- stunnel-users - stunnel.org

Re: [stunnel-users] certificate verify failed
by Aaron Haywood 05 May '14

05 May '14

Roman, I was wondering if you changed your verify from level 3 to level 2, and if this resolved your peer disconnection error with stunnel. We're experiencing a similar problem but was wondering if anyone out there has resolved this issue already; and if so..how? :) Respectfully, Aaron Haywood | Systems Administrator [cid:[email protected]] O: 858.614.1547 | M: 858.699.8302 | www.sdhealthconnect.org CONNECT WITH US: Facebook<https://www.facebook.com/SDHealthConnect?filter=1> | Twitter<https://twitter.com/SDHealthConnect> | LinkedIn<http://www.linkedin.com/company/san-diego-health-connect?trk=company_logo> | Google+<https://plus.google.com/u/0/b/112077458420951237937/112077458420951237937/p…> | YouTube<http://www.youtube.com/SDHealthConnect>

1 0

New stunnel how-to
by Patrick J. 30 Apr '14

30 Apr '14

Hi all, I've spent some time to write a new stunnel how-to. - Install and configure stunnel on a Raspberry Pi - Run stunnel in a chroot jail - Limit allowed ciphers and force Forward Secrecy - Restrict access to the stunnel server (verify = 3) - Disguise SSH as HTTPS traffic http://stunnel.qnea.net/ Regards from Germany, Patrick

1 1

Error 126 compiling on Mac OS X 10.7.5
by James Brown 29 Apr '14

29 Apr '14

I’ve just tried to install version 5.01 and encountered an error. I had no problems installing 5.01b1 previously. I just thought I’d install the release version. System is running Mac OS X 10.7.5. make ends with a warning, and make install fails: ld: warning: directory not found for option '-L/usr//lib64' Making all in doc make[1]: Nothing to be done for `all'. Making all in tools make[1]: Nothing to be done for `all'. make[1]: Nothing to be done for `all-am'. mail:stunnel-5.01 2 jlbrown$ sudo make install Password: Making install in src ../auto/install-sh -c -d '/usr/local/bin' /bin/sh ../libtool --mode=install /usr/bin/install -c stunnel '/usr/local/bin' libtool: install: /usr/bin/install -c stunnel /usr/local/bin/stunnel ../auto/install-sh -c -d '/usr/local/bin' /usr/bin/install -c stunnel3 '/usr/local/bin' ../auto/install-sh -c -d '/usr/local/lib/stunnel' /bin/sh ../libtool --mode=install /usr/bin/install -c libstunnel.la '/usr/local/lib/stunnel' libtool: install: /usr/bin/install -c .libs/libstunnel.dylib /usr/local/lib/stunnel/libstunnel.dylib libtool: install: /usr/bin/install -c .libs/libstunnel.lai /usr/local/lib/stunnel/libstunnel.la /Users/jlbrown/Downloads/stunnel-5.01: /Users/jlbrown/Downloads/stunnel-5.01: is a directory make[2]: *** [install-pkglibLTLIBRARIES] Error 126 make[1]: *** [install-am] Error 2 make: *** [install-recursive] Error 1 I just used ./configure with no arguments. Any suggestions? Thanks, James.

1 0

Verify=2 and Verification Depth...
by Matt Wise 28 Apr '14

28 Apr '14

It was my understanding that when you have an Stunnel Server configured with 'verify=2', that the client that connects must have a certificate signed by the same CA/SubCA combination that the server does. So for example: - My_Root_Ca (private CA) - Some_Random_Cert.pem - Stunnel_Sub_Ca: - Server.pem - Client.pem - Postgres_Sub_Ca: - Server.pem - postgres_user.pem With the above structure in place (and the stunnel server using Stunnel_Sub_Ca/Server.pem) if someone tried to connect in with the Stunnel_Sub_Ca/Client.pem cert, it would work... but if they tried to connect in with Postgres_Sub_Ca/Server.pem, it wouldn't. Unfortunately we're not seeing that behavior... we're seeing a behavior where *every* cert signed by the overall Root CA is validated. We're able to connect in using Some_Random_Cert.pem, Postgres_Sub_Ca/Server.pem and Postgres_Sub_Ca/postgres_user.pem. This feels wrong ... what am I missing? (We're using Stunnel 4.55 btw) Matt Wise Sr. Systems Architect Nextdoor.com

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ephemeral port limit
by Frank Liu 28 Apr '14

28 Apr '14

Hi, I am trying to use stunnel to add ssl support to my app. My app and linux server are tuned to accept 200k+ connections without a problem. When adding stunnel on the same server, the connection stops when it reaches 64k due to stunnel uses ephemeral ports to connect to my app on the localhost. Any suggestions how to get around this limit? One thing I am thinking of is to add 10 virtual interfaces on loopback: lo0:2, lo0:3, etc with ip 127.0.0.2, 127.0.0.3 etc. Can stunnel be configured to cycle through a pool of ip for outbound connection to my app listening on 127.0.0.1? That would give 10x64k of ephemeral ports. I see stunnel has "local" to specify outgoing ip, but I am not sure if it supports a list of ip or use multiple times. If so, will it round robin the list? Thanks Frank

2 2

Syringe
by Michal Trojnara 21 Apr '14

21 Apr '14

Hi Guys, I'm glad to announce syringe, a service for testing client-side heartbleed. It allows to easily examine most of the obscure TLS clients (for example embedded devices). The service is available online at https://www.stunnel.org:4433/ Best regards, Mike

2 2

hardware random
by ios dev 20 Apr '14

20 Apr '14

Hello. I am using GOST engine and set it as default for ALL. At the same time i want to use hardware RNG from other engine. How can i do this? -- BR, Dev.

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Problem with round robin on stunnel 5.0 and 5.1
by WNSDEV 14 Apr '14

14 Apr '14

When I use either of these two versions of stunnel the round-robin for "connect" only sends connections to the first host listed on the configuration file. However the round-robin works in Stunnel 4.56,4.55,4.54 and 4.53. Anyone else have this issue? Thank you, Pete Sangas ./stunnel -version stunnel 5.00 on x86_64-unknown-linux-gnu platform Compiled/running with OpenSSL 1.0.1g 7 Apr 2014 Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Global options: debug = daemon.notice RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options: ciphers = FIPS (with "fips = yes") ciphers = HIGH:MEDIUM:+3DES:+DH:!aNULL:!SSLv2 (with "fips = no") curve = prime256v1 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 Config file : CApath = /xxx/certs/trusted CAfile = /yyy/cacert.pem ciphers = RC4-SHA debug = daemon.7 pid = /zzz/stunnel.pid options = NO_SSLv2 foreground = yes setgid = gid1 setuid = uid1 delay = no fips=no [stunnel] TIMEOUTidle=86400 verify = 3 cert = /path/servercert.pem accept = 443 failover=rr connect = 10.1.1.50:23 connect = 10.1.1.60:23

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DH not working, although initialized correctly
by Ovidiu Lixandru 14 Apr '14

14 Apr '14

Hello, I'm trying to enable Forward Secrecy. have an stunnel 4.56 instance compiled with authpriv and xforwardedfor patches, configured as follows: sslVersion = all options = NO_SSLv2 ciphers = ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4 renegotiation = no setuid = nobody setgid = nobody socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 libwrap = no TIMEOUTbusy = 120 xforwardedfor = yes [domain.com] accept = X.X.X.X:443 connect = 127.0.0.1:91 cert = /etc/pki/tls/certs/domain.pem key = /etc/pki/tls/private/domain.key domain.pem contains both the SSL certificate and the DH parameters (generated with "openssl dhparams 2048"). stunnel initializes the DH parameters correctly: 2014.04.14 12:08:18 LOG6[16629:140355580176320]: Initializing service [domain.com] 2014.04.14 12:08:18 LOG7[16629:140355580176320]: Certificate: /etc/pki/tls/certs/domain.pem 2014.04.14 12:08:18 LOG7[16629:140355580176320]: Certificate loaded 2014.04.14 12:08:18 LOG7[16629:140355580176320]: Key file: /etc/pki/tls/private/domain.key 2014.04.14 12:08:18 LOG7[16629:140355580176320]: Private key loaded 2014.04.14 12:08:18 LOG7[16629:140355580176320]: Using DH parameters from /etc/pki/tls/certs/domain.pem 2014.04.14 12:08:18 LOG7[16629:140355580176320]: DH initialized with 2048-bit key 2014.04.14 12:08:18 LOG7[16629:140355580176320]: SSL options set: 0x01000004 When I try to connect using openssl s_client, the connections fails with it unable to negotiate a cipher. On the client side: # openssl s_client -cipher ECDH -tls1 -connect www.domain.com:443 CONNECTED(00000003) 140735113126752:error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure:s3_pkt.c:1256:SSL alert number 40 140735113126752:error:1409E0E5:SSL routines:SSL3_WRITE_BYTES:ssl handshake failure:s3_pkt.c:596: --- no peer certificate available --- No client certificate CA names sent --- SSL handshake has read 7 bytes and written 0 bytes --- New, (NONE), Cipher is (NONE) Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE SSL-Session: Protocol : TLSv1 Cipher : 0000 Session-ID: Session-ID-ctx: Master-Key: Key-Arg : None PSK identity: None PSK identity hint: None SRP username: None Start Time: 1397471905 Timeout : 7200 (sec) Verify return code: 0 (ok) --- On the server side: 2014.04.14 11:57:10 LOG5[9647:140038728394496]: Service [domain.com] accepted connection from X.X.X.X:56678 2014.04.14 11:57:10 LOG7[9647:140038728394496]: SSL state (accept): before/accept initialization 2014.04.14 11:57:10 LOG7[9647:140038728394496]: SNI: no virtual services defined 2014.04.14 11:57:10 LOG7[9647:140038728394496]: SSL alert (write): fatal: handshake failure 2014.04.14 11:57:10 LOG3[9647:140038728394496]: SSL_accept: 1408A0C1: error:1408A0C1:SSL routines:SSL3_GET_CLIENT_HELLO:no shared cipher 2014.04.14 11:57:10 LOG5[9647:140038728394496]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket The client and the server have the same openssl version (1.0.1e), with the same supported ciphers. I tried different cipher combinations (i.e. "HIGH:!aNULL:!MD5"), but no lock. FWIW, the initial DH cipher list in the stunnel config file works correctly in an SSL nginx instance and openssl s_client negotiates "ECDHE-RSA-AES256-SHA". Any idea what may be wrong with stunnel? Thanks, Ovidiu

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Re: [stunnel-users] Some troubles with PROXY protocol
by Alexey V. Drozdov 13 Apr '14

13 Apr '14

Hi, Mike! In spite of new changes, it's still work incorrect because of init_remote(c) connect to the address from root config section: protocol(c, PROTOCOL_PRE_CONNECT); init_remote(c); <<<<<<<<<< destination address from root section protocol(c, PROTOCOL_PRE_SSL); init_ssl(c); <<<<<<<<<<< switch to target SNI config section only there protocol(c, PROTOCOL_POST_SSL); <<<<<<<<<<< send PROXY protocol to incorrect address Context switch to target section parameters after init_ssl(c) only. /Alexey V. Drozdov e-mail: anyquist(a)yandex.ru

2 2

Connection closed with a turn server backend
by pablo platt 12 Apr '14

12 Apr '14

Hi, I'm trying to tunnel TLS connection to a turn server https://code.google.com/p/rfc5766-turn-server/ The connection is closed with; SSL socket closed on SSL_read I'm using the ubuntu 12.04 package http://packages.ubuntu.com/precise/stunnel4 Am I missing a configuration option in my stunnel config? Please see my config and log bellow. ----------------------------------------------- chroot = /var/lib/stunnel4/ setuid = stunnel4 setgid = stunnel4 pid = /stunnel4.pid debug = 7 output = /stunnel.log [ssl] accept = 443 connect = 3478 cert = /etc/stunnel/cert.pem key = /etc/stunnel/key.pem ---------------------------------------------------- 2014.04.12 13:40:15 LOG7[14983:140499885700864]: No limit detected for the number of clients 2014.04.12 13:40:15 LOG7[14983:140499885700864]: signal_pipe: FD=3 allocated (non-blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: signal_pipe: FD=4 allocated (non-blocking mode) 2014.04.12 13:40:15 LOG5[14983:140499885700864]: stunnel 4.42 on x86_64-pc-linux-gnu platform 2014.04.12 13:40:15 LOG5[14983:140499885700864]: Compiled/running with OpenSSL 1.0.1 14 Mar 2012 2014.04.12 13:40:15 LOG5[14983:140499885700864]: Threading:PTHREAD SSL:ENGINE Auth:LIBWRAP Sockets:POLL,IPv6 2014.04.12 13:40:15 LOG5[14983:140499885700864]: Reading configuration from file /etc/stunnel/stunnel.conf 2014.04.12 13:40:15 LOG7[14983:140499885700864]: PRNG seeded successfully 2014.04.12 13:40:15 LOG6[14983:140499885700864]: Initializing SSL context for service ssl 2014.04.12 13:40:15 LOG4[14983:140499885700864]: Insecure file permissions on /etc/stunnel/key.pem 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Certificate: /etc/stunnel/cert.pem 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Certificate loaded 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Key file: /etc/stunnel/key.pem 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Private key loaded 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Could not load DH parameters from /etc/stunnel/cert.pem 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Using hardcoded DH parameters 2014.04.12 13:40:15 LOG7[14983:140499885700864]: DH initialized with 2048-bit key 2014.04.12 13:40:15 LOG7[14983:140499885700864]: ECDH initialized with curve prime256v1 2014.04.12 13:40:15 LOG7[14983:140499885700864]: SSL options set: 0x00000004 2014.04.12 13:40:15 LOG6[14983:140499885700864]: SSL context initialized 2014.04.12 13:40:15 LOG5[14983:140499885700864]: Configuration successful 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=5 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=6 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=6 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=7 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=7 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=8 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=8 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=9 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=9 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: libwrap_init: FD=10 allocated (blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: accept socket: FD=11 allocated (non-blocking mode) 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Option SO_REUSEADDR set on accept socket 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Service ssl bound to 0.0.0.0:443 2014.04.12 13:40:15 LOG7[14983:140499885700864]: Service ssl opened FD=11 2014.04.12 13:40:15 LOG7[14989:140499885700864]: Created pid file /stunnel4.pid 2014.04.12 13:40:17 LOG7[14989:140499885700864]: local socket: FD=0 allocated (non-blocking mode) 2014.04.12 13:40:17 LOG7[14989:140499885700864]: Service ssl accepted FD=0 from 192.168.56.1:54561 2014.04.12 13:40:17 LOG7[14989:140499885700864]: local socket: FD=1 allocated (non-blocking mode) 2014.04.12 13:40:17 LOG7[14989:140499885700864]: Service ssl accepted FD=1 from 192.168.56.1:54562 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl started 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Option TCP_NODELAY set on local socket 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Waiting for a libwrap process 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Acquired libwrap process #0 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl started 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Option TCP_NODELAY set on local socket 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Waiting for a libwrap process 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Acquired libwrap process #1 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Releasing libwrap process #0 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Released libwrap process #0 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl permitted by libwrap from 192.168.56.1:54562 2014.04.12 13:40:17 LOG5[14989:140499885692672]: Service ssl accepted connection from 192.168.56.1:54562 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): before/accept initialization 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read client hello A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write server hello A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write certificate A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write key exchange A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write server done A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 flush data 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Releasing libwrap process #1 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Released libwrap process #1 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl permitted by libwrap from 192.168.56.1:54561 2014.04.12 13:40:17 LOG5[14989:140499885790976]: Service ssl accepted connection from 192.168.56.1:54561 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): before/accept initialization 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read client hello A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write server hello A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write certificate A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write key exchange A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write server done A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 flush data 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read client key exchange A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 read finished A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write session ticket A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write change cipher spec A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 write finished A 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL state (accept): SSLv3 flush data 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 items in the session cache 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 client connects (SSL_connect()) 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 client connects that finished 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 client renegotiations requested 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 2 server connects (SSL_accept()) 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 1 server connects that finished 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 server renegotiations requested 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 session cache hits 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 external session cache hits 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 session cache misses 2014.04.12 13:40:17 LOG7[14989:140499885692672]: 0 session cache timeouts 2014.04.12 13:40:17 LOG6[14989:140499885692672]: SSL accepted: new session negotiated 2014.04.12 13:40:17 LOG6[14989:140499885692672]: Negotiated ciphers: ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD 2014.04.12 13:40:17 LOG7[14989:140499885692672]: remote socket: FD=2 allocated (non-blocking mode) 2014.04.12 13:40:17 LOG6[14989:140499885692672]: connect_blocking: connecting 192.169.56.300:3478 2014.04.12 13:40:17 LOG7[14989:140499885692672]: connect_blocking: s_poll_wait 192.169.56.300:3478: waiting 10 seconds 2014.04.12 13:40:17 LOG5[14989:140499885692672]: connect_blocking: connected 192.169.56.300:3478 2014.04.12 13:40:17 LOG5[14989:140499885692672]: Service ssl connected remote server from 192.169.56.300:59744 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Remote FD=2 initialized 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Option TCP_NODELAY set on remote socket 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read client key exchange A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 read finished A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write session ticket A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write change cipher spec A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 write finished A 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL state (accept): SSLv3 flush data 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 items in the session cache 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 client connects (SSL_connect()) 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 client connects that finished 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 client renegotiations requested 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 2 server connects (SSL_accept()) 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 2 server connects that finished 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 server renegotiations requested 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 session cache hits 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 external session cache hits 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 session cache misses 2014.04.12 13:40:17 LOG7[14989:140499885790976]: 0 session cache timeouts 2014.04.12 13:40:17 LOG6[14989:140499885790976]: SSL accepted: new session negotiated 2014.04.12 13:40:17 LOG6[14989:140499885790976]: Negotiated ciphers: ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD 2014.04.12 13:40:17 LOG7[14989:140499885692672]: SSL socket closed on SSL_read 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Sending socket write shutdown 2014.04.12 13:40:17 LOG5[14989:140499885692672]: Connection closed: 0 bytes sent to SSL, 0 bytes sent to socket 2014.04.12 13:40:17 LOG7[14989:140499885692672]: Service ssl finished (1 left) 2014.04.12 13:40:17 LOG7[14989:140499885692672]: str_stats: 0 block(s), 0 byte(s) 2014.04.12 13:40:17 LOG7[14989:140499885790976]: remote socket: FD=1 allocated (non-blocking mode) 2014.04.12 13:40:17 LOG6[14989:140499885790976]: connect_blocking: connecting 192.169.56.300:3478 2014.04.12 13:40:17 LOG7[14989:140499885790976]: connect_blocking: s_poll_wait 192.169.56.300:3478: waiting 10 seconds 2014.04.12 13:40:17 LOG5[14989:140499885790976]: connect_blocking: connected 192.169.56.300:3478 2014.04.12 13:40:17 LOG5[14989:140499885790976]: Service ssl connected remote server from 192.169.56.300:59745 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Remote FD=1 initialized 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Option TCP_NODELAY set on remote socket 2014.04.12 13:40:17 LOG7[14989:140499885790976]: SSL socket closed on SSL_read 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Sending socket write shutdown 2014.04.12 13:40:17 LOG5[14989:140499885790976]: Connection closed: 0 bytes sent to SSL, 0 bytes sent to socket 2014.04.12 13:40:17 LOG7[14989:140499885790976]: Service ssl finished (0 left) 2014.04.12 13:40:17 LOG7[14989:140499885790976]: str_stats: 0 block(s), 0 byte(s)

1 0

Bleedingheart Bug in OpenSSL
by Burak Say 11 Apr '14

11 Apr '14

Hello, When do you think you can release a patch to use OpenSSL 1.0.1g instead of 1.0.1f? Thanks, Burak Say

4 5

Re: [stunnel-users] Some troubles with PROXY protocol
by Alexey V. Drozdov 10 Apr '14

10 Apr '14

Hi, Mike! I have analyze your fix and found mistake :( We will switch to target SNI section after init_ssl(c) only, thereby init_remote(c) will be connect to wrong destination. if(!c->opt->option.client && c->opt->protocol<0 #ifndef OPENSSL_NO_TLSEXT && !c->opt->servername_list_head #endif ) { /* server mode and no protocol negotiation needed */ init_ssl(c); init_remote(c); } else { /* client mode or protocol negotiation enabled */ protocol(c, PROTOCOL_PRE_CONNECT); init_remote(c); <<<<<<<<<< Incorrect destination protocol(c, PROTOCOL_PRE_SSL); init_ssl(c); <<<<<<<<<<< switch to target SNI config section only there protocol(c, PROTOCOL_POST_SSL); } /Alexey V. Drozdov e-mail: anyquist(a)yandex.ru

2 1

stunnel 5.01 released
by Michal Trojnara 08 Apr '14

08 Apr '14

Dear Users, I have released version 5.01 of stunnel. The ChangeLog entry: Version 5.01, 2014.04.08, urgency: HIGH: * Security bugfixes - OpenSSL DLLs updated to version 1.0.1g. This version mitigates TLS heartbeat read overrun (CVE-2014-0160). * New features - X.509 extensions added to the created self-signed stunnel.pem. - "FIPS = no" also allowed in non-FIPS builds of stunnel. - Search all certificates with the same subject name for a matching public key rather than only the first one (thx to Leon Winter). - Create logs in the local application data folder if stunnel folder is not writable on Win32. * Bugfixes - close_notify not sent when SSL still has some data buffered. - Protocol negotiation with server-side SNI fixed. - A Mac OS X missing symbols fixed. - Win32 configuration file reload crash fixed. - Added s_pool_free() on exec+connect service retires. - Line-buffering enforced on stderr output. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hash for stunnel-5.01.tar.gz: 2565bf58ffe8a612304c64df621105b2e42d6e389e815ed4205dbeec4f3f886b Best regards, Mike

1 0

Re: [stunnel-users] public domain [Patch] Support multiple X509 client certificates with same CN
by Leon Winter 01 Apr '14

01 Apr '14

Hi Michal, > >What license do you need the patch to be? > > Preferably public domain, but any GPL-compatbile and non-copyleft license > should be fine. I hereby release my patches to stunnel for support of muliple client certificates with the same CN into the public domain. Best regards, Leon Winter

2 2

Some troubles with PROXY protocol
by Alexey V. Drozdov 31 Mar '14

31 Mar '14

Hi, I try to use PROXY protocol ability for my virtual server, but this options work for root section only. E.g. it not work for this simple case: [virtual_server] accept = 443 connect = localhost:1081 cert = /etc/stunnel/serverCA.crt key = /etc/stunnel/serverCA.key verify = 2 CAfile = /etc/stunnel/serverCA.crt [server_ru] sni = virtual_server:server.ru cert = /etc/stunnel/server.cer key = /etc/stunnel/server.pem connect = localhost:7000 protocol = proxy <-- option don not work there This problem exist due some code bug: NOEXPORT void client_try(CLI *c) { init_local(c); if(!c->opt->option.client && c->opt->protocol<0) // <-- condition is true in spite of setup protorol=proxy { init_ssl(c); // we'll switch to target section (c->opt) there only! init_remote(c); } else { protocol(c, PROTOCOL_PRE_CONNECT); init_remote(c); protocol(c, PROTOCOL_PRE_SSL); init_ssl(c); protocol(c, PROTOCOL_POST_SSL); } ... Simple adhoc solution work for me: if(!c->opt->option.client && c->opt->protocol<0) // <-- condition is true in spite of setup protorol=proxy { init_ssl(c); init_remote(c); // force initiate PROXY protocol protocol(c, PROTOCOL_PRE_SSL); } It's crutch and not general solution certain. But some code refactoring needs for more correct fix. I think that this bug will be fixed in future versions. Thanks for stunnel! :) /Alexey V. Drozdov e-mail: anyquist(a)yandex.ru

2 1

Build failure of stunned 5.00 under OS X.
by Marius Schamschula 28 Mar '14

28 Mar '14

Hi there, After having built many prior releases of stunned for OS X, I ran into the following issue with version 5.0: /bin/sh ../libtool --tag=CC --mode=link gcc -pthread -fstack-protector -fPIE -g -O2 -Wall -Wextra -Wno-long-long -pedantic -L/usr/local/ssl/lib64 -L/usr/local/ssl/lib -lssl -lcrypto -o stunnel stunnel-str.o stunnel-file.o stunnel-client.o stunnel-log.o stunnel-options.o stunnel-protocol.o stunnel-network.o stunnel-resolver.o stunnel-ssl.o stunnel-ctx.o stunnel-verify.o stunnel-sthreads.o stunnel-fd.o stunnel-stunnel.o stunnel-pty.o stunnel-libwrap.o stunnel-ui_unix.o -lz -lpthread -lwrap libtool: link: gcc -pthread -fstack-protector -fPIE -g -O2 -Wall -Wextra -Wno-long-long -pedantic -o stunnel stunnel-str.o stunnel-file.o stunnel-client.o stunnel-log.o stunnel-options.o stunnel-protocol.o stunnel-network.o stunnel-resolver.o stunnel-ssl.o stunnel-ctx.o stunnel-verify.o stunnel-sthreads.o stunnel-fd.o stunnel-stunnel.o stunnel-pty.o stunnel-libwrap.o stunnel-ui_unix.o -L/usr/local/ssl/lib64 -L/usr/local/ssl/lib -lssl -lcrypto -lz -lpthread -lwrap -pthread ld: warning: directory not found for option '-L/usr/local/ssl/lib64' Undefined symbols for architecture x86_64: "_load_icon_default", referenced from: _parse_global_option in stunnel-options.o "_load_icon_file", referenced from: _parse_global_option in stunnel-options.o ld: symbol(s) not found for architecture x86_64 collect2: ld returned 1 exit status he ewxat same issue under 10.8 and 10.9. Makefile:471: recipe for target 'stunnel' failed make[2]: *** [stunnel] Error 1 make[2]: Leaving directory '/private/tmp/stunnel-5.00/src' Makefile:339: recipe for target 'all' failed make[1]: *** [all] Error 2 make[1]: Leaving directory '/private/tmp/stunnel-5.00/src' Makefile:365: recipe for target 'all-recursive' failed make: *** [all-recursive] Error 1 This is the OS X 10.7 build, but I had the same issue under 10.8 and 10.9. Marius -- Marius Schamschula

1 0

Access to Packet Content
by Michael Carlino (RIT Student) 26 Mar '14

26 Mar '14

Hello stunnel users, I am working with what seems to be the standard stunnel HTTPS configuration. I have two instances of stunnel, one as a client and one as a server. The client accepts connections from a browser. The server sits in front of tomcat. If works like a charm (of course!). What I need to do seems simple, and I will try to keep my description of it generic. In the client stunnel I need to make a small change to the HTTP packet. I need to add some data to it. At the server side I need to access that added data. The server stunnel may close the SSL session based on that data. So, my question is: can I obtain access to the packet before it's encrypted and sent out over SSL? Can I get access to the decrypted packet before it's sent on to tomcat? I know that as a proxy stunnel has to be and tries to be general in nature. I am not concerned (right now) with developing a feature that will become available to others later. I don't mind if my changes make my development version of stunnel single-purpose. My work is academic and proof-of-concept in it's nature. I have collected references and a text book (Network Security with OpenSSL by Viega et al). I will continue to walk through and explore the code. Are there any programmer resources I can obtain? I see the occasional URL in the stunnel source code. I will have to check these URLs. --- I just now pursued http://haproxy.1wt.eu/download/1.5/doc/proxy-protocol.txt, and I see that there is a patch that allows stunnel to do an initial modification to the HTTP request to insert a X-Forwarded-For header. This sounds like what I need to do! I am going to look for that patch. I hope the source code for the patch is available. Please, if anyone has any advice, war stories, criticism, whatever... I would very much appreciate it. Regards.

4 8

Tool Information
by "Cortenai Swoboda Reinbrecht" 14 Mar '14

14 Mar '14

1 0

stunnel.cnf should set keyUsage = keyCertSign
by Athir Nuaimi 11 Mar '14

11 Mar '14

I'm trying to write a go program to connect to an stunnel server and verify the certificate but it fails because the go language requires that self-signed certs have keyCertSign set in the keyUsages. the default stunnel.cnf does not set this. According to the following message thread this is required by RFC 5280. https://groups.google.com/forum/#!msg/golang-nuts/LfLHjVkeSj8/YyP-LSPEytEJ The solution to this is to add 'keyUsage = keyCertSign' to the stunnel.cnf.

3 3

Please allow fips=no even if !USE_FIPS
by Andy Lutomirski 10 Mar '14

10 Mar '14

It's currently impossible to make a stunnel config file that works with reasonable settings on both a USE_FIPS build (e.g. Fedora) and a !USE_FIPS build (e.g. Ubuntu). This is because, if USE_FIPS, fips defaults to "yes" (which is, for most purposes, a serious problem) and, if !USE_FIPS, the setting 'fips=no' prevents stunnel from starting. I've observed this on stunnel 4.53, and it looks like the same issue exists in the source in stunnel 4.56 and 5.00. (Note that, if targetting stunnel 5.00, this is less of an issue, since the default value of 'fips' changed. Nonetheless, it would be nice to accept 'fips=no' to avoid surprises.) Thanks, Andy

1 0

Stunnel Install error on Solaris10 X86
by Ashok Kumar G 10 Mar '14

10 Mar '14

Hi, I am trying to install stunnel-4.56 on my Solaris10 server. configure step completed successfully. But make and make install commands failed miserably. # gzip -dc stunnel-3.8.tar.gz | tar -xvf - # cd stunnel-3.8 # ./configure bash-3.00# make bash: make: command not found bash-3.00# export PATH=/usr/ccs/bin bash-3.00# make bash: line 8: sed: command not found *** Error code 127 The following command caused the error: fail= failcom='exit 1'; \ for f in x $MAKEFLAGS; do \ case $f in \ *=* | --[!k]*);; \ *k*) failcom='fail=yes';; \ esac; \ done; \ dot_seen=no; \ target=`echo all-recursive | sed s/-recursive//`; \ list='src doc tools'; for subdir in $list; do \ echo "Making $target in $subdir"; \ if test "$subdir" = "."; then \ dot_seen=yes; \ local_target="$target-am"; \ else \ local_target="$target"; \ fi; \ (CDPATH="${ZSH_VERSION+.}:" && cd $subdir && make $local_target) \ || eval $failcom; \ done; \ if test "$dot_seen" = "no"; then \ make "$target-am" || exit 1; \ fi; test -z "$fail" make: Fatal error: Command failed for target `all-recursive' bash-3.00# make install bash: line 8: sed: command not found *** Error code 127 The following command caused the error: fail= failcom='exit 1'; \ for f in x $MAKEFLAGS; do \ case $f in \ *=* | --[!k]*);; \ *k*) failcom='fail=yes';; \ esac; \ done; \ dot_seen=no; \ target=`echo install-recursive | sed s/-recursive//`; \ list='src doc tools'; for subdir in $list; do \ echo "Making $target in $subdir"; \ if test "$subdir" = "."; then \ dot_seen=yes; \ local_target="$target-am"; \ else \ local_target="$target"; \ fi; \ (CDPATH="${ZSH_VERSION+.}:" && cd $subdir && make $local_target) \ || eval $failcom; \ done; \ if test "$dot_seen" = "no"; then \ make "$target-am" || exit 1; \ fi; test -z "$fail" make: Fatal error: Command failed for target `install-recursive' bash-3.00# bash-3.00# bash-3.00# echo $PATH /usr/ccs/bin ========================================================= * 2nd Try:* ========================================================= bash-3.00# echo $PATH /usr/sbin:/usr/bin bash-3.00# PATH=$PATH:/usr/sbin:/usr/sfw/bin:/usr/ccs/bin bash-3.00# LD_LIBARAY_PATH=/lib:/usr/lib:/usr/local/lib bash-3.00# cd /opt/softwares/stunnel-4.56 bash-3.00# make Making all in src make all-am Making all in doc Making all in tools bash-3.00# make install Making install in src test -z "/usr/local/bin" || ../auto/install-sh -c -d "/usr/local/bin" /bin/bash ../libtool --mode=install ../auto/install-sh -c stunnel '/usr/local/bin' libtool: install: ../auto/install-sh -c stunnel /usr/local/bin/stunnel test -z "/usr/local/bin" || ../auto/install-sh -c -d "/usr/local/bin" ../auto/install-sh -c stunnel3 '/usr/local/bin' test -z "/usr/local/lib/stunnel" || ../auto/install-sh -c -d "/usr/local/lib/stunnel" /bin/bash ../libtool --mode=install ../auto/install-sh -c libstunnel.la'/usr/local/lib/stunnel' libtool: install: ../auto/install-sh -c .libs/libstunnel.so /usr/local/lib/stunnel/libstunnel.so libtool: install: chmod +x /usr/local/lib/stunnel/libstunnel.so libtool: install: ../auto/install-sh -c .libs/libstunnel.lai /usr/local/lib/stunnel/libstunnel.la ---------------------------------------------------------------------- Libraries have been installed in: /usr/local/lib/stunnel If you ever happen to want to link against installed libraries in a given directory, LIBDIR, you must either use libtool, and specify the full pathname of the library, or use the `-LLIBDIR' flag during linking and do at least one of the following: - add LIBDIR to the `LD_LIBRARY_PATH' environment variable during execution - use the `-RLIBDIR' linker flag See any operating system documentation about shared libraries for more information, such as the ld(1) and ld.so(8) manual pages. ---------------------------------------------------------------------- Making install in doc test -z "/usr/local/share/doc/stunnel" || ../auto/install-sh -c -d "/usr/local/share/doc/stunnel" ../auto/install-sh -c -m 644 stunnel.html stunnel.pl.html stunnel.fr.html '/usr/local/share/doc/stunnel' test -z "/usr/local/share/man/man8" || ../auto/install-sh -c -d "/usr/local/share/man/man8" ../auto/install-sh -c -m 644 stunnel.8 stunnel.pl.8 stunnel.fr.8 '/usr/local/share/man/man8' Making install in tools test -z "/usr/local/etc/stunnel" || ../auto/install-sh -c -d "/usr/local/etc/stunnel" ../auto/install-sh -c -m 644 stunnel.conf-sample '/usr/local/etc/stunnel' if test ! -r /usr/local/etc/stunnel/stunnel.pem; then \ if test -r "/dev/urandom"; then \ dd if="/dev/urandom" of=stunnel.rnd bs=256 count=1; \ RND="-rand stunnel.rnd"; \ else \ RND=""; \ fi; \ /usr//bin/openssl req -new -x509 -days 365 $RND \ -config ./stunnel.cnf \ -out stunnel.pem -keyout stunnel.pem; \ /usr//bin/openssl gendh $RND 1024 >> stunnel.pem; \ /usr//bin/openssl x509 -subject -dates -fingerprint -noout -in stunnel.pem; \ ../auto/install-sh -c -m 600 stunnel.pem /usr/local/etc/stunnel/stunnel.pem; \ rm stunnel.pem; \ fi 1+0 records in 1+0 records out bash: line 7: /usr//bin/openssl: No such file or directory *** Error code 1 make: Fatal error: Command failed for target `install-data-local' Current working directory /opt/softwares/stunnel-4.56/tools *** Error code 1 The following command caused the error: make install-exec-am install-data-am make: Fatal error: Command failed for target `install-am' Current working directory /opt/softwares/stunnel-4.56/tools *** Error code 1 The following command caused the error: fail= failcom='exit 1'; \ for f in x $MAKEFLAGS; do \ case $f in \ *=* | --[!k]*);; \ *k*) failcom='fail=yes';; \ esac; \ done; \ dot_seen=no; \ target=`echo install-recursive | sed s/-recursive//`; \ list='src doc tools'; for subdir in $list; do \ echo "Making $target in $subdir"; \ if test "$subdir" = "."; then \ dot_seen=yes; \ local_target="$target-am"; \ else \ local_target="$target"; \ fi; \ (CDPATH="${ZSH_VERSION+.}:" && cd $subdir && make $local_target) \ || eval $failcom; \ done; \ if test "$dot_seen" = "no"; then \ make "$target-am" || exit 1; \ fi; test -z "$fail" make: Fatal error: Command failed for target `install-recursive' bash-3.00# Can someone please help to resolve the above error. Thanks, Ashok Kumar G

2 3

Re: [stunnel-users] [Patch] Support multiple X509 client certificates with same CN
by Leon Winter 10 Mar '14

10 Mar '14

On Mon, Mar 10, 2014 at 06:34:14AM -0400, Brian Wilkins wrote: > You will have to attach appropriate software license as well. Michal may > ask for it I hereby declare my two previously sent patches to be licensed under GPL as according to the license of the stunnel project. Regards, Leon Winter

1 0

[Patch] Support multiple X509 client certificates with same CN
by Leon Winter 10 Mar '14

10 Mar '14

Hi, currently stunnel uses the X509_STORE_get_by_subject () API call to OpenSSL to retrieve the x509 client certificate in the cert_check () method (located in verify.c) to gather the client certificate from the whitelist by the common name (CN) the client presented during the TLS handshake. It then proceeds to compare both certificates bit by bit. This all works rather fine until the very moment you have more than one client certificate with the same CN. The OpenSSL API call will then return any of the certificates with the provided CN (according to internal logic). Other implementations using OpenSSL were aware of this issue and introduced logic to further iterate over the remaining certificates, retrieving any further with the same CN. See for example function X509_STORE_CTX_get1_issuer () and its comment: http://www.opensource.apple.com/source/OpenSSL/OpenSSL-12/openssl/crypto/x5… I patched stunnel 4.53 and adapted the patch to upstream version 5.00 to behave in similar fashion and can report that with these changes stunnel then also supports multiple client certificates sharing the same CN. Feel free to adapt indention as my patches aim for minimal changed lines. Best regards, Leon Winter

1 0

stunnel 5.00 released
by Michal Trojnara 10 Mar '14

10 Mar '14

Dear Users, I have released version 5.00 of stunnel. The ChangeLog entry: stunnel 5.00 disables some features previously enabled by default. Users should review whether the new defaults are appropriate for their particular deployments. Packages maintainers may consider prepending the old defaults for "fips" (if supported by their OpenSSL library), "pid" and "libwrap" to stunnel.conf during automated updates. Version 5.00, 2014.03.06, urgency: HIGH: * Security bugfixes - Added PRNG state update in fork threading (CVE-2014-0016). * New global configuration file defaults - Default "fips" option value is now "no", as FIPS mode is only helpful for compliance, and never for actual security. - Default "pid" is now "", i.e. not to create a pid file at startup. * New service-level configuration file defaults - Default "ciphers" updated to "HIGH:MEDIUM:+3DES:+DH:!aNULL:!SSLv2" due to AlFBPPS attack and bad performance of DH ciphersuites. - Default "libwrap" setting is now "no" to improve performance. * New features - OpenSSL DLLs updated to version 1.0.1f. - zlib DLL updated to version 1.2.8. - autoconf scripts upgraded to version 2.69. - TLS 1.1 and TLS 1.2 are now allowed in the FIPS mode. - New service-level option "redirect" to redirect SSL client connections on authentication failures instead of rejecting them. - New global "engineDefault" configuration file option to control which OpenSSL tasks are delegated to the current engine. Available tasks: ALL, RSA, DSA, ECDH, ECDSA, DH, RAND, CIPHERS, DIGESTS, PKEY, PKEY_CRYPTO, PKEY_ASN1. - New service-level configuration file option "engineId" to select the engine by identifier, e.g. "engineId = capi". - New global configuration file option "log" to control whether to append (the default), or to overwrite log file while (re)opening. - Different taskbar icon colors to indicate the service state. - New global configuration file options "iconIdle", "iconActive", and "iconError" to select status icon on GUI taskbar. - Removed the limit of 63 stunnel.conf sections on Win32 platform. - Installation of a sample certificate was moved to a separate "cert" target in order to allow unattended (e.g. scripted) installations. - Reduced length of the logged thread identifier. It is still based on the OS thread ID, and thus not unique over long periods of time. - Improved readability of error messages printed when stunnel refuses to start due to a critical error. * Bugfixes - LD_PRELOAD Solaris compatibility bug fixed (thx to Norm Jacobs). - CRYPTO_NUM_LOCKS replaced with CRYPTO_num_locks() to improve binary compatibility with diverse builds of OpenSSL (thx to Norm Jacobs). - Corrected round-robin failover behavior under heavy load. - Numerous fixes in the engine support code. - On Win32 platform .rnd file moved from c:\ to the stunnel folder. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hash for stunnel-5.00.tar.gz: 88986d52a7ef1aff0cc26fc0a9830361c991baba7ee591d5cf1cc8baef75bc13 Best regards, Mike

3 5