel-4.55.orig/src/client.c 2013-02-28 00:17:58.000000000 -0800 +++ stunnel-4.55/src/client.c 2013-03-21 22:55:21.098479331 -0700 @@ -1096,9 +1096,14 @@ /* just don't set these variables if getnameinfo() fails */ putenv(str_printf("REMOTE_HOST=%s", host)); if(c->opt->option.transparent_src) { - putenv("LD_PRELOAD=" LIBDIR "/libstunnel.so"); - /* for Tru64 _RLD_LIST is used instead */ +#ifdef MACH64 + putenv("LD_PRELOAD_32=" LIBDIR "/libstunnel.so"); + putenv("LD_PRELOAD_64=" LIBDIR "/" MACH64 "/libstunnel.so"); +#elif __osf /* for Tru64 _RLD_LIST is used instead */ putenv("_RLD_LIST=" LIBDIR "/libstunnel.so:DEFAULT"); +#else + putenv("LD_PRELOAD=" LIBDIR "/libstunnel.so"); +#endif } } This adds more appropriate environment variables into the calling environment on Solaris. It still needs some work to integrate better with the build. Anyway, I thought that I would raise the issue and at least offer a direction to work from. I am happy to work with someone on a better resolution to this. -Norm

1 0

use of CRYPTO_NUM_LOCKS
by Norm Jacobs 29 Mar '13

29 Mar '13

A while ago, the Solaris security group noticed that stunnel uses CRYPTO_NUM_LOCKS to size a lock table in the code at compile time. They noted that there is function CRYPTO_num_locks() that can do the same thing at runtime and have requested that the function be used so that FIPS/non-FIPS support can be switched on by users simply using interposition. As a result of this, I put together this patch that switches to code to use the function instead of macro. -Norm # stunnel should use CRYPTO_num_locks() function instead of CRYPTO_NUM_LOCKS # macro. The function interogates libcrypto at run-time for sizing and the # macro at compile time. If you interpose a a version at runtime to switch # between FIPS/non-FIPS support, the lock table may not be sized correctly. # diff -r -u stunnel-4.55.orig/src/sthreads.c stunnel-4.55/src/sthreads.c --- stunnel-4.55.orig/src/sthreads.c 2012-08-09 14:44:18.000000000 -0700 +++ stunnel-4.55/src/sthreads.c 2013-03-21 23:29:34.912001586 -0700 @@ -212,7 +212,7 @@ #ifdef USE_PTHREAD static pthread_mutex_t stunnel_cs[CRIT_SECTIONS]; -static pthread_mutex_t lock_cs[CRYPTO_NUM_LOCKS]; +static pthread_mutex_t *lock_cs; void enter_critical_section(SECTION_CODE i) { pthread_mutex_lock(stunnel_cs+i); @@ -275,13 +275,15 @@ int sthreads_init(void) { int i; + int num_locks = CRYPTO_num_locks(); /* initialize stunnel critical sections */ for(i=0; i<CRIT_SECTIONS; i++) pthread_mutex_init(stunnel_cs+i, NULL); /* initialize OpenSSL locking callback */ - for(i=0; i<CRYPTO_NUM_LOCKS; i++) + lock_cs = calloc(num_locks, sizeof (*lock_cs)); + for(i=0; i<num_locks; i++) pthread_mutex_init(lock_cs+i, NULL); CRYPTO_set_id_callback(stunnel_thread_id); CRYPTO_set_locking_callback(locking_callback);

1 0

SSL VPN configuration confusion
by TJ 28 Mar '13

28 Mar '13

I'm using stunnel v4.56 on Linux (Ubuntu) and trying to configure a routed tunnel in conjunction with pppd. I could do with some help to figure it out - my biggest problem is not knowing what a good connection configuration or log looks like. I've read lots of (old) patchy articles on how it is done but the instructions are either hopelessly out of date, or plain wrong. During extensive trial and error I found what appeared to be bugs in the Ubuntu distro-packaged v4.42 but as I don't yet know what a successful connection log looks like they may have been red herrings. The main issue I was trying to build out of was (on the server): SSL accepted: new session negotiated Negotiated ciphers: ECDHE-RSA-RC4-SHA SSLv3 Kx=ECDH Au=RSA Enc=RC4(128) Mac=SHA1 TTY=/dev/pts/4 allocated Local mode child started (PID=17247) Remote FD=1 initialized TCP_NODELAY: Socket operation on non-socket (88) Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket linger (remote): Socket operation on non-socket (88) Service vpn finished (0 left) At this point there would be no pppX interfaces. I created an up-to-date Debian/Ubuntu package for v4.56 which has been more successful. Both ends of the link have the same x86 (i386) package installed. On the server again: stunnel: LOG6[23986:3073268544]: SSL accepted: new session negotiated stunnel: LOG6[23986:3073268544]: Negotiated TLSv1/SSLv3 ciphersuite: ECDHE-RSA-RC4-SHA (128-bit encryption) stunnel: LOG6[23986:3073268544]: Compression: null, expansion: null stunnel: LOG7[23986:3073268544]: TTY=/dev/pts/5 allocated stunnel: LOG6[23986:3073268544]: Local mode child started (PID=23989) stunnel: LOG7[23986:3073268544]: Remote socket (FD=14) initialized stunnel: LOG3[23986:3073268544]: TCP_NODELAY: Socket operation on non-socket (88) stunnel: LOG4[23986:3073268544]: Failed to set remote socket options pppd[23989]: pppd options in effect: pppd[23989]: debug^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: updetach^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: linkname pella^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: ktune^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: unit 3^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: dump^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: nomp^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noauth^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: ^I^I# (from /etc/ppp/options) pppd[23989]: notty^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: crtscts^I^I# (from /etc/ppp/options) pppd[23989]: local^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noaccomp^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: asyncmap 0^I^I# (from /etc/ppp/options) pppd[23989]: nopcomp^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: silent^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: lcp-echo-failure 4^I^I# (from /etc/ppp/options) pppd[23989]: lcp-echo-interval 30^I^I# (from /etc/ppp/options) pppd[23989]: hide-password^I^I# (from /etc/ppp/options) pppd[23989]: novj^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noipdefault^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noccp^I^I# (from /etc/ppp/peers/pella-vpn) pppd[23989]: noipx^I^I# (from /etc/ppp/options) pppd[23989]: pppd 2.4.5 started by root, uid 0 pppd[23989]: using channel 19 udevd[2122]: device 0xb7b0a6e8 has devpath '/devices/virtual/net/ppp3' udevd[2122]: created empty file '/run/udev/data/n27' for '/devices/virtual/net/ppp3' pppd[23989]: Using interface ppp3 pppd[23989]: Connect: ppp3 <--> /dev/pts/6 Both ends of the link have ppp interfaces but neither have IP addresses. The server configuration is: ----- /etc/stunnel/pella-vpn.conf ----- CAfile = /etc/stunnel/vpn.pem cert = /etc/stunnel/vpn.pem key = /etc/stunnel/vpn.pem output = /var/log/stunnel-vpn.log #verify = 2 debug = 7 client = no foreground = no [vpn] accept = 109.74.x.y:9876 exec = /usr/sbin/pppd execargs = pppd call pella-vpn 10.254.241.1:10.254.241.2 pty = yes ---------- ----- /etc/ppp/peers/pella-vpn ----- unit 3 notty ktune local noipdefault noccp noauth novj nomp nopcomp noaccomp silent updetach linkname pella debug dump ---------- # ifconfig ppp3 ppp3 Link encap:Point-to-Point Protocol POINTOPOINT NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) The client configuration is: ---- /etc/network/interfaces ----- # SSL VPN to Pella iface ppp3 inet ppp unit 3 provider pella-vpn pre-up /sbin/ifconfig ppp0 up ---------- ----- /etc/ppp/peers/pella-vpn ----- # ensure we use ppp3 (ppp0-2 are already in use) unit 3 ktune local noipdefault noccp noauth novj nomp nopcomp noaccomp silent updetach logfd 2 linkname pella pty "/usr/bin/stunnel4 /etc/stunnel/pella.conf.vpn" user "tj" # debugging debug dump ---------- ----- /etc/stunnel/pella.conf.vpn ----- pid = /var/run/stunnel4/pella.pid debug = debug output = /var/log/stunnel-pella.log foreground = no client=yes connect = 109.74.x.y:9876 CAfile = /etc/stunnel/vpn.pem # verify the peer's certificate verify = 2 ---------- # ifup ppp3 pppd options in effect: debug # (from /etc/ppp/peers/pella-vpn) updetach # (from command line) logfd 2 # (from /etc/ppp/peers/pella-vpn) linkname pella # (from /etc/ppp/peers/pella-vpn) ktune # (from /etc/ppp/peers/pella-vpn) unit 3 # (from command line) dump # (from /etc/ppp/peers/pella-vpn) nomp # (from /etc/ppp/peers/pella-vpn) noauth # (from /etc/ppp/peers/pella-vpn) user tj # (from /etc/ppp/peers/pella-vpn) # (from /etc/ppp/options) pty /usr/bin/stunnel4 /etc/stunnel/pella.conf.vpn # (from /etc/ppp/peers/pella-vpn) crtscts # (from /etc/ppp/options) local # (from /etc/ppp/peers/pella-vpn) noaccomp # (from /etc/ppp/peers/pella-vpn) asyncmap 0 # (from /etc/ppp/options) nopcomp # (from /etc/ppp/peers/pella-vpn) silent # (from /etc/ppp/peers/pella-vpn) lcp-echo-failure 4 # (from /etc/ppp/options) lcp-echo-interval 30 # (from /etc/ppp/options) hide-password # (from /etc/ppp/options) novj # (from /etc/ppp/peers/pella-vpn) noipdefault # (from /etc/ppp/peers/pella-vpn) noccp # (from /etc/ppp/peers/pella-vpn) noipx # (from /etc/ppp/options) using channel 43 Using interface ppp3 Connect: ppp3 <--> /dev/pts/5 # ifconfig ppp3 ppp3 Link encap:Point-to-Point Protocol POINTOPOINT NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) # netstat -natp | grep stun tcp 0 0 82.71.a.b:34437 109.74.x.y:9876 ESTABLISHED 24105/stunnel4

1 2

Fw: High memory usage problem.
by mkanet＠yahoo.com 27 Mar '13

27 Mar '13

Jeremy, I know there's an android build of stunnel. Im not trying to be funny, but are you running stunnel on your mobile phone? :) The latest android mobile phones include quadcore CPU's with 2GB's of RAM It would be interesting to see how much of a load a mobile phone can handle with a USB to RJ45 Ethernet interface. Edit: I tried sending this earlier, but it doesn't look like it went through. My apologies in case this is a duplicate. ------------------------ Thanks for taking the time to read this. We're operating on a low spec system that can not be modified at this point. stunnel was introduced at the last minute, without consideration to resource requirements and now consumes enough ram to cause the kernel to issue OOM exceptions. So in short, we are trying to trade increased CPU usage for less memory usage and have tried setting “sessions” to 3600 to reduce memory pressure, but unfortunately it doesn't last. Our current solution is to cron a restart of stunnel on a regular basis, but would prefer to limit number of threads or number of cache entries or something else altogether similarly gentler. Thanks again for your consideration and assistance in this! If there's any specific information I can give, please let me know. Regards, Jeremy

3 7

environment/user variable
by Sebastian Rose-Indorf 26 Mar '13

26 Mar '13

Hello, Stunnel is a very helpful tool. But I miss the support of a environment/user variable to reference the configuration file or the folder of the configuration file: such as %GNUPGHOME% in GnuPG or %OPENSSL_CONF% in OpenSSL. Sebastian

1 0

the range of stunnel functionality
by John A. Wallace 26 Mar '13

26 Mar '13

Where can I find more information about the use and functionality of "tstunnel.exe"? Maybe I am going quite blind, but I looked around unsuccessfully. Thanks. John A. Wallace The pen is mightier than the sword, but only if you get in the first stroke.

3 3

stunnel 4.56 released
by Michal Trojnara 23 Mar '13

23 Mar '13

Dear Users, I have released version 4.56 of stunnel. The ChangeLog entry: Version 4.56, 2013.03.22, urgency: HIGH: * New features - Win32 installer automatically configures firewall exceptions. - Win32 installer configures administrative shortcuts to invoke UAC. - Improved Win32 GUI shutdown time. * Bugfixes - Fixed a regression bug introduced in version 4.55 causing random crashes on several platforms, including Windows 7. - Fixed startup crashes on some Win32 systems. - Fixed incorrect "stunnel -exit" process synchronisation. - Fixed FIPS detection with new versions of the OpenSSL library. - Failure to open the log file at startup is no longer ignored. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hash for stunnel-4.56.tar.gz: 9cae2cfbe26d87443398ce50d7d5db54e5ea363889d5d2ec8d2778a01c871293 Best regards, Mike

2 2

4.56 FIPS startup issue
by Ian Donaldson 23 Mar '13

23 Mar '13

Hi, I've been using stunnel for years and tried to upgrade to 4.56 today and it fails to start with this error: Clients allowed=125 stunnel 4.56 on i386-pc-solaris2.9 platform Compiled/running with OpenSSL 1.0.1e 11 Feb 2013 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file /opt/local/etc/stunnel.conf FIPS_mode_set: F06D065: error:0F06D065:common libcrypto routines:FIPS_mode_set:fips mode not supported Line 36: "[pop3s]": Failed to initialize SSL str_stats: 5 block(s), 118 data byte(s), 210 control byte(s) I note some mention of FIPS in today's release. 4.55 started ok though with the same version of openssl (and crashed a few hours later), so we're back to 4.54 again. Ian D

1 1

stunnel craches in windows 7 x64
by Mosy Mosy 15 Mar '13

15 Mar '13

I have been facing with a strange bug in stunnel 4.55 (and also in tstunnel) in Windows 7 x64 and also in Windows Server 2003 R2 x86. I redirect TCP connections from a win7 client to a win2k3 server. Stunnel works fine when accepting connections and transferring data. But suddenly crashes when the client program (in the client side) closes the connection (maybe the several connections simultaneously). It happens on the server side too. Because of this problem I have to load a little program to relaunch stunnel whenever it is crashed. What I mean by 'crash' is that the windows shows the "stunnel stops working" and giving the choices to restart,stop, or debug the program. If you need more details I will be pleased to help you in this case. Thank you :) PS: I just have downloaded "stunnel-4.56b1" and I'm using it right now. I see no sign of crashing and instability until this moment :) it seems the bug is eliminated :)

1 0

4.55 is unstable
by Death Master 14 Mar '13

14 Mar '13

Windows build of 4.55, 2013.03.03 crashes every 20-60sec under load. OS:Win7 x64 (with all updates) This bug affects both stunnel and tstunnel. Please fix it soon ;)

5 6

stunnel: SSL routinesdecryption failed or bad record mac
by Kishore Paul 13 Mar '13

13 Mar '13

Hello Everyone, I updated to the latest version of stunnel and openssl and am still getting a lot of decryption fails. stunnel: SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac and a few times it just segfaults: [937987.314573] stunnel: segfault at 7f6164025000 ip 00007f616d8b5adc sp 00007f616e6a9af0 error 4 in libcrypto.so.1.0.0[7f616d84a000+19f000] stunnel 4.54 on x86_64-unknown-linux-gnu platform Compiled with OpenSSL 1.0.1e 11 Feb 2013 Running with OpenSSL 1.0.1 14 Mar 2012 Is there any way to avoid these errors? I limited my cipher set to just RC4-SHA after seeing that there is an issue even in openssl 1.01e-1 for e_aes_cbc_hmac_sha1.c http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=678353 Appreciate your help. Thanks, Kishore

1 0

Need help to configure STUNNEL using proxy socks v5 to send file to a server
by laurent.uk＠bnpparibas.com 11 Mar '13

11 Mar '13

Hi everyone, I need to connect to proxy socks V5 in order to send file in my server. I configure my stunnel like this : sslVersion = SSLv3 client=yes cert = /opt/freeware/etc/stunnel/ca_nopass.pem pid = /var/adm/stunnel_test.pid socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 debug = 7 output = /logs/stunnel/stunnel.log ; Don't forget to c_rehash CApath ; CApath is located inside chroot jail CApath = /opt/freeware/etc/stunnel/CA_files/ protocol = connect protocolAuthentication = basic protocolHost = ***:8080 [pesit] accept = 12099 connect = ***:433 But it doesn't works! The log from my stunnel client : 2013.03.11 18:57:30 LOG5[26673178:260]: Service pesit accepted connection from ***:48549 2013.03.11 18:57:30 LOG7[26673178:260]: remote socket: FD=1 allocated (non-blocking mode) 2013.03.11 18:57:30 LOG6[26673178:260]: connect_blocking: connecting ::1:10443 2013.03.11 18:57:30 LOG3[26673178:260]: connect_blocking: connect ::1:10443: Connection refused (79) 2013.03.11 18:57:30 LOG7[26673178:260]: remote socket: FD=1 allocated (non-blocking mode) 2013.03.11 18:57:30 LOG6[26673178:260]: connect_blocking: connecting ****:10443 2013.03.11 18:57:30 LOG5[26673178:260]: connect_blocking: connected ****:10443 2013.03.11 18:57:30 LOG5[26673178:260]: Service pesit connected remote server from ****:48551 2013.03.11 18:57:30 LOG7[26673178:260]: Remote FD=1 initialized 2013.03.11 18:57:30 LOG7[26673178:260]: Option TCP_NODELAY set on remote socket 2013.03.11 18:57:30 LOG6[26673178:260]: Client-mode connect protocol negotiations started 2013.03.11 18:57:30 LOG7[26673178:260]: -> CONNECT ****:1080 HTTP/1.1 2013.03.11 18:57:30 LOG7[26673178:260]: -> Host: ****:1080 2013.03.11 18:57:30 LOG7[26673178:260]: -> 2013.03.11 18:57:30 LOG3[26673178:260]: fdgetline: readsocket: Connection reset by peer (73) 2013.03.11 18:57:30 LOG5[26673178:260]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2013.03.11 18:57:30 LOG7[26673178:260]: Service pesit finished (0 left) 2013.03.11 18:57:30 LOG7[26673178:260]: str_stats: 0 block(s), 0 data byte(s), 0 control byte(s) 2013.03.11 18:57:32 LOG7[26673178:1]: local socket: FD=0 allocated (non-blocking mode) In my stunnel server, i have the following message : "SSL_accept: 1407609B: error:1407609B:SSL routines:SSL23_GET_CLIENT_HELLO:https proxy request" 2013.03.11 18:57:30 LOG7[27525210:1]: Service pesitip accepted FD=0 from ****:48551 2013.03.11 18:57:30 LOG7[27525210:265]: Service pesitip started 2013.03.11 18:57:30 LOG7[27525210:265]: Option TCP_NODELAY set on local socket 2013.03.11 18:57:30 LOG5[27525210:265]: Service pesitip accepted connection from 159.50.49.69:48551 2013.03.11 18:57:30 LOG3[27525210:265]: SSL_accept: 1407609B: error:1407609B:SSL routines:SSL23_GET_CLIENT_HELLO:https proxy request 2013.03.11 18:57:30 LOG5[27525210:265]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2013.03.11 18:57:30 LOG7[27525210:265]: Service pesitip finished (0 left) 2013.03.11 18:57:30 LOG7[27525210:265]: str_stats: 0 block(s), 0 data byte(s), 0 control byte(s) 2013.03.11 18:57:32 LOG7[27525210:1]: local socket: FD=0 allocated (non-blocking mode) Can you help me to configure my stunnel please? Thanks. Regards, Laurent UK This message and any attachments (the "message") is intended solely for the intended addressees and is confidential. If you receive this message in error,or are not the intended recipient(s), please delete it and any copies from your systems and immediately notify the sender. Any unauthorized view, use that does not comply with its purpose, dissemination or disclosure, either whole or partial, is prohibited. Since the internet cannot guarantee the integrity of this message which may not be reliable, BNP PARIBAS (and its subsidiaries) shall not be liable for the message if modified, changed or falsified. Do not print this message unless it is necessary,consider the environment. ---------------------------------------------------------------------------------------------------------------------------------- Ce message et toutes les pieces jointes (ci-apres le "message") sont etablis a l'intention exclusive de ses destinataires et sont confidentiels. Si vous recevez ce message par erreur ou s'il ne vous est pas destine, merci de le detruire ainsi que toute copie de votre systeme et d'en avertir immediatement l'expediteur. Toute lecture non autorisee, toute utilisation de ce message qui n'est pas conforme a sa destination, toute diffusion ou toute publication, totale ou partielle, est interdite. L'Internet ne permettant pas d'assurer l'integrite de ce message electronique susceptible d'alteration, BNP Paribas (et ses filiales) decline(nt) toute responsabilite au titre de ce message dans l'hypothese ou il aurait ete modifie, deforme ou falsifie. N'imprimez ce message que si necessaire, pensez a l'environnement.

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Mutual Authentication
by Sameer Rahmani 11 Mar '13

11 Mar '13

Hi guys, I want to have secure tunnel to my server and also i want only specified clients can connect via the tunnel to the server. I was reading about mutual authentication but i can't run stunnel using verify=2 or 3 or 4. I confused. Can you please explain for me what should i do to use 2way ssl connection? how does stunnel use this?

2 1

It doesn't work.
by Raemsh Pungavanam 11 Mar '13

11 Mar '13

Hi , i have following issue with latest version of stunnel and openssl. version ====== stunnel - 4.55 openssl - 1.0.1e stunnel.conf ========== # Sample stunnel configuration file # Copyright by Michal Trojnara 2002 # Comment it out on Win32 #cert = /etc/tr69/stunnel.pem key = /etc/tr69/stunnel.pem # chroot = /usr/local/var/run/stunnel/ # PID is created inside chroot jail pid = /var/run/ssl.pid setuid = root setgid = root # Protocol version (all, SSLv2, SSLv3, TLSv1) sslVersion = TLSv1.2 # Workaround for Eudora bug #options = DONT_INSERT_EMPTY_FRAGMENTS # Authentication stuff verify = 1 # don't forget about c_rehash CApath # it is located inside chroot jail: #CApath = /certs # or simply use CAfile instead: #CAfile = /usr/local/etc/stunnel/certs.pem #CAfile = /etc/tr69/ca.crt # CRL path or file (inside chroot jail): #CRLpath = /crls # or simply use CAfile instead: #CRLfile = /usr/local/etc/stunnel/crls.pem # Some debugging stuff debug = 7 output = /var/log/ssl.log foreground = yes # Use it for client mode client = yes # Service-level configuration [https] CAfile = /flash/Cert.pem accept = 127.0.0.1:8001 connect = acs.qacafe.com:80 #accept = 8080 cat /var/log/ssl.log ============== 2013.03.11 18:29:04 LOG5[5849:0]: stunnel 4.55 on mips-openwrt-linux-uclibc platform 2013.03.11 18:29:04 LOG5[5849:0]: Compiled/running with OpenSSL 1.0.1e 11 Feb 2013 2013.03.11 18:29:04 LOG5[5849:0]: Threading:FORK SSL:+ENGINE+OCSP Auth:none Sockets:POLL+IPv6 2013.03.11 18:29:04 LOG5[5849:0]: Reading configuration from file /etc/tr69/stunnel.conf 2013.03.11 18:29:04 LOG7[5849:0]: Compression not enabled 2013.03.11 18:29:04 LOG7[5849:0]: PRNG seeded successfully 2013.03.11 18:29:04 LOG6[5849:0]: Initializing service [https] 2013.03.11 18:29:04 LOG4[5849:0]: Insecure file permissions on /etc/tr69/stunnel.pem 2013.03.11 18:29:04 LOG7[5849:0]: Loaded verify certificates from /flash/Cert.pem 2013.03.11 18:29:04 LOG7[5849:0]: Loaded /flash/Cert.pem revocation lookup file 2013.03.11 18:29:04 LOG7[5849:0]: SSL options set: 0x00000004 2013.03.11 18:29:04 LOG5[5849:0]: Configuration successful 2013.03.11 18:29:04 LOG7[5849:0]: Service [https] (FD=17) bound to 127.0.0.1:8001 2013.03.11 18:29:04 LOG7[5849:0]: Created pid file /var/run/ssl.pid 2013.03.11 18:29:21 LOG7[5849:0]: Service [https] accepted (FD=4) from 127.0.0.1:36039 2013.03.11 18:29:21 LOG7[5920:0]: Service [https] started 2013.03.11 18:29:21 LOG5[5920:0]: Service [https] accepted connection from 127.0.0.1:36039 2013.03.11 18:29:22 LOG6[5920:0]: connect_blocking: connecting 6.0.0.1:80 2013.03.11 18:29:22 LOG7[5920:0]: connect_blocking: s_poll_wait 6.0.0.1:80: waiting 10 seconds 2013.03.11 18:29:22 LOG5[5920:0]: connect_blocking: connected 6.0.0.1:80 2013.03.11 18:29:22 LOG5[5920:0]: Service [https] connected remote server from 61.200.100.100:35694 2013.03.11 18:29:22 LOG7[5920:0]: Remote socket (FD=17) initialized 2013.03.11 18:29:22 LOG7[5920:0]: SNI: sending servername: acs.qacafe.com 2013.03.11 18:29:22 LOG7[5920:0]: SSL state (connect): before/connect initialization 2013.03.11 18:29:22 LOG7[5920:0]: SSL state (connect): SSLv3 write client hello A 2013.03.11 18:30:15 LOG7[5849:0]: Service [https] accepted (FD=4) from 127.0.0.1:36042 2013.03.11 18:30:15 LOG7[5973:0]: Service [https] started 2013.03.11 18:30:15 LOG5[5973:0]: Service [https] accepted connection from 127.0.0.1:36042 2013.03.11 18:30:15 LOG6[5973:0]: connect_blocking: connecting 6.0.0.1:80 2013.03.11 18:30:15 LOG7[5973:0]: connect_blocking: s_poll_wait 6.0.0.1:80: waiting 10 seconds 2013.03.11 18:30:15 LOG5[5973:0]: connect_blocking: connected 6.0.0.1:80 2013.03.11 18:30:15 LOG5[5973:0]: Service [https] connected remote server from 61.200.100.100:35697 2013.03.11 18:30:15 LOG7[5973:0]: Remote socket (FD=17) initialized 2013.03.11 18:30:15 LOG7[5973:0]: SNI: sending servername: acs.qacafe.com 2013.03.11 18:30:15 LOG7[5973:0]: SSL state (connect): before/connect initialization 2013.03.11 18:30:15 LOG7[5973:0]: SSL state (connect): SSLv3 write client hello A 2013.03.11 18:31:40 LOG7[5849:0]: Service [https] accepted (FD=4) from 127.0.0.1:49029 2013.03.11 18:31:40 LOG7[6023:0]: Service [https] started 2013.03.11 18:31:40 LOG5[6023:0]: Service [https] accepted connection from 127.0.0.1:49029 2013.03.11 18:31:40 LOG6[6023:0]: connect_blocking: connecting 6.0.0.1:80 2013.03.11 18:31:40 LOG7[6023:0]: connect_blocking: s_poll_wait 6.0.0.1:80: waiting 10 seconds 2013.03.11 18:31:40 LOG5[6023:0]: connect_blocking: connected 6.0.0.1:80 2013.03.11 18:31:40 LOG5[6023:0]: Service [https] connected remote server from 61.200.100.100:40051 2013.03.11 18:31:40 LOG7[6023:0]: Remote socket (FD=17) initialized 2013.03.11 18:31:40 LOG7[6023:0]: SNI: sending servername: acs.qacafe.com 2013.03.11 18:31:40 LOG7[6023:0]: SSL state (connect): before/connect initialization 2013.03.11 18:31:40 LOG7[6023:0]: SSL state (connect): SSLv3 write client hello A 2013.03.11 18:33:45 LOG7[5849:0]: Service [https] accepted (FD=4) from 127.0.0.1:49032 2013.03.11 18:33:45 LOG7[6074:0]: Service [https] started 2013.03.11 18:33:45 LOG5[6074:0]: Service [https] accepted connection from 127.0.0.1:49032 2013.03.11 18:33:45 LOG6[6074:0]: connect_blocking: connecting 6.0.0.1:80 2013.03.11 18:33:45 LOG7[6074:0]: connect_blocking: s_poll_wait 6.0.0.1:80: waiting 10 seconds 2013.03.11 18:33:45 LOG5[6074:0]: connect_blocking: connected 6.0.0.1:80 2013.03.11 18:33:45 LOG5[6074:0]: Service [https] connected remote server from 61.200.100.100:40054 2013.03.11 18:33:45 LOG7[6074:0]: Remote socket (FD=17) initialized 2013.03.11 18:33:45 LOG7[6074:0]: SNI: sending servername: acs.qacafe.com 2013.03.11 18:33:45 LOG7[6074:0]: SSL state (connect): before/connect initialization 2013.03.11 18:33:45 LOG7[6074:0]: SSL state (connect): SSLv3 write client hello A 2013.03.11 18:34:22 LOG6[5920:0]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.03.11 18:34:22 LOG5[5920:0]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.03.11 18:34:22 LOG7[5920:0]: Remote socket (FD=17) closed 2013.03.11 18:34:22 LOG7[5920:0]: Local socket (FD=4) closed 2013.03.11 18:34:22 LOG7[5920:0]: Service [https] finished 2013.03.11 18:34:22 LOG7[5920:0]: str_stats: 19 block(s), 877 data byte(s), 798 control byte(s) 2013.03.11 18:34:22 LOG7[5849:0]: Dispatching signals from the signal pipe 2013.03.11 18:34:22 LOG7[5849:0]: Processing SIGCHLD 2013.03.11 18:34:22 LOG7[5849:0]: Process 5920 finished with code 0 2013.03.11 18:34:22 LOG7[5849:0]: Signal pipe is empty 2013.03.11 18:35:15 LOG6[5973:0]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.03.11 18:35:15 LOG5[5973:0]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.03.11 18:35:15 LOG7[5973:0]: Remote socket (FD=17) closed 2013.03.11 18:35:15 LOG7[5973:0]: Local socket (FD=4) closed 2013.03.11 18:35:15 LOG7[5973:0]: Service [https] finished 2013.03.11 18:35:15 LOG7[5973:0]: str_stats: 19 block(s), 877 data byte(s), 798 control byte(s) 2013.03.11 18:35:15 LOG7[5849:0]: Dispatching signals from the signal pipe 2013.03.11 18:35:15 LOG7[5849:0]: Processing SIGCHLD 2013.03.11 18:35:15 LOG7[5849:0]: Process 5973 finished with code 0 2013.03.11 18:35:15 LOG7[5849:0]: Signal pipe is empty 2013.03.11 18:36:40 LOG6[6023:0]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.03.11 18:36:40 LOG5[6023:0]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.03.11 18:36:40 LOG7[6023:0]: Remote socket (FD=17) closed 2013.03.11 18:36:40 LOG7[6023:0]: Local socket (FD=4) closed 2013.03.11 18:36:40 LOG7[6023:0]: Service [https] finished 2013.03.11 18:36:40 LOG7[6023:0]: str_stats: 19 block(s), 877 data byte(s), 798 control byte(s) 2013.03.11 18:36:40 LOG7[5849:0]: Dispatching signals from the signal pipe 2013.03.11 18:36:40 LOG7[5849:0]: Processing SIGCHLD 2013.03.11 18:36:40 LOG7[5849:0]: Process 6023 finished with code 0 2013.03.11 18:36:40 LOG7[5849:0]: Signal pipe is empty 2013.03.11 18:38:45 LOG6[6074:0]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.03.11 18:38:45 LOG5[6074:0]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.03.11 18:38:45 LOG7[6074:0]: Remote socket (FD=17) closed 2013.03.11 18:38:45 LOG7[6074:0]: Local socket (FD=4) closed 2013.03.11 18:38:45 LOG7[6074:0]: Service [https] finished 2013.03.11 18:38:45 LOG7[6074:0]: str_stats: 19 block(s), 877 data byte(s), 798 control byte(s) 2013.03.11 18:38:45 LOG7[5849:0]: Dispatching signals from the signal pipe 2013.03.11 18:38:45 LOG7[5849:0]: Processing SIGCHLD 2013.03.11 18:38:45 LOG7[5849:0]: Process 6074 finished with code 0 2013.03.11 18:38:45 LOG7[5849:0]: Signal pipe is empty Normally under which circumstances this can happen. please help me totally clue less ... Rgds, Ramesh P

1 0

Stunnel SMP enabled?
by Michael Curran 06 Mar '13

06 Mar '13

I am running an Ubuntu system with Stunnel for 443 connections to an application on the back end. Essentially acting as a load balancer. When I look at the processor stats per processor (this is a 6-cpu system) I see cpu0 with almost 4% usage , compared to the other 5 processors hiting maybe .5% usage across the board. Is stunnel SMP enabled and passes processing amongst all 6 Procs? Or does it bind to one Proc and as long as its active it does all its work on just one PROC. We are having a lot of dropped connections when the overall system CPU hits about 23-25% .. which seems to me that it could be pushing just one CPU hard and the other 5 become basically idle. I am setting up to capture some SAR data to help confirm this effort, but it would if I knew that stunnel was setup for SMP processing.

1 0

Re: [stunnel-users] Stunnel as an "HTTPS to HTTPS" proxy
by Javier 05 Mar '13

05 Mar '13

On Tue, 05 Mar 2013 09:04:41 +0200 "jmwb(a)webmail.co.za" <jmwb(a)webmail.co.za> wrote: > Thank you for your response Javier. > > I now understand how to phrase what I am looking for. What I am looking for is > effectively an SSL Man-in-The-Middle (but please be assured that I am not > looking to build malware). However, I am still not certain from your response > that Stunnel can do this. Can the client-side handle SSL or does it only > support clear-text on the client side? > > jmwb Hi, in the example I gave to you is like this. Hope this can help you to understand how stunnel works in such scenario. 1. Web browser without SSL support. 2. It sends clear text to the IP:port where stunnel client is listening. 3. Stunnel in the client machine send ciphered text to the machine with Stunnel acting as server. 4. Stunnel in the server machine sends clear text to the web server. 5. The web server hasn't SSL support. 6. The communication is reversed to reply to the client side. With a diagram. Browser <> clear text <> stunnel<> ciphered <> stunnel <> clear text <> web server Of course, it is possible to make a MiTM attack between browser and stunnel and stunnel and web server at both sides, but not in between. To accomplish such attack you'll first need to access one of the machines and find such scenario. If both sides support SSL you don't need stunnel (unless one of the sides doesn't support SSL) and, therefore, all communications are ciphered P2P. No clear text. Except keyboard/mouse loggers in the client side. As said, is a secure tunnel, an SSL proxy. As you wish. Regards.

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Re: [stunnel-users] Disable SNI in stunnel win32 version
by Lilienberg, Daniel () 05 Mar '13

05 Mar '13

I want to use my Apache as a secure proxy (where Stunnel adds the SSL layer). With SNI enabled, I must send all hosts I want to connect to which is impossible ? This is for internet proxy usage, so all sites on Internet must be available through the proxy. It worked fine before SNI. From: Brian Wilkins [mailto:[email protected]] Sent: den 5 mars 2013 14:14 To: Lilienberg, Daniel () Subject: Re: [stunnel-users] Disable SNI in stunnel win32 version Does this help? http://langui.sh/2009/11/03/ssl-vhosting-on-the-same-ip-aka-sni/ On Tue, Mar 5, 2013 at 8:10 AM, Lilienberg, Daniel () <daniel.lilienberg(a)volvocars.com<mailto:[email protected]>> wrote: Hi, In my local vmware setup im using Apache with mod_ssl on the server side and Stunnel on client side to make a secure proxy. Im using Chrome as webbrowser to connect locally to the apache which bounces me to internet. In my setup everything worked with the older Stunnel 4.3x, but when you upgraded to a newer Openssl it enabled SNI and now its broken. Can I disable SNI in any way or so I need to recompile stunnel with an older OpenSSL package ? Im running on Win32. _______________________________________________ stunnel-users mailing list stunnel-users(a)stunnel.org<mailto:[email protected]> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

1 0

Disable SNI in stunnel win32 version
by Lilienberg, Daniel () 05 Mar '13

05 Mar '13

Hi, In my local vmware setup im using Apache with mod_ssl on the server side and Stunnel on client side to make a secure proxy. Im using Chrome as webbrowser to connect locally to the apache which bounces me to internet. In my setup everything worked with the older Stunnel 4.3x, but when you upgraded to a newer Openssl it enabled SNI and now its broken. Can I disable SNI in any way or so I need to recompile stunnel with an older OpenSSL package ? Im running on Win32.

1 0

Stunnel as an "HTTPS to HTTPS" proxy
by jmwb＠webmail.co.za 04 Mar '13

04 Mar '13

Hi, Please could you tell me if Stunnel supports HTTPS on the client-side i.e. a true SSL proxy with client-side SSL and server-side SSL (or if anyone has developed a version that does)? I have tried searching for this without luck because it is difficult to narrow down the search criteria e.g. Stunnel is already cited as an SSL proxy. jmwb ____________________________________________________________ South Africas premier free email service - www.webmail.co.za For super low premiums, click here. http://www.dialdirect.co.za/landing/oct/1/?vdn=15752

2 1

stunnel 4.55 released (security update)
by Michal Trojnara 03 Mar '13

03 Mar '13

Dear Users, I have released version 4.55 of stunnel. This is a massive bugfix release, including a security bugfix. Update is highly recommended. The ChangeLog entry: Version 4.55, 2013.03.03, urgency: HIGH: * Security bugfix - OpenSSL updated to version 1.0.1e in Win32/Android builds. - Buffer overflow vulnerability fixed in the NTLM authentication of the CONNECT protocol negotiation. See https://www.stunnel.org/CVE-2013-1762.html for details. * New features - SNI wildcard matching in server mode. - Terminal version of stunnel (tstunnel.exe) build for Win32. * Bugfixes - Fixed write half-close handling in the transfer() function (thx to Dustin Lundquist). - Fixed EAGAIN error handling in the transfer() function (thx to Jan Bee). - Restored default signal handlers before execvp() (thx to Michael Weiser). - Fixed memory leaks in protocol negotiation (thx to Arthur Mesh). - Fixed a file descriptor leak during configuration file reload (thx to Arthur Mesh). - Closed SSL sockets were removed from the the transfer() c->fds poll. - Minor fix in handling exotic inetd-mode configurations. - WCE compilation fixes. - IPv6 compilation fix in protocol.c. - Windows installer fixes. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hash for stunnel-4.55.tar.gz: 5a4acecfabd454415c727435acdfca7dc46aa542998fb278293f494a6d36d37a Best regards, Mike

1 0

Broken pipes and TCP resets on parallel requests over stunnel
by Jan Bee 22 Feb '13

22 Feb '13

Hi, I'm running stunnel (ubuntu 4.42-1, confirmed with 4.54 that has been built from source) against a backend I've only limited control over which was running fine for a long time. At some point in the last few days, the clients stopped being able to make *concurrent* HTTP requests (by different threads) over the stunnel. The client applications using the tunnel enounter a 'Connection refused' error. The issue has been isolated to curl requests (instead of the original client application). Running a tcpdump on both, loopback and uplink, showed that every additional request results in an ACK from the stunnel to both the client and the remote side and a few ms later a RST, ACK is sent in the *same* direction (again from the stunnel to both client and remote end). The stunnel log shows an error about a broken pipe whenever these failures occur: Feb 18 11:09:24 x2 stunnel: LOG7[555:139702117717760]: Socket closed on read Feb 18 11:09:24 x2 stunnel: LOG7[555:139702117717760]: Sending SSL write shutdown Feb 18 11:09:24 x2 stunnel: LOG7[555:139702117717760]: SSL alert (write): warning: close notify Feb 18 11:09:24 x2 stunnel: LOG6[555:139702117717760]: SSL_shutdown successfully sent close_notify Feb 18 11:09:24 x2 stunnel: LOG5[555:139702117717760]: Error detected on socket (read) file descriptor: Broken pipe (32) Feb 18 11:09:24 x2 stunnel: LOG5[555:139702117717760]: Connection reset: 1320 bytes sent to SSL, 48625 bytes sent to socket Feb 18 11:09:24 x2 stunnel: LOG7[555:139702117717760]: Service xtunnel finished (4 left) An strace on the stunnel shows: 6425 <... setsockopt resumed> ) = 0 6425 close(18 <unfinished ...> 6465 poll([{fd=15, events=POLLOUT}, {fd=22, events=POLLIN}], 2, 43200000 <unfinished ...> 6425 <... close resumed> ) = 0 6465 <... poll resumed> ) = 2 ([{fd=15, revents=POLLOUT|POLLERR|POLLHUP}, {fd=22, revents=POLLIN}]) 6425 sendto(13, "<31>Feb 18 11:34:35 stunnel: LOG7[6395:140601236756224]: Service xtunnel finished (4 left)", 99, MSG_NOSIGNAL, NULL, 0 <unf inished ...> 6465 getsockopt(15, SOL_SOCKET, SO_ERROR, [32], [4]) = 0 6425 <... sendto resumed> ) = 99 6465 futex(0x7fe045ec3754, FUTEX_WAIT_PRIVATE, 2, NULL <unfinished ...> 6425 futex(0x7fe045ec3754, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 6465 <... futex resumed> ) = -1 EAGAIN (Resource temporarily unavailable) 6425 <... futex resumed> ) = 0 6465 sendto(13, "<29>Feb 18 11:34:35 stunnel: LOG5[6395:140601236686592]: Error detected on socket (read) file descriptor: Broken pipe (32)", 122, MSG_NOSIGNAL, NULL, 0 <unfinished ...> 6425 write(2, "2013.02.15 11:34:35 LOG7[6395:140601236756224]: Service xtunnel finished (4 left)\n", 91 <unfinished ...> 6465 <... sendto resumed> ) = 122 6425 <... write resumed> ) = 91 6465 futex(0x7fe045ec3754, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 6425 sendto(13, "<31>Feb 18 11:34:35 stunnel: LOG7[6395:140601236756224]: str_stats: 0 block(s), 0 byte(s)", 89, MSG_NOSIGNAL, NULL, 0 <unfinished ...> 6465 <... futex resumed> ) = 0 6465 write(2, "2013.02.15 11:34:35 LOG5[6395:140601236686592]: Error detected on socket (read) file descriptor: Broken pipe (32)\n", 114 <unfinished ...> $ ps auxww|grep stunnel4 shows: root 28587 0.1 0.0 437844 7780 ? Ss 09:37 0:11 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29170 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29171 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29172 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29173 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf root 29174 0.0 0.0 43876 1180 ? S 09:37 0:00 /usr/bin/stunnel4 /etc/xtunnel/stunnel.conf The stunnel config looks like this: foreground=yes debug=7 pid=/var/run/xtunnel.pid client=yes CAfile=/etc/ssl/certs/xtunnel-chains.pem verify=3 engine=dynamic engineCtrl=SO_PATH:/usr/lib/engines/engine_pkcs11.so engineCtrl=ID:pkcs11 engineCtrl=LIST_ADD:1 engineCtrl=LOAD engineCtrl=MODULE_PATH:libopencryptoki.so.0 engineCtrl=INIT engineCtrl=PIN:XXXXXX [xtunnel] engineNum=1 key=id_4 cert=/etc/xtunnel/client-cert.pem accept=127.0.0.1:9999 connect=192.168.200.1:8443 Does anyone have an idea what could be going wrong here or how to troubleshoot this any further? Thanks! Jan

1 0

Stunnel in pgsql mode, libpq, and SSL session caching..
by Matt Wise 17 Feb '13

17 Feb '13

Is there any level of SSL Session Caching when using Stunnel in pgsql mode, and using libpq-based Postgres clients? If not, I'm wondering what tuning we can do on the Stunnel side to get the best performance if we have alot of clients that connect very fequently to the servers.. --matt

1 0

STUNNEL --- How to chose the AES cipher with TLS v1.2
by Editor 14 Feb '13

14 Feb '13

Hi to all: In reading the FAQ and looking at the sample configuration file, I do not see an example of how to correctly configure the application to use the more current AES-256 or the AES-128 cipher configurations. I do have the current OpenSSL on the host (a Sun SPARC box). The idea is to use this host as a SSL proxy for a number of services. I did see this reference: options = CIPHER_SERVER_PREFERENCE But not how to then set the SSL cipher except as I found on Google. There was this on the MAN page but it seems to fail in my configuration: ciphers = cipherlist Select permitted SSL ciphers. A colon delimited list of the ciphers to allow in the SSL connection. For example DES-CBC3-SHA:IDEA-CBC-MD5 Thanks. Kevin Reference Ciphers supported by OpenSSL: http://www.openssl.org/docs/apps/ciphers.html

2 1

stunnel port question
by Stewart Anderson 13 Feb '13

13 Feb '13

Hi all, ty in advance for any help. I have a service that I can connect to a destination over stunnel, but I am not able to get the ack I expect. Internal sending service => stunnel => external listening service I think the problem may be that the firewall is blocking inbound traffic. I need to specify a specific port for the firewall team to open so that traffic can get back to my stunnel service, since every time stunnel starts it will be making a connection from a different port on the external facing side of the SSL encapsulation service/pipe/whatever you want to call it!! What would be the best way to configure stunnel for that scenario. I can see the INETD mode but that does not seem to be what I am looking for, I can also see the transparent option but not sure what that really does. Any advice appreciated. Regards Stewart Your Hospital needs YOU! We need you to register as a Public, Patient or Staff member and help shape the future of your healthcare. Call 0800 280 2581 to register by phone or you can email bradfordhospitals(a)capitaregistrars.com<mailto:[email protected]> and ask to be registered as a new member. For more information about our hospitals and Foundation Trust Membership please visit www.bradfordhospitals.nhs.uk<http://www.bradfordhospitals.nhs.uk> This message is confidential. It may also contain privileged information. The contents of this e-mail and any attachments are intended for the named addressee only. Unless you are the named addressee or authorised to receive the e-mail of the named addressee you may not disclose, use or copy the contents of the e-mail. If you are not the person for whom the message was intended, please notify the sender immediately at Bradford Teaching Hospitals NHS Foundation Trust and delete the material from your computer. You must not use the message for any other purpose, nor disclose its contents to any person other than the intended recipient. Bradford Teaching Hospitals NHS Foundation Trust does not accept responsibility for this message and any views or opinions contained in this e-mail are solely those of the author unless expressly stated otherwise.

1 0

Stunnel over a separate proxy?
by Alex Gottschalk 12 Feb '13

12 Feb '13

I've successfully deployed stunnel4 to wrap rsync for transferring data between remote sites and a central repository. The issue I'm running into, is that some of these sites mandate use of a proxy (HTTP or SOCKS5 usually) for outbound network connections. It seems like there is some proxy support in stunnel with the protocol{Host,Authentication,etc} configuration options, but I have had zero luck getting them to work. For example, I've tried making a simple SOCKS5 proxy using ssh, that I'm successfully able to send HTTP traffic over: ssh -g -D1080 proxy-host # create the proxy, open port 1080 on a public interface then in the client stunnel.conf: [rsync] protocol = connect protocolHost = proxy-host:1080 accept = 127.0.0.1:873 connect = rsync-destination:443 Keep in mind this is an already-working stunnel - the only difference is the addition of the protocol and protocolHost lines above. When I run stunnel in the foreground with that configuration change, I get the following error trying to run rsync: $ rsync -v dev.inst.kvpdata rsync://localhost/putdata/ rsync: read error: Connection reset by peer (104) rsync error: error in rsync protocol data stream (code 12) at io.c(605) [sender=2.6.9] And no log messages appear in stunnel's stderr whatsoever. What am I doing wrong? I get identical results using an HTTP proxy with squid, instead of the socks5 proxy. Thanks, please let me know if there's any more information I should include to help with figuring this out. Alex Gottschalk

3 4

transfer() loop executes not transferring any data and truncated data when using unix sockets
by Stephen Balukoff 08 Feb '13

08 Feb '13

Hello! Recently we started seeing some erroneous behavior in one of our load balancer configurations in which we're using stunnel for SSL tunnel termination with web clients. Specifically, the setup looks like the following: Web client ---(SSL)---> stunnel ---(unix socket)--> haproxy ---(tcp/http)---> web server After extensive troubleshooting we were able to determine that when the following parameters are present: * Client forces non-keepalive connection * Client generates a POST request, the response to which (generated by the back-end web server) is greater than about 8k * stunnel and haproxy communicate via unix socket ...then most responses end up being truncated by an extraneous TCP RST packet from stunnel, and the following log lines are generated: Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: transfer() loop executes not transferring any data Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: please report the problem to Michal.Trojnara(a)mirt.net Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: stunnel 4.54 on x86_64-unknown-linux-gnu platform Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: Compiled/running with OpenSSL 1.0.0-fips 29 Mar 2010 Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: Threading:PTHREAD SSL:+ENGINE+OCSP+FIPS Auth:none Sockets:POLL+IPv6 Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: protocol=TLSv1, SSL_pending=0 Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: sock_open_rd=n, sock_open_wr=Y Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: SSL_RECEIVED_SHUTDOWN=n, SSL_SENT_SHUTDOWN=Y Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: sock_can_rd=Y, sock_can_wr=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: ssl_can_rd=n, ssl_can_wr=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: read_wants_read=Y, read_wants_write=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: write_wants_read=n, write_wants_write=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: shutdown_wants_read=n, shutdown_wants_write=n Jan 23 15:24:17 ds420a stunnel: LOG3[22586:139835614443264]: socket input buffer: 0 byte(s), ssl input buffer: 0 byte(s) The work arounds we have found are either: 1. Make stunnel and haproxy communicate over a TCP socket bound to the loopback interface (less ideal, as then we're limited to 65k connections) 2. Add the "reset=no" parameter to our stunnel.conf (which seems to fix the problem, but makes me wonder if we're not opening ourselves up to other problems-- like really getting stuck in an infinite loop that that watchdog is intended to avoid.) In any case based on what "reset=no" is supposed to do as well as where that first line of the error output above is being generated in the code, it's clear that the main client data transfer loop in client.c (starting line 519) is being called too often with no data to transfer, which triggers the infinite loop detection in the transfer() function (client.c, starting line 832). My best hypothesis at this point is that the transfer() code was written only with TCP sockets in mind, and that something about the unix socket in use here is triggering that loop too often. Maybe s_poll_wait on line 541 is being called with parameters which are right for a TCP socket but inappropriate for a unix socket? At this point though, we're at the limit of my socket programming ability, so I'm a little stuck. (Would like to have simply fixed this and submitted a patch... but cest la vie, eh.) We'd like to avoid using a TCP socket to communicate between stunnel and haproxy simply because it's a little less efficient, and because there's an artificial 65k limit on the number of back-end connections we can support per loopback IP if we do that. Alternatively, if someone could verify that "reset=no" is an acceptable / safe work around in this case, I'd appreciate that (though, of course, I'd prefer my logs not to get spammed on every connection. :P ) Is there any other data I can provide to help troubleshoot and fix this? Thanks, Stephen -- Stephen Balukoff Blue Box Group, LLC (800)613-4305 x807

3 3

LZ4
by Death Master 06 Feb '13

06 Feb '13

Do you plan adding LZ4(much faster than gzip) support to stunnel?

2 1

Re: [stunnel-users] fix resource leaks and potential null
by Arthur Mesh 05 Feb '13

05 Feb '13

dereferences in 4.54 Reply-To: In-Reply-To: <mailman.1.1359889202.25775.stunnel-users(a)stunnel.org> On Sun, Feb 03, 2013 at 12:00:02PM +0100, stunnel-users-request(a)stunnel.org wrote: > > - char line_text[CONFLINELEN], *errstr; > > + char line_text[CONFLINELEN], *errstr = NULL; > Were you able to identify a case where it's used without > initialization? This is interesting. > It would be a good idea to fix it there instead of implementing a > workaround here. Hi, I will provide the output of coverity run for these defect: int parse_conf(char *name, CONF_TYPE type) { 1997 DISK_FILE *df; At (1): Declaring variable "errstr" without initializer. 1998 char line_text[CONFLINELEN], *errstr; 1999 char config_line[CONFLINELEN], *config_opt, *config_arg; 2000 int line_number, i; 2001 SERVICE_OPTIONS *section, *new_section; 2002 static char *filename=NULL; /* a copy of config file name for reloading */ 2003#ifndef USE_WIN32 2004 int fd; 2005 char *tmpstr; 2006#endif 2007 At (2): Condition "name", taking true branch 2008 if(name) /* not reload */ 2009 filename=str_dup(name); 2010 At (3): Condition "type == 2U", taking true branch 2011 s_log(LOG_NOTICE, "Reading configuration from %s %s", 2012 type==CONF_FD ? "descriptor" : "file", filename); 2013#ifndef USE_WIN32 At (4): Condition "type == 2U", taking true branch 2014 if(type==CONF_FD) { /* file descriptor */ 2015 fd=strtol(filename, &tmpstr, 10); At (5): Condition "tmpstr == filename", taking false branch At (6): Condition "*tmpstr", taking false branch 2016 if(tmpstr==filename || *tmpstr) { /* not a number */ 2017 s_log(LOG_ERR, "Invalid file descriptor number"); 2018 print_syntax(); 2019 return 1; 2020 } 2021 df=file_fdopen(fd); At (7): Falling through to end of if statement 2022 } else 2023#endif 2024 df=file_open(filename, 0); At (8): Condition "!df", taking false branch 2025 if(!df) { 2026 s_log(LOG_ERR, "Cannot read configuration"); 2027 if(type!=CONF_RELOAD) 2028 print_syntax(); 2029 return 1; 2030 } 2031 2032 memset(&new_global_options, 0, sizeof(GLOBAL_OPTIONS)); /* reset global options */ 2033 memset(&new_service_options, 0, sizeof(SERVICE_OPTIONS)); /* reset local options */ 2034 new_service_options.next=NULL; 2035 section=&new_service_options; 2036 parse_global_option(CMD_BEGIN, NULL, NULL); 2037 parse_service_option(CMD_BEGIN, section, NULL, NULL); At (9): Condition "type != 0U", taking true branch 2038 if(type!=CONF_RELOAD) { /* provide defaults for gui.c */ 2039 memcpy(&global_options, &new_global_options, sizeof(GLOBAL_OPTIONS)); 2040 memcpy(&service_options, &new_service_options, sizeof(SERVICE_OPTIONS)); 2041 } 2042 2043 line_number=0; At (10): Condition "file_getline(df, line_text, 16384) >= 0", taking true branch At (19): Condition "file_getline(df, line_text, 16384) >= 0", taking false branch 2044 while(file_getline(df, line_text, CONFLINELEN)>=0) { 2045 memcpy(config_line, line_text, CONFLINELEN); 2046 ++line_number; 2047 config_opt=config_line; At (11): Condition "__istype((unsigned char)*config_opt, 16384UL)", taking true branch At (12): Condition "__istype((unsigned char)*config_opt, 16384UL)", taking false branch 2048 while(isspace((unsigned char)*config_opt)) 2049 ++config_opt; /* remove initial whitespaces */ At (13): Condition "i >= 0", taking true branch At (14): Condition "__istype((unsigned char)config_opt[i], 16384UL)", taking true branch At (15): Condition "i >= 0", taking true branch At (16): Condition "__istype((unsigned char)config_opt[i], 16384UL)", taking false branch 2050 for(i=strlen(config_opt)-1; i>=0 && isspace((unsigned char)config_opt[i]); --i) 2051 config_opt[i]='\0'; /* remove trailing whitespaces */ At (17): Condition "config_opt[0] == 0", taking true branch 2052 if(config_opt[0]=='\0' || config_opt[0]=='#' || config_opt[0]==';') /* empty or comment */ At (18): Continuing loop 2053 continue; 2054 if(config_opt[0]=='[' && config_opt[strlen(config_opt)-1]==']') { /* new section */ 2055 if(!new_service_options.next) { 2056 errstr=parse_global_option(CMD_END, NULL, NULL); 2057 if(errstr) { 2058 s_log(LOG_ERR, "Line %d: \"%s\": %s", line_number, line_text, errstr); 2059 file_close(df); 2060 return 1; 2061 } 2062 } 2063 ++config_opt; 2064 config_opt[strlen(config_opt)-1]='\0'; 2065 new_section=str_alloc(sizeof(SERVICE_OPTIONS)); 2066 memcpy(new_section, &new_service_options, sizeof(SERVICE_OPTIONS)); 2067 new_section->servname=str_dup(config_opt); 2068 new_section->session=NULL; 2069 new_section->next=NULL; 2070 section->next=new_section; 2071 section=new_section; 2072 continue; 2073 } 2074 config_arg=strchr(config_line, '='); 2075 if(!config_arg) { 2076 s_log(LOG_ERR, "Line %d: \"%s\": No '=' found", line_number, line_text); 2077 file_close(df); 2078 return 1; 2079 } 2080 *config_arg++='\0'; /* split into option name and argument value */ 2081 for(i=strlen(config_opt)-1; i>=0 && isspace((unsigned char)config_opt[i]); --i) 2082 config_opt[i]='\0'; /* remove trailing whitespaces */ 2083 while(isspace((unsigned char)*config_arg)) 2084 ++config_arg; /* remove initial whitespaces */ 2085 errstr=parse_service_option(CMD_EXEC, section, config_opt, config_arg); 2086 if(!new_service_options.next && errstr==option_not_found) 2087 errstr=parse_global_option(CMD_EXEC, config_opt, config_arg); 2088 if(errstr) { 2089 s_log(LOG_ERR, "Line %d: \"%s\": %s", line_number, line_text, errstr); 2090 file_close(df); 2091 return 1; 2092 } 2093 } 2094 file_close(df); 2095 At (20): Condition "new_service_options.next", taking true branch 2096 if(new_service_options.next) { /* daemon mode: initialize sections */ At (21): Condition "section", taking false branch 2097 for(section=new_service_options.next; section; section=section->next) { 2098 s_log(LOG_INFO, "Initializing service [%s]", section->servname); 2099 errstr=parse_service_option(CMD_END, section, NULL, NULL); 2100 if(errstr) 2101 break; 2102 } At (22): Falling through to end of if statement 2103 } else { /* inetd mode: need to initialize global options */ 2104 errstr=parse_global_option(CMD_END, NULL, NULL); 2105 if(errstr) { 2106 s_log(LOG_ERR, "Global options: %s", errstr); 2107 return 1; 2108 } 2109 s_log(LOG_INFO, "Initializing inetd mode configuration"); 2110 section=&new_service_options; 2111 errstr=parse_service_option(CMD_END, section, NULL, NULL); 2112 } CID 32706: Uninitialized pointer read (UNINIT)At (23): Using uninitialized value "errstr". 2113 if(errstr) { CID 32693: Dereference after null check (FORWARD_NULL) [select defect] 2114 s_log(LOG_ERR, "Service [%s]: %s", section->servname, errstr); 2115 return 1; 2116 } > > - s_log(LOG_ERR, "Service [%s]: %s", section->servname, errstr); > > + s_log(LOG_ERR, "Service [%s]: %s", section ? section->servname : "", > > + errstr); > Again it would be useful to fix the root cause instead of implementing a > workaround. Coverity output: At (1): Condition "name", taking true branch 2008 if(name) /* not reload */ 2009 filename=str_dup(name); 2010 At (2): Condition "type == 2U", taking true branch 2011 s_log(LOG_NOTICE, "Reading configuration from %s %s", 2012 type==CONF_FD ? "descriptor" : "file", filename); 2013#ifndef USE_WIN32 At (3): Condition "type == 2U", taking true branch 2014 if(type==CONF_FD) { /* file descriptor */ 2015 fd=strtol(filename, &tmpstr, 10); At (4): Condition "tmpstr == filename", taking false branch At (5): Condition "*tmpstr", taking false branch 2016 if(tmpstr==filename || *tmpstr) { /* not a number */ 2017 s_log(LOG_ERR, "Invalid file descriptor number"); 2018 print_syntax(); 2019 return 1; 2020 } 2021 df=file_fdopen(fd); At (6): Falling through to end of if statement 2022 } else 2023#endif 2024 df=file_open(filename, 0); At (7): Condition "!df", taking false branch 2025 if(!df) { 2026 s_log(LOG_ERR, "Cannot read configuration"); 2027 if(type!=CONF_RELOAD) 2028 print_syntax(); 2029 return 1; 2030 } 2031 2032 memset(&new_global_options, 0, sizeof(GLOBAL_OPTIONS)); /* reset global options */ 2033 memset(&new_service_options, 0, sizeof(SERVICE_OPTIONS)); /* reset local options */ 2034 new_service_options.next=NULL; 2035 section=&new_service_options; 2036 parse_global_option(CMD_BEGIN, NULL, NULL); 2037 parse_service_option(CMD_BEGIN, section, NULL, NULL); At (8): Condition "type != 0U", taking true branch 2038 if(type!=CONF_RELOAD) { /* provide defaults for gui.c */ 2039 memcpy(&global_options, &new_global_options, sizeof(GLOBAL_OPTIONS)); 2040 memcpy(&service_options, &new_service_options, sizeof(SERVICE_OPTIONS)); 2041 } 2042 2043 line_number=0; At (9): Condition "file_getline(df, line_text, 16384) >= 0", taking true branch At (18): Condition "file_getline(df, line_text, 16384) >= 0", taking false branch 2044 while(file_getline(df, line_text, CONFLINELEN)>=0) { 2045 memcpy(config_line, line_text, CONFLINELEN); 2046 ++line_number; 2047 config_opt=config_line; At (10): Condition "__istype((unsigned char)*config_opt, 16384UL)", taking true branch At (11): Condition "__istype((unsigned char)*config_opt, 16384UL)", taking false branch 2048 while(isspace((unsigned char)*config_opt)) 2049 ++config_opt; /* remove initial whitespaces */ At (12): Condition "i >= 0", taking true branch At (13): Condition "__istype((unsigned char)config_opt[i], 16384UL)", taking true branch At (14): Condition "i >= 0", taking true branch At (15): Condition "__istype((unsigned char)config_opt[i], 16384UL)", taking false branch 2050 for(i=strlen(config_opt)-1; i>=0 && isspace((unsigned char)config_opt[i]); --i) 2051 config_opt[i]='\0'; /* remove trailing whitespaces */ At (16): Condition "config_opt[0] == 0", taking true branch 2052 if(config_opt[0]=='\0' || config_opt[0]=='#' || config_opt[0]==';') /* empty or comment */ At (17): Continuing loop 2053 continue; 2054 if(config_opt[0]=='[' && config_opt[strlen(config_opt)-1]==']') { /* new section */ 2055 if(!new_service_options.next) { 2056 errstr=parse_global_option(CMD_END, NULL, NULL); 2057 if(errstr) { 2058 s_log(LOG_ERR, "Line %d: \"%s\": %s", line_number, line_text, errstr); 2059 file_close(df); 2060 return 1; 2061 } 2062 } 2063 ++config_opt; 2064 config_opt[strlen(config_opt)-1]='\0'; 2065 new_section=str_alloc(sizeof(SERVICE_OPTIONS)); 2066 memcpy(new_section, &new_service_options, sizeof(SERVICE_OPTIONS)); 2067 new_section->servname=str_dup(config_opt); 2068 new_section->session=NULL; 2069 new_section->next=NULL; 2070 section->next=new_section; 2071 section=new_section; 2072 continue; 2073 } 2074 config_arg=strchr(config_line, '='); 2075 if(!config_arg) { 2076 s_log(LOG_ERR, "Line %d: \"%s\": No '=' found", line_number, line_text); 2077 file_close(df); 2078 return 1; 2079 } 2080 *config_arg++='\0'; /* split into option name and argument value */ 2081 for(i=strlen(config_opt)-1; i>=0 && isspace((unsigned char)config_opt[i]); --i) 2082 config_opt[i]='\0'; /* remove trailing whitespaces */ 2083 while(isspace((unsigned char)*config_arg)) 2084 ++config_arg; /* remove initial whitespaces */ 2085 errstr=parse_service_option(CMD_EXEC, section, config_opt, config_arg); 2086 if(!new_service_options.next && errstr==option_not_found) 2087 errstr=parse_global_option(CMD_EXEC, config_opt, config_arg); 2088 if(errstr) { 2089 s_log(LOG_ERR, "Line %d: \"%s\": %s", line_number, line_text, errstr); 2090 file_close(df); 2091 return 1; 2092 } 2093 } 2094 file_close(df); 2095 At (19): Condition "new_service_options.next", taking true branch 2096 if(new_service_options.next) { /* daemon mode: initialize sections */ At (20): Comparing "section" to null implies that "section" might be null. At (21): Condition "section", taking false branch 2097 for(section=new_service_options.next; section; section=section->next) { 2098 s_log(LOG_INFO, "Initializing service [%s]", section->servname); 2099 errstr=parse_service_option(CMD_END, section, NULL, NULL); 2100 if(errstr) 2101 break; 2102 } At (22): Falling through to end of if statement 2103 } else { /* inetd mode: need to initialize global options */ 2104 errstr=parse_global_option(CMD_END, NULL, NULL); 2105 if(errstr) { 2106 s_log(LOG_ERR, "Global options: %s", errstr); 2107 return 1; 2108 } 2109 s_log(LOG_INFO, "Initializing inetd mode configuration"); 2110 section=&new_service_options; 2111 errstr=parse_service_option(CMD_END, section, NULL, NULL); 2112 } CID 32706: Uninitialized pointer read (UNINIT) [select defect] At (23): Condition "errstr", taking true branch 2113 if(errstr) { CID 32693: Dereference after null check (FORWARD_NULL)At (24): Dereferencing null pointer "section". 2114 s_log(LOG_ERR, "Service [%s]: %s", section->servname, errstr); 2115 return 1; 2116 } > > - if(!strcasecmp(fl->name, string)) { > > + if(string && !strcasecmp(fl->name, string)) { > Could you give an example parameter where "string" may be NULL here? 2238/* facilities only make sense on Unix */ 2239#if !defined (USE_WIN32) && !defined (__vms) At (1): Condition "strchr(string, 46)", taking true branch 2240 if(strchr(string, '.')) { /* we have a facility specified */ 2241 new_global_options.facility=-1; 2242 string=strtok(arg_copy, "."); /* break it up */ 2243 At (2): Condition "fl->name", taking true branch 2244 for(fl=facilities; fl->name; ++fl) { At (3): Condition "!strcasecmp(fl->name, string)", taking true branch 2245 if(!strcasecmp(fl->name, string)) { 2246 new_global_options.facility=fl->value; At (4): Breaking from loop 2247 break; 2248 } 2249 } At (5): Condition "new_global_options.facility == -1", taking false branch 2250 if(new_global_options.facility==-1) 2251 return 1; /* FAILED */ 2252 string=strtok(NULL, "."); /* set to the remainder */ 2253 } 2254#endif /* USE_WIN32, __vms */ 2255 2256 /* time to check the syslog level */ At (6): Comparing "string" to null implies that "string" might be null. At (7): Condition "string", taking false branch 2257 if(string && strlen(string)==1 && *string>='0' && *string<='7') { 2258 new_global_options.debug_level=*string-'0'; 2259 return 0; /* OK */ 2260 } 2261 new_global_options.debug_level=8; /* illegal level */ At (8): Condition "fl->name", taking true branch 2262 for(fl=levels; fl->name; ++fl) { CID 11183: Dereference after null check (FORWARD_NULL)At (9): Passing null pointer "string" to function "strcasecmp(char const *, char const *)", which dereferences it. 2263 if(!strcasecmp(fl->name, string)) { 2264 new_global_options.debug_level=fl->value; 2265 break; 2266 } 2267 } 2268 if(new_global_options.debug_level==8) 2269 return 1; /* FAILED */ 2270 return 0; /* OK */ 2271} Let me know if more info is required. Thanks

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