- stunnel-users - stunnel.org

Re: [stunnel-users] help with stunnell
by Ludolf Holzheid 28 Jul '08

28 Jul '08

On Thu, 2008-07-24 23:37:22 -0700, vinodsreehari(a)yahoo.com wrote: > [..] > > I configured stnnel in one server as server mode ,for accepting > connection on 8070 ,and connect to 80 . It works only if i specify > https://ipaddress:8070 This is because the default port for https is 443. If you'd configure stunnel to accept on port 443, `https://ipaddress' would work. > I have configured one client server also to accept connection on 80 > and redirect to teh 8070 of server. I want to know that is that teh > way its working . If there is a stunnel instance on the client machine accepting connections on port 80 and connecting to the web server at the https port (default or not), a user could specify `http://localhost' to connect to the web server (and the traffic between the client machine and the server would be secured). > And is it possible to implement the same in a live enviroment ,in > which teh webserver will run on different port ,but users dont need > to specify the port number . Yes. As soon as the destination port for the 'first hop' of a redirected/tunneled connection is the default port for the protocol in question, there is no need to specify the port number. The port numbers of 'intermediate hops' are configuration options for the two stunnel instances (in this case), so the user dosn't have to care about them. HTH, Ludolf -- --------------------------------------------------------------- Ludolf Holzheid Tel: +49 621 339960 Bihl+Wiedemann GmbH Fax: +49 621 3392239 Floßwörthstraße 41 e-mail: lholzheid(a)bihl-wiedemann.de D-68199 Mannheim, Germany ---------------------------------------------------------------

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Re: [stunnel-users] Wrong documentation
by Sandeep Kumar 25 Jul '08

25 Jul '08

On Thu, Jul 24, 2008 at 9:39 PM, Brian Hatch <bri(a)stunnel.org> wrote: > In the neigborhood of 2008-07-24 09:40 +0530, Sandeep Kumar mentioned: > > > Look at this page > http://www.stunnel.org/faq/stunnel.html#configuration_file > > In service level options section, under the explanation of "CRLpath" it > is > > said that all files in it should be of the form XXXXXXXX.0. But my > stunnnel > > setup worked only when i names as XXXXXXXX.r0 instead of XXXXXXXX.0. > > What version of openssl are you running? stunnel 4.15 with OpenSSL 0.9.8b > > > > -- > Brian Hatch "Have you asked Kirk if > Systems and he'd like the job?" > Security Engineer "You can't hide from me! > http://www.ifokr.org/bri/ I will find you. > > Every message PGP signed > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.2.1 (GNU/Linux) > > iD8DBQFIiKlFVkMj8/ymYEsRAmKxAJ9CTLp0Xi8n1VxdFup/kBUuZe6scwCfcvyu > WQG8BlfrUV8RcP31/ZUEbJk= > =EBgc > -----END PGP SIGNATURE----- > > -- Sandeep Kumar http://students.iiit.ac.in/~sandeep_kr

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Help on configuring Stunnel
by Patel Dippen-CDP054 24 Jul '08

24 Jul '08

I downloaded the pre-compiled Windows version of Stunnel (stunnel-4.25-installer.exe). We need to deploy this on 2 machines A and B. The way it works is: - B connects to A - then A connects to B How should I configure Stunnel on machine A, since, in the first case A is the Server and in the 2nd scenario A becomes the Client. Questions on deploying Stunnel on machine A: - Can I run just 1 instance of Stunnel on machine A? It seems I cannot since I have to set the "client = yes" in the 2nd scenario - Do I need to run multiple instances, 1 running as the Server and the 2nd as the Client? Here is the config file I used on the machine A: **************************** cert = stunnel.pem socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 [iPerfS] accept = 5010 connect = 127.0.0.1:5001 [iPerfS] accept = 5002 connect = 12.50.0.25:5020 **************************** Here is the config file I used on the machine B: **************************** cert = stunnel.pem socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 [iPerfC] accept = 5001 connect = 12.50.0.26:5010 [iPerfS] accept = 5020 connect = 127.0.0.1:5002 **************************** Regards, Dippen

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Stunnel 4.24 patch to allow stunnel to search for the OCSP responder within an X.509 certificate's AIA extension.
by Bruce Keats 24 Jul '08

24 Jul '08

Hi all, This patch also fixes a problem with stunnel accepting an "unknown" response as "good" and allows the connection to be setup. An OCSP responder can return one of three responses (good, revoked, unknown), however the code would accept "unknown" as good. This patch fixes that problem and treats an "unknown" response as a failure. Stunnel can query an OCSP responder to determine the revocation status of a certificate when stunnel is verifying the certificate. The code works great, however it is uses a preconfigured OCSP responder. The OCSP responder's IP/hostname is specified in the stunnel configuration file as a URI. I found this rather restrictive, so I added code to extract the OCSP responder's URI from the certificate. As per RFC 3280, one of the valid extensions for X.509 certificate is the Authority Information Access (AIA) where the "accessMethod" can be "is-ad-ocsp" to identify the OCSP responders location as per RFC2560. There can be more than one OCSP responder listed in the AIA because it is a sequence. Each location is queried in the order they appear within the certificate until either a "good" or "revoked" response is received. If an "known" response or a failure then the next OCSP responder is checked. If all OCSP responder queries result in failure then the validation also fails.. A new configuration option "OCSPaia" was added. If the "OCSPaia=yes" then the stunnel will look for the OCSP responder(s) within the certificate's AIA. The locally configured "OCSP=<url>" overrides the OCSPaia option. Bruce

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Wrong documentation
by Sandeep Kumar 24 Jul '08

24 Jul '08

Look at this page http://www.stunnel.org/faq/stunnel.html#configuration_file In service level options section, under the explanation of "CRLpath" it is said that all files in it should be of the form XXXXXXXX.0. But my stunnnel setup worked only when i names as XXXXXXXX.r0 instead of XXXXXXXX.0. -- Sandeep Kumar http://students.iiit.ac.in/~sandeep_kr

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help with stunnel port forwarding
by vinod bhasi 23 Jul '08

23 Jul '08

Hi, Please help me with stunnel port forwarding . My apache is running at port 8000 .I want this to be forwarded to 80 so that normal users dont need to specify the port number . Can anyone help me with the configuration in both client and server side .Im confused as stunnel wont run with same port used by apache. Any help will be appreciated Thanks in advancve Vinod Bhasi Did you know? You can CHAT without downloading messenger. Go to http://in.webmessenger.yahoo.com/

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Re: [stunnel-users] stunnel-users Digest, Vol 48, Issue 13
by Patrick Dung 21 Jul '08

21 Jul '08

Message: 3 Date: Mon, 21 Jul 2008 11:34:22 +0200 From: Micha? Trojnara <Michal.Trojnara(a)mobi-com.net> Subject: Re: [stunnel-users] Problem with Solaris 10u5 x86 and Stunnel 4.25 To: stunnel-users(a)mirt.net Message-ID: <2a3f79f5f6dd65f2ced02b2e9929368b(a)mirt.net> Content-Type: text/plain; charset="UTF-8" http://stunnel.mirt.net/pipermail/stunnel-users/2008-June/002021.html Mike On Sat, 19 Jul 2008 01:53:17 -0700 (PDT), Patrick Dung <patrick_dkt(a)yahoo.com.hk> wrote: > Hi > > I use this to compile stunnel: > The gcc and openssl is from Solaris SFW. > > # export CC=/usr/sfw/bin/gcc > # ./configure --with-threads=pthread --with-ssl=/usr/sfw > --localstatedir=/var > > After installing and starting stunnel, I found there are mutiple stunnel > processes. > There is a PID file which store one of the stunnel process. > I have tried to kill that PID, stunnel is bring down. > But there other stunnel processes running. > > Any ideas? > > Regards > Patrick > > > > > _______________________________________________ > stunnel-users mailing list > stunnel-users(a)mirt.net > http://stunnel.mirt.net/mailman/listinfo/stunnel-users I see. Thanks for reply. Yesterday, I have tried to compile stunnel with Sun Studio. It got problem linking with libwrap, so I turned off libwrap support. And it compile (without knowing there is a libwrap patch) and there is only one single running stunnel process. Regards Patrick

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stunnel exits silently on startup
by Luis López de Quintana 21 Jul '08

21 Jul '08

Problem: stunnel doesn't run: ldq@ldq:~$ stunnel4 /etc/stunnel.cnf ldq@ldq:~$ ps aux | grep stunnel ldq 15683 0.0 0.0 2332 1392 pts/0 S+ 11:08 0:00 man stunnel ldq 25289 0.0 0.0 1776 608 pts/1 S+ 11:59 0:00 grep stunnel stunnel.cnf: ldq@ldq:~$ cat /etc/stunnel.cnf client = yes debug = debug [nntps] accept = 127.0.0.1:1109 connect = news.giganews.com:443 Version: stunnel 4.140-5ubuntu1 libc6 ldq@ldq:~$ uname -a Linux ldq 2.6.18.5 SMP Thu May 8 01:31:23 UTC 2008 x86_64 GNU/Linux -- LdQ

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Problem with Solaris 10u5 x86 and Stunnel 4.25
by Patrick Dung 19 Jul '08

19 Jul '08

Hi I use this to compile stunnel: The gcc and openssl is from Solaris SFW. # export CC=/usr/sfw/bin/gcc # ./configure --with-threads=pthread --with-ssl=/usr/sfw --localstatedir=/var After installing and starting stunnel, I found there are mutiple stunnel processes. There is a PID file which store one of the stunnel process. I have tried to kill that PID, stunnel is bring down. But there other stunnel processes running. Any ideas? Regards Patrick

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Config Sanity Check
by Caplan, Michael 19 Jul '08

19 Jul '08

Hi There, I am working through an issue with a script that builds a socket connection to stunnel. Stunnel is being used to relay to an Apache web server. I'm building a localhost TCP connection on port 54322, and writing my HTTP data. When reading data back from the socket connection in my script I'm sometimes getting nothing, and other times getting the proper result. I can confirm that the web server is always receiving the request and returning a proper response. Wireshark shows SSL data being transmitted and received, so stunnel is doing its thing. However, the response does not seem to be relayed to my script on the other side of stunnel *sometimes*. My hunch is that I am doing something wrong with my script, but I am hoping that an stunnel guru can rule out any oddities with my stunnel setup. My config is below as well as the output of my log file. Any thoughts? Thanks! Mike cert = connector.pem debug = 7 output = c:\ssl.log ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 [registerserver] client = yes accept =54321 connect =www.int.ddx.com:443 [connector2server] client = yes accept =54322 connect =asd.int.ddx.com:443 [server2connector] accept = 54323 connect = 9000 2008.07.18 21:41:41 LOG7[13648:13748]: Snagged 64 random bytes from C:/.rnd 2008.07.18 21:41:41 LOG7[13648:13748]: Wrote 1024 new random bytes to C:/.rnd 2008.07.18 21:41:41 LOG7[13648:13748]: RAND_status claims sufficient entropy for the PRNG 2008.07.18 21:41:41 LOG7[13648:13748]: PRNG seeded successfully 2008.07.18 21:41:41 LOG7[13648:13748]: Certificate: connector.pem 2008.07.18 21:41:41 LOG7[13648:13748]: Certificate loaded 2008.07.18 21:41:41 LOG7[13648:13748]: Key file: connector.pem 2008.07.18 21:41:41 LOG7[13648:13748]: Private key loaded 2008.07.18 21:41:41 LOG7[13648:13748]: SSL context initialized for service registerserver 2008.07.18 21:41:41 LOG7[13648:13748]: Certificate: connector.pem 2008.07.18 21:41:41 LOG7[13648:13748]: Certificate loaded 2008.07.18 21:41:41 LOG7[13648:13748]: Key file: connector.pem 2008.07.18 21:41:41 LOG7[13648:13748]: Private key loaded 2008.07.18 21:41:41 LOG7[13648:13748]: SSL context initialized for service connector2server 2008.07.18 21:41:41 LOG7[13648:13748]: Certificate: connector.pem 2008.07.18 21:41:41 LOG7[13648:13748]: Certificate loaded 2008.07.18 21:41:41 LOG7[13648:13748]: Key file: connector.pem 2008.07.18 21:41:41 LOG7[13648:13748]: Private key loaded 2008.07.18 21:41:41 LOG7[13648:13748]: SSL context initialized for service server2connector 2008.07.18 21:41:41 LOG7[13648:13748]: Certificate: connector.pem 2008.07.18 21:41:41 LOG7[13648:13748]: Certificate loaded 2008.07.18 21:41:41 LOG7[13648:13748]: Key file: connector.pem 2008.07.18 21:41:41 LOG7[13648:13748]: Private key loaded 2008.07.18 21:41:41 LOG7[13648:13748]: SSL context initialized for service test 2008.07.18 21:41:41 LOG5[13648:13748]: stunnel 4.25 on x86-pc-mingw32-gnu with OpenSSL 0.9.8h 28 May 2008 2008.07.18 21:41:41 LOG5[13648:13748]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2008.07.18 21:41:46 LOG7[13476:13096]: Snagged 64 random bytes from C:/.rnd 2008.07.18 21:41:47 LOG7[13476:13096]: Wrote 1024 new random bytes to C:/.rnd 2008.07.18 21:41:47 LOG7[13476:13096]: RAND_status claims sufficient entropy for the PRNG 2008.07.18 21:41:47 LOG7[13476:13096]: PRNG seeded successfully 2008.07.18 21:41:47 LOG7[13476:13096]: Certificate: connector.pem 2008.07.18 21:41:47 LOG7[13476:13096]: Certificate loaded 2008.07.18 21:41:47 LOG7[13476:13096]: Key file: connector.pem 2008.07.18 21:41:47 LOG7[13476:13096]: Private key loaded 2008.07.18 21:41:47 LOG7[13476:13096]: SSL context initialized for service registerserver 2008.07.18 21:41:47 LOG7[13476:13096]: Certificate: connector.pem 2008.07.18 21:41:47 LOG7[13476:13096]: Certificate loaded 2008.07.18 21:41:47 LOG7[13476:13096]: Key file: connector.pem 2008.07.18 21:41:47 LOG7[13476:13096]: Private key loaded 2008.07.18 21:41:47 LOG7[13476:13096]: SSL context initialized for service connector2server 2008.07.18 21:41:47 LOG7[13476:13096]: Certificate: connector.pem 2008.07.18 21:41:47 LOG7[13476:13096]: Certificate loaded 2008.07.18 21:41:47 LOG7[13476:13096]: Key file: connector.pem 2008.07.18 21:41:47 LOG7[13476:13096]: Private key loaded 2008.07.18 21:41:47 LOG7[13476:13096]: SSL context initialized for service server2connector 2008.07.18 21:41:47 LOG7[13476:13096]: Certificate: connector.pem 2008.07.18 21:41:47 LOG7[13476:13096]: Certificate loaded 2008.07.18 21:41:47 LOG7[13476:13096]: Key file: connector.pem 2008.07.18 21:41:47 LOG7[13476:13096]: Private key loaded 2008.07.18 21:41:47 LOG7[13476:13096]: SSL context initialized for service test 2008.07.18 21:41:47 LOG5[13476:13096]: stunnel 4.25 on x86-pc-mingw32-gnu with OpenSSL 0.9.8h 28 May 2008 2008.07.18 21:41:47 LOG5[13476:13096]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 Please consider the environment before printing this email. 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Difference between verify level 2 and 3
by Sandeep Kumar 16 Jul '08

16 Jul '08

Hi, I searched a lot on google, in the archives, and in the FAQ page, but could not find the differences between verify levels 2 and 3, other than the one line explanation given on the FAQ/man page. Specifically, I want to ask: 1. Is verify level 3 same as 2, but asks for client certificates as well? (Seems unlikely but still..) 2. Since verify level 2 also demands CApath/CAfile to be present, then it also is ultimately verifying against locally installed certs, which is supposed to be level 3's behaviour? Thanks & regards, Sandeep Kumar http://web.iiit.ac.in/~sandeep_kr

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stunnel-portforwarding
by vinod bhasi 16 Jul '08

16 Jul '08

Hi All, I am a newbie as far as stunnel is concerned. I need help urgently on how to do port forwarding with Stunnel. Any help is appreciated. Thanks and Regards, Vinod Bhasi Save all your chat conversations. Find them online at http://in.messenger.yahoo.com/webmessengerpromo.php

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SSL with SMTP problem - sTunnel 4.25 Windows
by dscycler 14 Jul '08

14 Jul '08

I am using sTunnel 4.25 for Windows to send and receive e-mail from a GoldMine client. sTunnel has worked well over the years but am having an issue with a particular mail host, Live Office. They have implemented SMTP SSL on port 25. The debug log is as follows: 2008.07.14 13:45:11 LOG7[2136:5356]: smtp accepted FD=224 from 127.0.0.1:1907 2008.07.14 13:45:11 LOG7[2136:5356]: Creating a new thread 2008.07.14 13:45:11 LOG7[2136:5356]: New thread created 2008.07.14 13:45:11 LOG7[2136:4944]: smtp started 2008.07.14 13:45:11 LOG7[2136:4944]: FD 224 in non-blocking mode 2008.07.14 13:45:11 LOG5[2136:4944]: smtp accepted connection from 127.0.0.1:1907 2008.07.14 13:45:11 LOG7[2136:4944]: FD 232 in non-blocking mode 2008.07.14 13:45:11 LOG7[2136:4944]: smtp connecting 64.70.94.196:25 2008.07.14 13:45:11 LOG7[2136:4944]: connect_wait: waiting 10 seconds 2008.07.14 13:45:11 LOG7[2136:4944]: connect_wait: connected 2008.07.14 13:45:11 LOG5[2136:4944]: smtp connected remote server from 127.0.0.1:1908 2008.07.14 13:45:11 LOG7[2136:4944]: Remote FD=232 initialized 2008.07.14 13:45:11 LOG7[2136:4944]: SSL state (connect): before/connect initialization 2008.07.14 13:45:11 LOG7[2136:4944]: SSL state (connect): SSLv3 write client hello A 2008.07.14 13:45:11 LOG7[2136:4944]: SSL alert (write): fatal: handshake failure 2008.07.14 13:45:11 LOG3[2136:4944]: SSL_connect: 1408F10B: error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number 2008.07.14 13:45:11 LOG5[2136:4944]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2008.07.14 13:45:11 LOG7[2136:4944]: smtp finished (0 left) I am looking for help to troubleshoot the connection problem. Is this an sTunnel issue or a mail server issue? Are there conf file settings to address the issue? Thanks, DavidS

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Re: [stunnel-users] stunnel-users Digest, Vol 48, Issue 8
by Pietro Di Primo 10 Jul '08

10 Jul '08

Thank you for reply. I tryied it but it doesn't work because my client run some separated subprocesses and are them that contact the server so, if an extern process try to connect to 127.0.0.1:<the_found_port> while one of that subprocess has finished and the next is not yet started, it will be able to do it and also my subprocess will be pending (i tryed it). Hope i was able to explain the situation. Any suggestion? Thanks in advace > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 9 Jul 2008 13:26:03 +0200 (CEST) > From: "Pietro Di Primo" <pietro.diprimo(a)ct.infn.it> > Subject: [stunnel-users] client-server tunnelling > To: stunnel-users(a)mirt.net > Message-ID: > <2553.193.206.208.201.1215602763.squirrel(a)imapfis.ct.infn.it> > Content-Type: text/plain;charset=utf-8 > > Hi, I have a client server application, and want to tunnel it in this way: > a script select a free port in a random way, write the stunnel.conf file. > with "accept=<the_found_port>" and "connect=<my_server>" and run my client > application passing to 127.0.0.1:<the_found_port> as server address. > The problem is that i need to be sure that no other client or user can > access <the_found_port> while the application is running. > I guess that it should be possible to do it, but i wasn't able to. > > Can anybody help me? > > Thanks > > > -- > --- > > Ing. Pietro Di Primo > INFN - Istituto Nazionale di Fisica Nucleare > Grid Computing Research Area > Via S. Sofia 78 95123 CATANIA (Italy) > Voice : +39 095 378-5446/5517 > Fax. : +39 095 378 5518 > Mobile : +39 320 8591527 > E-mail : pietro.diprimo(a)ct.infn.it > Skype : pietrodiprimo > > > > ------------------------------ > > Message: 2 > Date: Wed, 9 Jul 2008 14:08:23 +0200 > From: Micha? Trojnara <Michal.Trojnara(a)mobi-com.net> > Subject: Re: [stunnel-users] client-server tunnelling > To: stunnel-users(a)mirt.net > Message-ID: <6ba9f1b703149916bb1a61fb68a1e377(a)mirt.net> > Content-Type: text/plain; charset="UTF-8" > > > Pietro Di Primo wrote: >> Hi, I have a client server application, and want to tunnel it in this > way: >> a script select a free port in a random way, write the stunnel.conf >> file. >> with "accept=<the_found_port>" and "connect=<my_server>" and run my > client >> application passing to 127.0.0.1:<the_found_port> as server address. >> The problem is that i need to be sure that no other client or user can >> access <the_found_port> while the application is running. >> I guess that it should be possible to do it, but i wasn't able to. > > Simply bind the specific network interface with: > accept=127.0.0.1:<the_found_port> > > Best regards, > Mike > > > > ------------------------------ > > _______________________________________________ > stunnel-users mailing list > stunnel-users(a)mirt.net > http://stunnel.mirt.net/mailman/listinfo/stunnel-users > > > End of stunnel-users Digest, Vol 48, Issue 8 > ******************************************** > -- --- Ing. Pietro Di Primo INFN - Istituto Nazionale di Fisica Nucleare Grid Computing Research Area Via S. Sofia 78 95123 CATANIA (Italy) Voice : +39 095 378-5446/5517 Fax. : +39 095 378 5518 Mobile : +39 320 8591527 E-mail : pietro.diprimo(a)ct.infn.it Skype : pietrodiprimo

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client-server tunnelling
by Pietro Di Primo 09 Jul '08

09 Jul '08

Hi, I have a client server application, and want to tunnel it in this way: a script select a free port in a random way, write the stunnel.conf file. with "accept=<the_found_port>" and "connect=<my_server>" and run my client application passing to 127.0.0.1:<the_found_port> as server address. The problem is that i need to be sure that no other client or user can access <the_found_port> while the application is running. I guess that it should be possible to do it, but i wasn't able to. Can anybody help me? Thanks -- --- Ing. Pietro Di Primo INFN - Istituto Nazionale di Fisica Nucleare Grid Computing Research Area Via S. Sofia 78 95123 CATANIA (Italy) Voice : +39 095 378-5446/5517 Fax. : +39 095 378 5518 Mobile : +39 320 8591527 E-mail : pietro.diprimo(a)ct.infn.it Skype : pietrodiprimo

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FW: how to start ??
by dominique 07 Jul '08

07 Jul '08

Hello, First time I am using stunnel. 1. The issue I had is with Altiris and Exchange. All our Exchange Servers are SSL now and Altiris is not-SSL. Altiris is reading an exchange mailbox and gives back an error : "Error receiving data from socket". So the infrastructure is composed of two servers one Altiris Server not-SSL which is attempting to communicate to an Exchange Server with SSL. The Altiris Server is trying to read the email in one mailbox hosted by an Exchange SSL Server 2. Stunnel 4.25 x86-pc-mingw32-gnu with openssl 0.9.8h 28 May 2008 3. Windows 2003 Server environment 4. stunnel -d -r 5. 2008.07.07 13:34:41 LOG7[4748:1676]: RAND_status claims sufficient entropy for the PRNG 2008.07.07 13:34:41 LOG7[4748:1676]: PRNG seeded successfully 2008.07.07 13:34:41 LOG7[4748:1676]: Certificate: stunnel.pem 2008.07.07 13:34:41 LOG7[4748:1676]: Certificate loaded 2008.07.07 13:34:41 LOG7[4748:1676]: Key file: stunnel.pem 2008.07.07 13:34:41 LOG7[4748:1676]: Private key loaded 2008.07.07 13:34:41 LOG7[4748:1676]: SSL context initialized for service pop3 2008.07.07 13:34:41 LOG5[4748:1676]: stunnel 4.25 on x86-pc-mingw32-gnu with OpenSSL 0.9.8h 28 May 2008 2008.07.07 13:34:41 LOG5[4748:1676]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2008.07.07 13:34:41 LOG5[4748:3596]: No limit detected for the number of clients 2008.07.07 13:34:41 LOG7[4748:3596]: FD 284 in non-blocking mode 2008.07.07 13:34:41 LOG7[4748:3596]: SO_REUSEADDR option set on accept socket 2008.07.07 13:34:41 LOG3[4748:3596]: Error binding pop3 to 149.142.194.230:995 2008.07.07 13:34:41 LOG3[4748:3596]: bind: Can't assign requested address (WSAEADDRNOTAVAIL) (10049) 2008.07.07 13:34:41 LOG3[4748:3596]: Server is down 6. no file gcc. Thanks, Dominique Dominique_duchemin(a)hotmail.com

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Using externally signed certificate with stunnel 4
by Tim Skirvin 07 Jul '08

07 Jul '08

I've got a comodo signed SSL certificate that I'm trying to use with stunnel4 to allow secure NNTP connections from a wide variety of clients. The certificate at least partially works; if I leave 'verify' off in the stunnel.conf file, then the service runs and users can connect, albeit while still having to verify the cert. But if I turn 'verify' on, then it doesn't work on *either* side. I've tried playing with CAfile and CApath without much luck. I'll attach my configuration files, the relevant pems, and some debugging information; is there something else I'm missing? I've already contacted comodo, and after several rounds of conversation they suggest I contact the list. Errors from the client side (note that I'm using a debug port here): + openssl s_client -connect news:565 -verify -debug verify depth is 0 CONNECTED(00000003) depth=2 /C=US/O=Entrust.net/OU=www.entrust.net/CPS incorp. by ref. (limits liab.)/OU=(c) 1999 Entrust.net Limited/CN=Entrust.net Secure Server Certification Authority verify error:num=19:self signed certificate in certificate chain verify return:0 6976:error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed:s3_clnt.c:951: ...and on the server, I get this: 2008.06.30 14:08:38 LOG7[10039:47679267941088]: nntps accepted FD=7 from 171.64.19.111:56122 2008.06.30 14:08:38 LOG7[10039:1073809760]: nntps started 2008.06.30 14:08:38 LOG7[10039:1073809760]: FD 7 in non-blocking mode 2008.06.30 14:08:38 LOG7[10039:1073809760]: FD 8 in non-blocking mode 2008.06.30 14:08:38 LOG7[10039:1073809760]: FD 9 in non-blocking mode 2008.06.30 14:08:38 LOG7[10039:47679267941088]: Cleaning up the signal pipe 2008.06.30 14:08:38 LOG6[10039:47679267941088]: Child process 10247 finished with code 0 2008.06.30 14:08:38 LOG7[10039:1073809760]: Connection from 171.64.19.111:56122 permitted by libwrap 2008.06.30 14:08:38 LOG5[10039:1073809760]: nntps connected from 171.64.19.111:56122 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): before/accept initialization 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 read client hello A 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 write server hello A 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 write certificate A 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 write certificate request A 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL state (accept): SSLv3 flush data 2008.06.30 14:08:38 LOG7[10039:1073809760]: SSL alert (read): fatal: unknown CA 2008.06.30 14:08:38 LOG3[10039:1073809760]: SSL_accept: 14094418: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca 2008.06.30 14:08:38 LOG5[10039:1073809760]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket 2008.06.30 14:08:38 LOG7[10039:1073809760]: nntps finished (0 left) Basic Requested Information that wasn't supplied above: * stunnel 4.18-2 on Debian etch (2.6.18-6-686 #1 SMP) * Running standalone with '/usr/bin/stunnel4 /etc/news/stunnel.conf' * libc6, no gcc, OpenSSL 0.9.8c-4etch3 * The log on startup: 2008.06.30 14:00:15 LOG7[26276:3083523776]: Snagged 64 random bytes from /root/.rnd 2008.06.30 14:00:15 LOG7[26276:3083523776]: Wrote 1024 new random bytes to /root/.rnd 2008.06.30 14:00:15 LOG7[26276:3083523776]: RAND_status claims sufficient entropy for the PRNG 2008.06.30 14:00:15 LOG7[26276:3083523776]: PRNG seeded successfully 2008.06.30 14:00:15 LOG7[26276:3083523776]: Configuration SSL options: 0x01000000 2008.06.30 14:00:15 LOG7[26276:3083523776]: SSL options set: 0x01000000 2008.06.30 14:00:15 LOG7[26276:3083523776]: Certificate: /etc/ssl/certs/news-stunnel.pem 2008.06.30 14:00:15 LOG7[26276:3083523776]: Certificate loaded 2008.06.30 14:00:15 LOG7[26276:3083523776]: Key file: /etc/ssl/private/news-stunnel.key 2008.06.30 14:00:15 LOG7[26276:3083523776]: Private key loaded 2008.06.30 14:00:15 LOG7[26276:3083523776]: Loaded verify certificates from /etc/ssl/certs/comodo.cert 2008.06.30 14:00:15 LOG7[26276:3083523776]: SSL context initialized for service nntps - Tim Skirvin (tskirvin(a)stanford.edu) -- Information Technology Services http://www.stanford.edu/~tskirvin/ System Software Developer, Unix Team Stanford University

1 1

Windows setup
by Koenraad Lelong 04 Jul '08

04 Jul '08

Hello, I would like to know if it is possible to run a silent setup of the Windows-setup of stunnel. I'm including it in my own setup of my own application so I would like to avoid the interaction of the stunnel-setup. Second question is if it is bad to "install" stunnel more than once on a computer. Until now I had a setup for new installations and an update for updates of my application. This seems not to work because some users use the setup to update an existing installation and with this they run the install of stunnel for the second time. If it is bad, how do I detect the existance of stunnel, and what version it is, so I could update stunnel if it's outdated. Regards, Koenraad Lelong. P.S. If this is the wrong list for such questions I apologize. I would like to know the right list.

1 0

Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization
by Fat Wallet 03 Jul '08

03 Jul '08

Hi, If anyone have a clue on what I should do to fix this issue, I would really appreciated: One of the stunnel process is running at 99% and in R state and the time just keep incrementing. [root@root]# ps auxw|grep stunnel root 781 0.0 0.0 6520 2684 ? T 11:01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 2853 0.0 0.0 3940 604 ttyp2 S+ 11:37 0:00 grep stunnel root 16554 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16555 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16556 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16557 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16558 0.0 0.0 3992 788 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16561 0.0 0.0 6520 2684 ? Ts Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 16656 0.0 0.0 6520 2684 ? S Jul01 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 23954 0.0 0.0 6520 2684 ? S 08:00 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 23955 99.0 0.0 6520 2684 ? R 08:00 189:52 /usr/sbin/stunnel /etc/stunnel/stunnel.conf root 31521 0.0 0.0 6520 2684 ? S 10:30 0:00 /usr/sbin/stunnel /etc/stunnel/stunnel.conf 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?

2 1

protect the private key, while running stunnel in server mode as a windows service
by sandeep siroya 03 Jul '08

03 Jul '08

Hi, I have stunnel in server mode running as a windows service on a Win2003 Server system. I need to give this system to a different company for testing their client against our server. How do I protect my private key on stunnel, while letting the 3rd company being able to login as administrator on stunnel's win2003 system and start/stop stunnel service? I know one can protect the private key with a passphrase in stunnel, but that does not serve my purpose as stunnel in this case should be able to start/stop without any user-intervention and I cannot store the passphrase in cleartext. thanks , ss

1 0

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.

1 0

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.

1 0

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?

1 0

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-----

1 1

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

2 1

UPNP & Nat-PMP with Stunnel
by Dean Shavit 26 Jun '08

26 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?

1 0

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 ...

2 4

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

1 0

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.

1 0

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

1 0

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

2 1

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

2 1

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

17 Jun '08

1 0

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

1 0

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

2 1

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

06 Jun '08

1 0

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

1 0

stunnel compatibility question
by Jeffrey Buck 04 Jun '08

04 Jun '08

2 4

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

1 0

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

3 9

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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Need class name for stunnel
by Bill Murphy 28 May '08

28 May '08

I'm using stunnel to send and receive emails in a Microsoft Access 2007 application. I would like to be able to programmatically close stunnel when the user exits a form in the application which is used for sending and receiving emails. I can close other programs running in Windows with the code in this api: http://www.mvps.org/access/api/api0025.htm This code requires the "class name" of the application while it is running in Windows in order to close it. Stunnel.exe does not appear to have a class name. I've used the following additional api to display the class names of all currently running apps: http://www.mvps.org/access/api/api0013.htm Stunnel.exe does not show up in the list of running apps produced by this code. Is there another way to determine the stunnel class name? Bill

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Re: [stunnel-users] Problem with Stunnel and OpenBSD
by Juan J. Martínez 23 May '08

23 May '08

Hello, I'm debugging with openssl s_client... >From inside the box: $ openssl s_client -connect blackshell.usebox.net:995 CONNECTED(00000004) depth=0 /C=ES/ST=Valencia/L=Valencia/O=usebox.net/OU=blackshell/CN=blackshell.usebox.net verify error:num=18:self signed certificate verify return:1 depth=0 /C=ES/ST=Valencia/L=Valencia/O=usebox.net/OU=blackshell/CN=blackshell.usebox.net verify return:1 ... And works fine. >From outside: $ openssl s_client -connect blackshell.usebox.net:995 CONNECTED(00000003) (and halts for n minutes) I hope this helps, even I don't know the difference between "CONNECTED(00...4)" and "CONNECTED(00...3)". Regards, Juanjo -- desarrollo y sistemas: http://www.usebox.net/ página personal: http://www.usebox.net/jjm/

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STUNNEL: Thunderbird with Exchange and only inbound port 443
by Fatma 23 May '08

23 May '08

Hello All, A quick question regarding the stunnel ability to work with the following scenario. Scenario is: I have an Exchange Server sitting on the external perimeter with Outlook Web Access (OWA) enabled and it is the frontend and backend mail server as well. And I have a remote client which has a Thunderbird Client (for example) that I need it to connect to the Exchange Server to retrieve emails. The only inbound port to the Exchange Server from a network perspective is HTTPS-443 and no other ports are open on the firewall. Now the question is how can a client thunderbird connect to the Exchange Server/OWA with only 443 port open. So what i was thinking is and tell me if this works? If i install two instances of STUNNEL one on the remote client and one on the exchange server and the following happens. on the client the stunnel listens on port 25 SMTP and encrypts and forwards to port 443 then the server recieves and listens on port 443 and decrypts and forwards to port 110 POP3 will that work actually? hmmm i wish i explained that pretty well. if not then how can it work with the given scenario. cheerz.

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Re: [stunnel-users] Wrapping a mail client - multiple servers
by Ludolf Holzheid 21 May '08

21 May '08

On Wed, 2008-05-21 14:39:42 +0100, Daniel James wrote: > [..] > > Can I, for example, put multiple [SSMTP] sections and multiple [POP3S] > sections in one stunnel.conf? I don't know. But if you can, you don't want to. The section headers don't specify a protocol. They simply give the section a name (for log output, e.g.). There is no problem in naming sections [first-POP3S] and [second-POP3S]. HTH, Ludolf -- --------------------------------------------------------------- Ludolf Holzheid Tel: +49 621 339960 Bihl+Wiedemann GmbH Fax: +49 621 3392239 Floßwörthstraße 41 e-mail: lholzheid(a)bihl-wiedemann.de D-68199 Mannheim, Germany ---------------------------------------------------------------

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Wrapping a mail client - multiple servers
by Daniel James 21 May '08

21 May '08

I use a mail client that does not directly support SSL. I can use stunnel to provide the security layer when I connect to a SSMTP and/or POP3S server (under windows). This works fine, whether I run stunnel as a background application or as a Windows service. I'd like, however, to be able to connect to multiple mail servers over SSL. I'm not sure how I might achieve this? What would be nice would be get stunnel to forward POP3/SMTP communication on different local ports to POP3S/SSMTP on different remote servers. Can I do this? It appears to be possible to run multiple copies of stunnel as applications, and to get each copy to take its configuration from a different stunnel.conf file, so that different copies of stunnel could listen on different local ports and each could proxy the traffic it receives to a different remote server (I haven't tried this -- and it's not an ideal solution -- but it looks as though it should work). It does not appear to be possible, however, to create two instances of the stunnel service running with different configuration files. Is it possible to set up multiple listening ports proxying to different remote servers in a single configuration file? If so, what's the syntax for that? Cheers, Daniel.

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