- stunnel-users - stunnel.org

Peer suddenly disconnected
by victor.harutyunyan＠arca.am 02 Jul '08

02 Jul '08

Hello there, I have installed stunnel server on FreeBSD. I configure it like this cert=server_cert.pem key=private\server_key.pem socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 debug = 7 verify=2 CAfile=test_cert.pem [ssl_host_proxy] accept=172.24.150.15:1234 connect=192.168.1.1:10500 TIMEOUTidle=120 Client side is not a computer it's small device. I generate client certificates in this manor: echo off del test_ck.pem /q # delete previous test.ck.pem file echo Starting New test_ck file Generation C:\OpenSSL\bin\openssl.exe req -new -x509 -newkey rsa:2048 -sha1 -out test_cert.pem -keyout test_key.pem -nodes -config sample_ck.cnf -days 1825 -batch C:\OpenSSL\bin\openssl.exe pkcs8 -in test_key.pem -topk8 -out test_pk8.pem -passout pass:"TestPassword0001" -noiter -v1 PBE-SHA1-3DES del test_key.pem /q copy test_cert.pem+test_pk8.pem test_ck.pem /y del test_pk8.pem /q Echo New test_ck.pem file has the following sections: findstr "BEGIN END" test_ck.pem pause test_cert.pem is on a stunnel server as CAfile and test_ck.pem is on my small device which is capable to connect via stunnel. And I generate other self-signed CA, and generate one certificate request and sign it via this CA, and install that key and certificate on server. cert=server_cert.pem key=private\server_key.pem All is working fine, but after one year my server certificate has expired, when I regenerate new server certificate and try to connect, I see in server log this: Child process 6094 finished with code 0 SSL state (accept): before accept initialization SSL state (accept): SSLv3 read client hello A SSL state (accept): SSLv3 write server hello A SSL state (accept): SSLv3 write certificate A SSL state (accept): SSLv3 write server done A SSL state (accept): SSLv3 flush data SSL_accept: Peer suddenly disconnected And my device can't connect to the server, I haven't any client side logs and error messages, only NOT DELIVERED in my device. :( Can you please help me to solve this problem, I am trying many many times, I was very angry.. Thank you very much. Victor Harutyunyan. P.S. Sorry for my bad english.

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Peer suddenly disconnected
by victor.harutyunyan＠arca.am 02 Jul '08

02 Jul '08

Hello there, I have installed stunnel server on FreeBSD. I configure it like this cert=server_cert.pem key=private\server_key.pem socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 debug = 7 verify=2 CAfile=test_cert.pem [ssl_host_proxy] accept=172.24.150.15:1234 connect=192.168.1.1:10500 TIMEOUTidle=120 Client side is not a computer it's small device. I generate client certificates in this manor: echo off del test_ck.pem /q # delete previous test.ck.pem file echo Starting New test_ck file Generation C:\OpenSSL\bin\openssl.exe req -new -x509 -newkey rsa:2048 -sha1 -out test_cert.pem -keyout test_key.pem -nodes -config sample_ck.cnf -days 1825 -batch C:\OpenSSL\bin\openssl.exe pkcs8 -in test_key.pem -topk8 -out test_pk8.pem -passout pass:"TestPassword0001" -noiter -v1 PBE-SHA1-3DES del test_key.pem /q copy test_cert.pem+test_pk8.pem test_ck.pem /y del test_pk8.pem /q Echo New test_ck.pem file has the following sections: findstr "BEGIN END" test_ck.pem pause test_cert.pem is on a stunnel server as CAfile and test_ck.pem is on my small device which is capable to connect via stunnel. And I generate other self-signed CA, and generate one certificate request and sign it via this CA, and install that key and certificate on server. cert=server_cert.pem key=private\server_key.pem All is working fine, but after one year my server certificate has expired, when I regenerate new server certificate and try to connect, I see in server log this: Child process 6094 finished with code 0 SSL state (accept): before accept initialization SSL state (accept): SSLv3 read client hello A SSL state (accept): SSLv3 write server hello A SSL state (accept): SSLv3 write certificate A SSL state (accept): SSLv3 write server done A SSL state (accept): SSLv3 flush data SSL_accept: Peer suddenly disconnected And my device can't connect to the server, I haven't any client side logs and error messages, only NOT DELIVERED in my device. :( Can you please help me to solve this problem, I am trying many many times, I was very angry.. Thank you very much. Victor Harutyunyan. P.S. Sorry for my bad english.

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socket not getting closed
by Manjunath S Karikatti 02 Jul '08

02 Jul '08

Hello, We are using stunnel to wrap the tcp connetion between the our client session used by users and the server process. Due to some reason when client session terminates abruptly (either due to user's PC crash or network outage) the stunnel process does not terminate. We see that the socket on client PC is closed but stunnel process is still alive with socket for that PC in established state. This is on AIX platform. Do not know this is issue with stunnel process or something on AIX needs to be tuned (like the tcp_keepidle value). Thanks for any info and help. Thanks and Regards, Manjunath

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Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization
by Fat Wallet 01 Jul '08

01 Jul '08

Thanks for your reply. I was hoping to see if someone have a similar issue since there was an issue with stunnel 4.20 version. Thanks, Mike ----- Original Message ---- From: Aron Griffis <agriffis(a)n01se.net> To: Fat Wallet <fat8wallet(a)yahoo.com> Cc: stunnel-users(a)mirt.net Sent: Monday, June 30, 2008 11:04:44 AM Subject: Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization Fat Wallet wrote: [Mon Jun 30 2008, 01:28:11PM EDT] > Can someone please help with this issue? This 100% cpu > utilization issue happens randomly on multiprocess cpu. strace, ltrace, build stunnel with debugging symbols and attach gdb to the spinning process, etc. Is your name really Fat Wallet?

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Stunnel v4.25 vs v4.20
by James Moe 30 Jun '08

30 Jun '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, I upgraded to v4.25 and stunnel aborts right away. v4.20 works just fine. What is protocol family 47? ====[ log file ]==== 2008.06.26 11:31:01 LOG5[282:8553]: stunnel 4.25 on i386-pc-os2-emx with OpenSSL 0.9.8h 28 May 2008 2008.06.26 11:31:01 LOG5[282:8553]: Threading: SSL:ENGINE Sockets:SELECT,IPv4 2008.06.26 11:31:01 LOG3[282:8553]: Error binding pop3.sma.com_L110-R995 to 127.0.0.1:110 2008.06.26 11:31:01 LOG3[282:8553]: bind: Address family not supported by protocol family (47) ====[ conf file ]==== socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 client = yes output = G:/c/voice/pmmdev/testcase/bin/stunnel.log verify = 0 debug = 5 cert = g:/c/voice/pmmdev/testcase/bin/sma-test.pem [pop3.sma.com_L110-R995] accept = localhost:110 connect = pop3.sma.com:995 ;# protocol = pop3 [smtpauth.earthlink.net_L6025-R587] accept = localhost:6025 connect = smtpauth.earthlink.net:587 protocol = smtp [sohnen-moe.com:L6125:R587] accept = localhost:6125 connect = sohnen-moe.com:587 protocol = smtp [smtp.sma.com_L25-R587] accept = localhost:25 connect = smtp.sma.com:587 protocol = smtp - -- jimoe (at) sohnen-moe (dot) com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (OS/2) iD8DBQFIY+DkzTcr8Prq0ZMRArW+AJ4uOJFOGyluIj52DG4cM62jMPs8NACfbug2 oVsLAXJ+fH1Raj568dGn2mM= =JSCM -----END PGP SIGNATURE-----

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Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization
by Fat Wallet 30 Jun '08

30 Jun '08

Hi, Can someone please help with this issue? This 100% cpu utilization issue happens randomly on multiprocess cpu. Thanks! ----- Original Message ---- From: Fat Wallet <fat8wallet(a)yahoo.com> To: stunnel-users(a)mirt.net Sent: Monday, June 23, 2008 10:39:16 AM Subject: Stunnel 4.21 99% cpu ultilization Hi All, I've been googling for this issue but it seems like google is not my friend at the moment. I am running Linux with 4 cpus and top command shows stunnel at 99-100% cpu. Please help. //stunnel configuration file # PID is created inside chroot jail pid = /var/run/stunnel.pid # debug debug = 7 output = /var/log/stunnel.log # Authentication stuff verify = 2 cert = /etc/stunnel/cert.pem CAfile = /etc/stunnel/ca.pem #Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 # Use it for client mode client = yes /////////// stunnel version stunnel 4.21 on i686-pc-linux-gnu with OpenSSL 0.9.7a Feb 19 2003 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = 5 pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = /etc/stunnel/stunnel.pem session = 300 seconds sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none //openssl version OpenSSL 0.9.7a Feb 19 2003 //Redhat version Red Hat Linux release 9 (Shrike) root]#cat /proc/cpuinfo | grep processor | wc -l 4 http://stunnel.mirt.net/mailman/listinfo/stunnel-users

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UPNP & Nat-PMP with Stunnel
by Dean Shavit 25 Jun '08

25 Jun '08

Stunnel works great for me, but with dynamic port forwarding, I've not been able to get it working. I suspect it's because stunnel is a bit confusing about which port to reply to... Anyone else found a way to crack this nut?

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How do I kill stunnel?
by Grant Edwards 25 Jun '08

25 Jun '08

I've got an application that starts stunnel using equivalent of a fork/exec. The stunnel process then appears to fork off multiple copies of itself. Before the application exits, it needs to stop stunnel. I send a SIGINT to the PID that was created using the fork, but only the first "master" copy terminates -- the master stunnel process doesn't terminate its children when it exits. So I end up with a bunch of "orphaned" stunnel processes. They're not zombies, they're process that are either in state R or S (runnable or sleeping). How do I tell stunnel to not only terminate, but to terminate whatever child processes it has created? -- Grant Edwards grante Yow! Zippy's brain cells at are straining to bridge visi.com synapses ...

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Stunnel config files incompatible between 4.05 and 4.21 ?
by Brian McKee 25 Jun '08

25 Jun '08

Hi All, I have a stunnel config file that works fine on an older Mandrake machine running stunnel 4.05. If I use that same config file on a new Ubuntu machine running 4.21 it just dies with "/etc/stunnel/stunnel.pem: No such file or directory" IIUC, running in client mode it doesn't need a .pem file, and I didn't create any certifcates on the Mandrake machines. Do I need to generate a cert for some reason? I've attached the config below. Brian =============================== client = yes [telnet] accept = 23 connect = some.ip.number.removed:992 [as-central] accept = 8470 connect = some.ip.number.removed:9470 [as-database] accept = 8471 connect = some.ip.number.removed:9471 [as-rmtcmd] accept = 8475 connect = some.ip.number.removed:9475

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Is the "HTTP Proxy connect" feature implemented?
by alex Wright 24 Jun '08

24 Jun '08

Hey, I'm trying to use stunnel in the following scenerio: ssh-client -> stunnel (to ssl) -> Proxy -> server(ssl to ssh). I downloaded stunnel 4.25, but I hadn't noiticed any support for this. However, in the "patches" page (http://www.stunnel.org/patches/) - three patches seem to be suitable: (connect-proxy_dunbar.patch<http://www.stunnel.org/patches/patches/connect-proxy_dunbar.patch>, connect-proxy.mwald.patch<http://www.stunnel.org/patches/patches/connect-proxy.mwald.patch>) but are for version 4.05 (whichwill probably be a pain to merge with current version). When I stumbled upon the Changelog ( http://www.stunnel.org/download/ChangeLog.txt) I noticed that version 4.15, has support for "Client mode CONNECT protocol" - which is what I need - and altough i had looked hard, I haven't found any documentation to it. So, is the above feature what I want (and if so - how do I use it?) or do I need to update the patches to the current version? Thanks in advance, Alex.

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Stunnel 4.21 99% cpu ultilization
by Fat Wallet 23 Jun '08

23 Jun '08

Hi All, I've been googling for this issue but it seems like google is not my friend at the moment. I am running Linux with 4 cpus and top command shows stunnel at 99-100% cpu. Please help. //stunnel configuration file # PID is created inside chroot jail pid = /var/run/stunnel.pid # debug debug = 7 output = /var/log/stunnel.log # Authentication stuff verify = 2 cert = /etc/stunnel/cert.pem CAfile = /etc/stunnel/ca.pem #Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 # Use it for client mode client = yes /////////// stunnel version stunnel 4.21 on i686-pc-linux-gnu with OpenSSL 0.9.7a Feb 19 2003 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = 5 pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = /etc/stunnel/stunnel.pem session = 300 seconds sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none //openssl version OpenSSL 0.9.7a Feb 19 2003 //Redhat version Red Hat Linux release 9 (Shrike) root]#cat /proc/cpuinfo | grep processor | wc -l 4 http://stunnel.mirt.net/mailman/listinfo/stunnel-users

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Using Stunnel on Vista
by John Lallemand 18 Jun '08

18 Jun '08

We have a system that needs a TN3270 client and Stunnel to connect on XP. Currently, OnNet Host/Rumba is the most popular TN3270 client in use. But when we try these programs on Vista, the connection times out. 1) Is Stunnel Vista compatible? 2) If it is, does Stunnel need specific settings to work on Vista? Thank you! ------------------------------ John Lallemand Software Release Manager University of California, Santa Cruz

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Problem with multiple stunnel jobs
by Carter Browne 17 Jun '08

17 Jun '08

A couple of days ago, I upgrade from 4.15 to 4.23 on a Linux system running Redhat 8. At the same time I went from openssl 0.9.8g to 0.9.8h. No changes were made to the configuration file. After the change, rather than starting a single process, it starts 6 processes. The process number of the lowest number process is the one that is put into the /var/run/stunnel.pid file. When I try to stop stunnel, using /etc/init.d/stunnel stop, the lowest number process is kill, and the highest number process seems to be running continuously - although it is not a hard cpu loop, but it keeps on accumulating run time. The number of processes may not be a new phenomenon, but the inability to kill itself is. I normally restart the stunnel on a daily basis to keep the log files manageable, but with this new behavior, the /etc/init.d/strunnel restart command fails because the ports are still in use. Any ideas on how to fix this problem. Thanks, Carter -- Carter Browne CBCS cbrowne(a)cbcs-usa.com 781-721-2890

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Goldmine 8 & Advisormail SSL problems
by Stephen E. Rischall 17 Jun '08

17 Jun '08

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stunnel service problems...
by Jeremy Paje 10 Jun '08

10 Jun '08

Has anyone had any problems with the windows stunnel service not starting automatically? We install stunnel as a service (stunnel.exe -install) We've had it previously installed on 600+ machines with no problems, but recently (noticed on slower machines running XP) the stunnel service does not start...but it happens randomly only on slower machines. The following errors are in the event log... Timeout (30000 milliseconds) waiting for the stunnel service to connect. (Event ID ID 7009) AND The stunnel service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion. (Event ID 7000) I've tried setting the service to restart if failed, and to delay 2 minutes before restart, etc with no luck. If you start the stunnel manually all is well, it just doesn't start on bootup. Any suggestions? Thanks JP

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Re: [stunnel-users] stunnel compatibility question
by Brian Hatch 09 Jun '08

09 Jun '08

Roughly around 2008-06-09 11:34 -0400, Patel Dippen-CDP054 kibitzed: > In this scenario, can Stunnel listen on the UDP port on the local No. Stunnel will not listen on UDP ports. Stunnel will not send UDP packets. Stunnel doesn't support UDP. -- Brian Hatch The problem is that you'd Systems and probably make something Security Engineer useful of my life that http://www.ifokr.org/bri/ I would never do. Every message PGP signed

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Fw: Re: stunnel compatibility question
by Jeffrey Buck 06 Jun '08

06 Jun '08

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Re: [stunnel-users] stunnel compatibility question
by Brian Hatch 05 Jun '08

05 Jun '08

At almost 2008-06-05 09:37 -0400, Patel Dippen-CDP054 cajoled: > I guess what I am stating is can Stunnel listen on a UDP port The answer to that question is 'no, it cannot.' -- Brian Hatch "I was looking at bringing Systems and up some new servers on Security Engineer imaginary hardware." http://www.ifokr.org/bri/ --Jason Every message PGP signed

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stunnel compatibility question
by Jeffrey Buck 04 Jun '08

04 Jun '08

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Re: [stunnel-users] stunnel compatibility question
by Brian Hatch 03 Jun '08

03 Jun '08

In the neigborhood of 2008-06-03 07:58 -0400, Patel Dippen-CDP054 argued: > Will Stunnel work for UDP data? Stunnel only accepts TCP connections. > We have traffic going into the Server on UDP and outbound from the Server on TCP. You'll want an actual VPN protocol to handle that then. Or consider using a better protocol - what you describe makes the firewalls cry. > My understanding is that OpenSSL implemented the DTLS protocol (TFC > 4347: to support UDP data) in version 0.9.8 (OpenSSL: a free and popular > implementation of TLS added support for DTLS with version 0.9.8.) Not supported in Stunnel currently. -- Brian Hatch Always yield to temptation, Systems and because it may not pass Security Engineer your way again. http://www.ifokr.org/bri/ Every message PGP signed

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Is anyone using Stunnel for tunnelling Voip?
by Errol Samuels 03 Jun '08

03 Jun '08

Hello All, I am currently researching a solution for tunnelling VoIP traffic since VoIP is blocked in the country concerned. It appears that the ISP is targeting OpenVPN and OpenSwan and blocking them so I want to try something different. My solution based on OpenVPN worked great until it got blocked by the ISP about a week ago. It was using an OpenVPN server hosted in a US Datacenter and the VPN clients were simply routers with third party Linux firmware with the OpenVPN client embedded in the firmware. I am also investigating the possibility of tunnelling OpenVPN through SSH but I have to watch my IP overheads here because the ISP watches the upload bandwidth as well! Has anyone attempted or had any success using stunnel for a similar scenario as I have mentioned? Thanks in Advance Regards, Errol

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Can I put an accept+connect pair anywhere in the conf file?
by Ben Stover 02 Jun '08

02 Jun '08

The *.conf file is divided into several sections: [imaps] .... [pop3s] .... [smtps] ..... Are these "section headers" just comments and can I put my accept+connect pair on an arbitrary place in the *.conf file (as long as they are preceeded by their own section header [foobar] ? Ben

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Connecting to mySQL from Windows
by Alistair Scott 02 Jun '08

02 Jun '08

Hi everyone I have a mySQL database that I need to connect to through SSH. I have successfully setup a connection to it using Plink. However, I'm running this from a batch file and I'd like a more elegant solution - that's where stunnel comes in I think. Rather than running a batch file, I'd like to run the connection as a Windows service - which I think this is achievable with stunnel. Trouble is, I can't work out how to do it. This is what I'm trying to achieve... Windows computer connects to mySQL server through SSH. Forwards a port to the mySQL server port 3306. Application on Windows computer connects to local forwarded port & therefore connects to the mySQL db at the remote end. I was hoping that someone could give me a pointer as to how I can set this up. Thanks in advance. Al

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stunnel 4.25 released
by Michal Trojnara 01 Jun '08

01 Jun '08

Dear Users, Version 4.25, 2008.06.01, urgency: MEDIUM: * New features - Win32 DLLs for OpenSSL 0.9.8h. * Bugfixes - Spawning libwrap processes delayed until privileges are dropped. - Compilation fix for systems without struct msghdr.msg_control. Home page/download: http://stunnel.mirt.net/ sha1sum for stunnel-4.24.tar.gz file: fc6d61fad996f750c76ea627c5dd9f789af0eaf6 Best regards, Mike

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Re: [stunnel-users] stunnel compatibility question
by Brian Hatch 30 May '08

30 May '08

Right around 2008-05-30 13:51 -0400, Patel Dippen-CDP054 suggested: > Is the true? I have a similar issue. I have never implemented SSL or > Stunnel. But, on whatever readup I have done so far, it seems Stunnel is > a tunneling protocol (IPnIP). So, you do have to have Stunnel on the > other end to extract the IP packet. Stunnel puts data inside SSL, inside TCP. Just like HTTPS is HTTP (data) inside SSL, inside TCP. You can think of the cleartext data inside the SSL tunnel for both of those examples. Yes, the data needs to be extracted from the SSL stream in both cases, but the application that gets it doesn't need to know diddly about it. > I mean if you are saying it will work, that's great news for me. It works if Stunnel is on one side and an SSL client or server is on the other side. > Our Server will have OpenSSL implementation but we plan to deploy > Stunnel on the Client machine. That's what Stunnel is for. -- Brian Hatch "Sorry, sorry, Systems and sorry, much apologizings." Security Engineer http://www.ifokr.org/bri/ Every message PGP signed

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