- stunnel-users - stunnel.org

Intermittent error in 042_inetd
by Ian Bamforth 04 Jul '18

04 Jul '18

Afternoon, Until recently we'd disabled `make test` because of certificate problems - we've re-enabled it (using `make check`) but are getting intermittent failures (around 50% of CI runs). Below is the output from the logs - I can't see what's gone wrong, can anyone shed any light? 2018.07.04 09:59:36 LOG7[ui]: Clients allowed=14648 2018.07.04 09:59:36 LOG7[ui]: errno: (*__errno_location ()) 2018.07.04 09:59:36 LOG7[ui]: Compression disabled 2018.07.04 09:59:36 LOG7[ui]: No PRNG seeding was required 2018.07.04 09:59:36 LOG7[ui]: Ciphers: HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK 2018.07.04 09:59:36 LOG7[ui]: TLS options: 0x02004004 (+0x00004000, -0x00000000) 2018.07.04 09:59:36 LOG7[ui]: Private key check succeeded 2018.07.04 09:59:36 LOG7[ui]: ECDH initialization 2018.07.04 09:59:36 LOG7[ui]: ECDH initialized with curve prime256v1 2018.07.04 09:59:36 LOG7[ui]: Binding service [server] 2018.07.04 09:59:36 LOG7[ui]: Listening file descriptor created (FD=6) 2018.07.04 09:59:36 LOG7[ui]: Setting accept socket options (FD=6) 2018.07.04 09:59:36 LOG7[ui]: Option SO_REUSEADDR set on accept socket 2018.07.04 09:59:36 LOG7[main]: Created pid file /opt/stunnel/stunnel-5.48/tests/logs/stunnel.pid 2018.07.04 09:59:36 LOG7[cron]: Cron thread initialized 2018.07.04 09:59:36 LOG7[main]: Found 1 ready file descriptor(s) 2018.07.04 09:59:36 LOG7[main]: FD=4 events=0x2001 revents=0x0 2018.07.04 09:59:36 LOG7[main]: FD=6 events=0x2001 revents=0x1 2018.07.04 09:59:36 LOG7[main]: Service [server] accepted (FD=3) from 127.0.0.1:58890 2018.07.04 09:59:36 LOG7[0]: Service [server] started 2018.07.04 09:59:36 LOG7[0]: Setting local socket options (FD=3) 2018.07.04 09:59:36 LOG7[0]: Option TCP_NODELAY set on local socket 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): before SSL initialization 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): before SSL initialization 2018.07.04 09:59:36 LOG7[0]: SNI: no virtual services defined 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS read client hello 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS write server hello 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS write certificate 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS write key exchange 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS write server done 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS write server done 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS read client key exchange 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS read change cipher spec 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS read finished 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS write change cipher spec 2018.07.04 09:59:36 LOG7[0]: TLS state (accept): SSLv3/TLS write finished 2018.07.04 09:59:36 LOG7[0]: New session callback 2018.07.04 09:59:36 LOG7[0]: 1 server accept(s) requested 2018.07.04 09:59:36 LOG7[0]: 1 server accept(s) succeeded 2018.07.04 09:59:36 LOG7[0]: 0 server renegotiation(s) requested 2018.07.04 09:59:36 LOG7[0]: 0 session reuse(s) 2018.07.04 09:59:36 LOG7[0]: 1 internal session cache item(s) 2018.07.04 09:59:36 LOG7[0]: 0 internal session cache fill-up(s) 2018.07.04 09:59:36 LOG7[0]: 0 internal session cache miss(es) 2018.07.04 09:59:36 LOG7[0]: 0 external session cache hit(s) 2018.07.04 09:59:36 LOG7[0]: 0 expired session(s) retrieved 2018.07.04 09:59:36 LOG7[0]: Compression: null, expansion: null 2018.07.04 09:59:36 LOG7[0]: Setting remote socket options (FD=10) 2018.07.04 09:59:36 LOG7[0]: Option TCP_NODELAY set on remote socket 2018.07.04 09:59:36 LOG7[0]: Remote descriptor (FD=10) initialized 2018.07.04 09:59:36 LOG7[0]: TLS alert (read): warning: close notify 2018.07.04 09:59:36 LOG7[0]: Sent socket write shutdown 2018.07.04 09:59:36 LOG7[0]: Remote descriptor (FD=10) closed 2018.07.04 09:59:36 LOG7[0]: Local descriptor (FD=3) closed 2018.07.04 09:59:36 LOG7[0]: Service [server] finished (0 left) 2018.07.04 09:59:36 LOG7[main]: Found 1 ready file descriptor(s) 2018.07.04 09:59:36 LOG7[main]: FD=4 events=0x2001 revents=0x1 2018.07.04 09:59:36 LOG7[main]: FD=6 events=0x2001 revents=0x0 2018.07.04 09:59:36 LOG7[main]: Dispatching a signal from the signal pipe 2018.07.04 09:59:36 LOG7[main]: Processing SIGCHLD 2018.07.04 09:59:36 LOG7[main]: Retrieving pid statuses with waitpid() 2018.07.04 09:59:36 LOG7[ui]: Clients allowed=14648 2018.07.04 09:59:36 LOG7[ui]: errno: (*__errno_location ()) 2018.07.04 09:59:36 LOG7[ui]: Compression disabled 2018.07.04 09:59:36 LOG7[ui]: No PRNG seeding was required 2018.07.04 09:59:36 LOG7[ui]: Ciphers: HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK 2018.07.04 09:59:36 LOG7[ui]: TLS options: 0x02000004 (+0x00000000, -0x00000000) 2018.07.04 09:59:36 LOG7[ui]: No certificate or private key specified 2018.07.04 09:59:36 LOG7[0]: Service [inetd client] started 2018.07.04 09:59:36 LOG7[0]: s_connect: s_poll_wait 127.0.0.1:4433: waiting 10 seconds 2018.07.04 09:59:36 LOG7[0]: Setting remote socket options (FD=3) 2018.07.04 09:59:36 LOG7[0]: Option TCP_NODELAY set on remote socket 2018.07.04 09:59:36 LOG7[0]: Remote descriptor (FD=3) initialized 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): before SSL initialization 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS write client hello 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS write client hello 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS read server hello 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS read server certificate 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS read server key exchange 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS read server done 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS write client key exchange 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS write change cipher spec 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS write finished 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS write finished 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS read change cipher spec 2018.07.04 09:59:36 LOG7[0]: TLS state (connect): SSLv3/TLS read finished 2018.07.04 09:59:36 LOG7[0]: New session callback 2018.07.04 09:59:36 LOG7[0]: Peer certificate was cached (1241 bytes) 2018.07.04 09:59:36 LOG7[0]: 1 client connect(s) requested 2018.07.04 09:59:36 LOG7[0]: 1 client connect(s) succeeded 2018.07.04 09:59:36 LOG7[0]: 0 client renegotiation(s) requested 2018.07.04 09:59:36 LOG7[0]: 0 session reuse(s) 2018.07.04 09:59:36 LOG7[0]: Compression: null, expansion: null 2018.07.04 09:59:36 LOG7[0]: Sending close_notify alert 2018.07.04 09:59:36 LOG7[0]: TLS alert (write): warning: close notify 2018.07.04 09:59:36 LOG7[0]: Remote descriptor (FD=3) closed 2018.07.04 09:59:36 LOG7[0]: Service [inetd client] finished (0 left) 2018.07.04 09:59:36 LOG7[0]: Deallocating section defaults 2018.07.04 09:59:36 LOG7[main]: Found 1 ready file descriptor(s) 2018.07.04 09:59:36 LOG7[main]: FD=4 events=0x2001 revents=0x1 2018.07.04 09:59:36 LOG7[main]: FD=6 events=0x2001 revents=0x0 2018.07.04 09:59:36 LOG7[main]: Dispatching a signal from the signal pipe 2018.07.04 09:59:36 LOG7[main]: Processing SIGNAL_TERMINATE 2018.07.04 09:59:36 LOG7[main]: Leak detection table utilization: 86/997, 8.63% 2018.07.04 09:59:36 LOG7[main]: Removed pid file /opt/stunnel/stunnel-5.48/tests/logs/stunnel.pid 2018.07.04 09:59:36 LOG7[main]: Deallocating section defaults Regards, Ian Bamforth Senior Software Engineer Operations & Planning Systems Division T: +44 (0)113 344 3970<tel:00441133443970> M: +44 (0)7852 404240<tel:00447852404240> E: Ian.Bamforth(a)tracsis.com<mailto:Ian.Bamforth@tracsis.com> W: www.tracsis.com<https://www.tracsis.com> www.tracsisops.com<http://www.tracsisops.com> Follow Us [https://static.tracsis.com/email/lin2.png]<https://www.linkedin.com/company/972873?trk=tyah&trkInfo=idx:1-1-1,tarId:14…> [https://static.tracsis.com/email/twi2.png] <https://www.twitter.com/tracsis> Tracsis plc Leeds Innovation Centre 103 Clarendon Road Leeds LS2 9DF [https://static.tracsis.com/email/award4.png] Tracsis 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stunnel on Windows - using CAPI - tls v1.2?==?utf-8?q? ?
by Brian Ipsen 04 Jul '18

04 Jul '18

Hi Does anyone know whether there is a fix pending for being able to use the Windows built-in certificate store (by CAPI) for client authentication - and using TLS v1.2 ? Currently I need to force the stunnel client to use TLS v1.1, as there seem to be a limitation somewhere if using TLS v1.2... Regards Brian

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tls linger
by Daniel Trickett 03 Jul '18

03 Jul '18

Hi, We are using stunnel to allow us to punchout to suppliers using TLS 1.2 protocol. We are seeing the following with this particular supplier. 2018.07.02 08:49:05 LOG6[4]: TLS connected: previous session reused 2018.07.02 08:49:05 LOG6[4]: TLSv1.2 ciphersuite: ECDHE-RSA-AES256-SHA384 (256-bit encryption) 2018.07.02 08:49:05 LOG7[4]: Compression: null, expansion: null 2018.07.02 08:49:15 LOG3[4]: SSL_read: Connection reset by peer (131) 2018.07.02 08:49:15 LOG5[4]: Connection reset: 1720 byte(s) sent to TLS, 0 byte(s) sent to socket 2018.07.02 08:49:15 LOG7[4]: linger (remote): Invalid argument (22) 2018.07.02 08:49:15 LOG7[4]: Remote descriptor (FD=13) closed 2018.07.02 08:49:15 LOG7[4]: Local descriptor (FD=3) closed 2018.07.02 08:49:15 LOG7[4]: Service [dell-https] finished (0 left) We have set socket = l:SO_LINGER=1:60, but still occasionally have an issue. Is there anything else that we may need to set? Since the below is default, would not expect to set it.. socket = a:SO_REUSEADDR=no disable address reuse (enabled by default) Best regards, Dan This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. If you are not the intended recipient, you must not copy this message or attachment or disclose the contents to any other person. If you have received this transmission in error, please notify the sender immediately and delete the message and any attachment from your system. Merck KGaA, Darmstadt, Germany and any of its subsidiaries do not accept liability for any omissions or errors in this message which may arise as a result of E-Mail-transmission or for damages resulting from any unauthorized changes of the content of this message and any attachment thereto. Merck KGaA, Darmstadt, Germany and any of its subsidiaries do not guarantee that this message is free of viruses and does not accept liability for any damages caused by any virus transmitted therewith. Click http://www.emdgroup.com/emd/imprint/mail_disclaimer.html to access the German, French, Spanish and Portuguese versions of this disclaimer.

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Re: [stunnel-users] stunnel-users Digest, Vol 168, Issue 2
by Avinash Kumar 03 Jul '18

03 Jul '18

Hi, As requested, Posting my configuration. [https-App-setup] client = yes accept = 9898 connect = <<source-ipaddress>>:9898 cert = <<stunnel-installationdirectory>>\config\App\morpheus.pem key = <<stunnel-installationdirectory>>\config\App\morpheus.key CAfile = <<stunnel-installationdirectory>>\config\App\root-ca.pem sslVersion = TLSv1 options = NO_SSLv3 Regards, Avinash Kumar On Tue, Jul 3, 2018 at 3:30 PM, <stunnel-users-request(a)stunnel.org> wrote: > Send stunnel-users mailing list submissions to > stunnel-users(a)stunnel.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users > or, via email, send a message with subject or body 'help' to > stunnel-users-request(a)stunnel.org > > You can reach the person managing the list at > stunnel-users-owner(a)stunnel.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of stunnel-users digest..." > > > Today's Topics: > > 1. Re: Stunnel Issue (Flo Rance) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 3 Jul 2018 11:18:03 +0200 > From: Flo Rance <trourance(a)gmail.com> > To: Avinash Kumar <avinash14331(a)gmail.com> > Cc: stunnel-users(a)stunnel.org > Subject: Re: [stunnel-users] Stunnel Issue > Message-ID: > <CAHogYcUn6BzfBr75X-DuteetppESv2KOjGJmGO7mc=SuHVaE > Xw(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Please post your configuration. Without that, it's not obvious. > > Regards, > Flo > > On Tue, Jul 3, 2018 at 10:42 AM, Avinash Kumar <avinash14331(a)gmail.com> > wrote: > > > Attaching the screenshot > > > > Regards, > > Avinash Kumar > > > > On Tue, Jul 3, 2018 at 2:11 PM, Avinash Kumar <avinash14331(a)gmail.com> > > wrote: > > > >> Hi, > >> > >> I am getting below error while connecting through stunnel: > >> > >> > >> > >> Regards, > >> Avinash Kumar > >> > > > > > > _______________________________________________ > > stunnel-users mailing list > > stunnel-users(a)stunnel.org > > https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users > > > > >

2 1

Stunnel Issue
by Avinash Kumar 03 Jul '18

03 Jul '18

Hi, I am getting below error while connecting through stunnel: Regards, Avinash Kumar

2 2

stunnel 5.48 released
by Michal Trojnara 02 Jul '18

02 Jul '18

Dear Users, I have released version 5.48 of stunnel. Version 5.48, 2018.07.02, urgency: HIGH * Security bugfixes - Fixed requesting client certificate when specified as a global option. * New features - Certificate subject checks modified to accept certificates if at least one of the specified checks matches. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 1011d5a302ce6a227882d094282993a3187250f42f8a801dcc1620da63b2b8df stunnel-5.48.tar.gz eb160fdf28061eb509e09824ab9cd26f4f0ca9be3b90008bba32274d5136c7eb stunnel-5.48-win32-installer.exe 667ee8c8d5440117285eb5a5ddf0d305a6dd1dbb93dcf5b7bac62f84ddba7466 stunnel-5.48-android.zip Best regards, Mike

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tls question
by Daniel Trickett 02 Jul '18

02 Jul '18

Hi, If I use stunnel 5.44, how do I know that the protocol being used is TLS1.2? Is it the default? Working with supplier sites which still accept 1.0/1.1, but want to make sure that I am using 1.2, as they will be disabling the older protocols. Thanks and Best regards, Dan This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. If you are not the intended recipient, you must not copy this message or attachment or disclose the contents to any other person. If you have received this transmission in error, please notify the sender immediately and delete the message and any attachment from your system. Merck KGaA, Darmstadt, Germany and any of its subsidiaries do not accept liability for any omissions or errors in this message which may arise as a result of E-Mail-transmission or for damages resulting from any unauthorized changes of the content of this message and any attachment thereto. Merck KGaA, Darmstadt, Germany and any of its subsidiaries do not guarantee that this message is free of viruses and does not accept liability for any damages caused by any virus transmitted therewith. Click http://www.emdgroup.com/emd/imprint/mail_disclaimer.html to access the German, French, Spanish and Portuguese versions of this disclaimer.

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Potentially dangerous change of behavior in handling "global option" in stunnel after version 5.45
by Tony Cheneau 29 Jun '18

29 Jun '18

Hello everyone, I was updating my version of stunnel and playing my regression suite and I was surprised to see some tests fail. We usually apply "verify = 2" as global option at the beginning of the configuration file on our stunnel "server" so as to enforce the client certificate verification. So I was a little bit surprise to see I could establish a TLS connection with my test server without providing a client certificate. The "verify = 2" as a "global option" is parsed at some point, because I can trigger an error message if I place a bogus value ("verify = 8"). Yet, it seems to be ignored when accepting connections. If I move the "verify = 2" from the "global option" to a service-level option for a specific service/tunnel, it works as expected (and documented): it rejects my certificate-less client. After a little bit of investigation, I was able to narrow down the change of behavior in version 5.45 (meaning that 5.44 still follow the old behavior). All the newer version follow this new behavior. I haven't seen any public CVS/SVN/git for stunnel, so I was not able to narrow it down further and I could not identify the exact change in the code that modified the behavior. While I understand that this option is documented in the manpage as a service-level option, in practice, "verify" could be used as a global option for years (my oldest documented usage at my company dates back from stunnel 4.54). (I know this option is going to be replaced by verifyChain/requireCert, the observed behavior reported in this email also applies on these options: they can't be applied program wide as a "global option") Am I missing something obvious here ? I haven't seen the change documented in the changelog, so it looks like a regression to me. Thank you in advance (and thank you for the great piece of software, obviously!). Regards, Tony Cheneau

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Re: [stunnel-users] stunnel 5.47 released
by Eric S Eberhard 28 Jun '18

28 Jun '18

Query -- how does this relate to TLSv1.3 and the alpha version (which is not going to work with the final version -- and does not exist I think) -- and what version of openssl do you recommend? Thanks, Eric Eric S Eberhard VICS (Vertical Integrated Computer Systems) Voice: 928 567 3529 Cell : 928 301 7537 (not reliable except for text or if not home) 2933 W Middle Verde Rd Camp Verde, AZ 86322 -----Original Message----- From: stunnel-users [mailto:stunnel-users-bounces@stunnel.org] On Behalf Of Michal Trojnara Sent: Friday, June 22, 2018 11:10 PM To: stunnel-users(a)stunnel.org; stunnel-announce(a)stunnel.org; openssl-users(a)openssl.org Subject: [stunnel-users] stunnel 5.47 released Dear Users, I have released version 5.47 of stunnel. Version 5.47, 2018.06.23, urgency: HIGH * New features - Fast add_lock_callback for OpenSSL < 1.1.0. This largely improves performance on heavy load. - Automatic detection of Homebrew OpenSSL. - Clarified port binding error logs. - Various "make test" improvements. * Bugfixes - Fixed a crash on switching to SNI slave sections. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: c4e675db996eb92beef885f72a3ed8af3c7603fea6b99d2873198dd6c0021d0b stunnel-5.47.tar.gz 985e1d65a3f4a7599cc78630960e1b2c97981f91ce6bc41f2eefcd371b4067a3 stunnel-5.47-win32-installer.exe 309cfb79329448f0c134aece0d10d0737e3728b25c288e9a76650837cd6f839c stunnel-5.47-android.zip Best regards, Mike

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question regarding TLS connection.
by Daniel Trickett 26 Jun '18

26 Jun '18

Hi We are using stunnel 5.44. We are having an issue connecting with a customer who is not supporting TLS 1.1, only 1.2 and 1.3. When I look in the log, I see the following. Why do I see the SSLv3 note in the line? The below leads me to believe that we connect to the customer, but they say that we are not. 2018.06.25 11:37:24 LOG7[7]: TLS state (connect): SSLv3 read server certificate A 2018.06.25 11:37:24 LOG6[7]: Client certificate not requested 2018.06.25 11:37:24 LOG7[7]: TLS state (connect): SSLv3 read server done A 2018.06.25 11:37:24 LOG7[7]: TLS state (connect): SSLv3 write client key exchange A 2018.06.25 11:37:24 LOG7[7]: TLS state (connect): SSLv3 write change cipher spec A 2018.06.25 11:37:24 LOG7[7]: TLS state (connect): SSLv3 write finished A 2018.06.25 11:37:24 LOG7[7]: TLS state (connect): SSLv3 flush data 2018.06.25 11:37:24 LOG7[7]: TLS state (connect): SSLv3 read finished A 2018.06.25 11:37:24 LOG7[7]: 1 client connect(s) requested 2018.06.25 11:37:24 LOG7[7]: 1 client connect(s) succeeded 2018.06.25 11:37:24 LOG7[7]: 0 client renegotiation(s) requested 2018.06.25 11:37:24 LOG7[7]: 0 session reuse(s) 2018.06.25 11:37:24 LOG6[7]: TLS connected: new session negotiated Best regards, Dan Daniel Trickett Head of Database Services | MBS Business Technology BX-TCS-O Oracle ERP Business Services of Merck KGaA, Darmstadt, Germany Planned Absence - 7/2/2018 - 7/6/2018 MilliporeSigma A business of Merck KGaA, Darmstadt, Germany EMD Millipore Corporation | 80 Ashby Road | Bedford, MA 01730 | USA office 781-533-3017 |cell 978-761-3506 |email daniel.trickett(a)emdmillipore.com<mailto:daniel.trickett@emdmillipore.com> This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. If you are not the intended recipient, you must not copy this message or attachment or disclose the contents to any other person. If you have received this transmission in error, please notify the sender immediately and delete the message and any attachment from your system. Merck KGaA, Darmstadt, Germany and any of its subsidiaries do not accept liability for any omissions or errors in this message which may arise as a result of E-Mail-transmission or for damages resulting from any unauthorized changes of the content of this message and any attachment thereto. Merck KGaA, Darmstadt, Germany and any of its subsidiaries do not guarantee that this message is free of viruses and does not accept liability for any damages caused by any virus transmitted therewith. Click http://www.emdgroup.com/emd/imprint/mail_disclaimer.html to access the German, French, Spanish and Portuguese versions of this disclaimer.

2 1

stunnel 5.47 released
by Michal Trojnara 23 Jun '18

23 Jun '18

Dear Users, I have released version 5.47 of stunnel. Version 5.47, 2018.06.23, urgency: HIGH * New features - Fast add_lock_callback for OpenSSL < 1.1.0. This largely improves performance on heavy load. - Automatic detection of Homebrew OpenSSL. - Clarified port binding error logs. - Various "make test" improvements. * Bugfixes - Fixed a crash on switching to SNI slave sections. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: c4e675db996eb92beef885f72a3ed8af3c7603fea6b99d2873198dd6c0021d0b stunnel-5.47.tar.gz 985e1d65a3f4a7599cc78630960e1b2c97981f91ce6bc41f2eefcd371b4067a3 stunnel-5.47-win32-installer.exe 309cfb79329448f0c134aece0d10d0737e3728b25c288e9a76650837cd6f839c stunnel-5.47-android.zip Best regards, Mike

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Stunnel 5.45 and 5.46 crashes upon reconnect HTTPS
by Javier 22 Jun '18

22 Jun '18

Hi, isn't annoying when you are using an old version, 5.44, and all goes fine, you notice you are outdated and then comes the problems after update? :-P The thing is that yesterday I needed the HTTPS server so I run Stunnel 5.44 for my non-SSL app and all was fine. I updated to 5.46 just because I forgot the last time and didn't even run again because I didn't need it. Today I used it and... I had a crash. I tested 5.45 to trace versions back, and it crashes as well. Back to 5.44 and no crash. The crash happens when there is a reload/reconnect/multiconnect (example, 2 connections html+images) by the browser when connects to an HTTPS server. It only happens when using a SNI service. I've been able to trace back the log on those versions and when fails in 5.45 and 5.46 is at the time when it needs to switch to the SNI service. (log from 5.44) SNI: requested servername: xxx SNI: matched pattern: xxx SNI: switched to service [xxx] <<<<----- BEFORE SWITCH, IT CRASHES on 5.45 and 5.46 Imagine you load https://xxx/. The first time is fine, the second, crashes stunnel. Not happening with 5.44. I haven't seen any change to SNI in manual so... :-? These are the configs for the used virtual servers. Nothing has been changed, anyway: [SSL] client = no accept = y.y.y.1:4747 connect = y.y.y.2:443 [SSL-xxx-SNI] client = no sni = SSL:xxx connect = y.y.y.2:443 cert = pem key = pem Don't mind the port numbers. They aren't in conflict. Running on Windows 2000. Regards.

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Reg : Stunnel + RSYNC Usage with TLSv1.2
by Sakthivel Ganesamoorthy 20 Jun '18

20 Jun '18

Hi, I have configured a server and client for Stunnel + Rsync usage over TLSv1.2. It is working fine, but I wanted to verify the "Cipher Key" exchange mechanism between "Server & Client" via "Wireshark". When I captured the logs via "Wireshark", it shows everything as TCP messages and I don't see any "Client Hello message (or) Cipher Key exchange message (or) any of the TLSv1.2" handshake messages. Please let me know whether I'm missing something here. Thanks, Sakthi

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stunnel used as jump host for SFTP
by Schultz, Cecilia 20 Jun '18

20 Jun '18

Hello, I am trying to test stunnel to see if it can provide the functionality we need. We are a Windows shop. What we need is for multiple client machines (I call these C1, C2, C3) to connect to our server (S). Server S will connect to a remote SFTP server (port 22). I call the remote SFTP server "R". C1, C2, C3 and S are all inside our firewall. Currently S can connect and send files to R using SFTP (port 22). The problem is that R does not accept a range of IP addresses, and has a limit on the number of IP addresses they can accept. So, what I need is for C1, C2, C3 to be able to connect to server R using S as a jump host. >From R's perspective, it should be like the connection is coming from S. Question 1: can stunnel be used to accomplish this? Question 2: I have installed stunnel in a test server ("stunnel -install" actually from the bin folder), and configured the conf like this: [sftp] accept=127.0.0.1:22 connect=some.remote.server.com:22 I tried to use Winscp SFTP client to test a connection, but it times out. I then checked S, and I don't see anything listening on port 22. I did "netstat -a" and I don't see anything listening on port 22. Was something wrong in the "stunnel -install" command? Shouldn't it be listening on port 22? Also, I uncommented the entry for log, but I don't see any log file in the stunnel folder/subfolders ; Debugging stuff (may be useful for troubleshooting) debug = info output = stunnel.log Thanks for your help, Cecilia

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Re: [stunnel-users] stunnel used as jump host for SFTP
by Schultz, Cecilia 20 Jun '18

20 Jun '18

Thank you so much for the info! I will try this out. From: stunnel-users <stunnel-users-bounces(a)stunnel.org> On Behalf Of Harris, Douglas (SSC/SPC) Sent: Wednesday, June 20, 2018 5:08 AM To: stunnel-users(a)stunnel.org Subject: Re: [stunnel-users] stunnel used as jump host for SFTP You can accomplish this in Windows. Just add a port forwarding rule to S: netsh interface portproxy add v4tov4 listenport=22 listenaddress=[IP of S] connectport=22 connectaddress=[IP of R] -Doug

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stunnel PSK support via custome openssl engine
by Tarakeshwar Rao 14 Jun '18

14 Jun '18

Dear Stunnel-users, >From Stunnel man pages, I could see that we could read PSK secret from plain text file with following option: PSKsecrets = psk.txt Could it possible to use custom openssl engine to read PSK file from HSM. I know that this works for reading TLS keys. I am not sure how I could do it for PSK. Thanks for your support, Regards, Tarak

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is it possible to make stunnel works for dbmail timsieved?
by cktmwe＠gmail.com 12 Jun '18

12 Jun '18

hello everyone, I'm currently try to stunnel sieve traffic to local dbmail timsieved, unfortunately I couldn't get it to work, my first question, does stunnel support sieve manage protocol? secondly if it does, how can I config the service? what I've done so far. timsieved started on 127.0.0.1:2000, connect and manage all works, I saw connection in dbmail log, then define sieve service block in stunnel.conf, restart stunnel, but if I connect our.public.ip:4190, timsieved becames no connection at all, dbmail log kept silent. traffic from port 4190 is already accepted in iptables. config that I used. > [sieve] > accept = our.public.ip:4190 > connect = 127.0.0.1:2000 > software version: stunnel-5.43 dbmail-3.2.3 Thanks.

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Slow DNS lookups when DNS does not respond
by Guillermo Rodriguez Garcia 08 Jun '18

08 Jun '18

Hi all, I have stunnel setup on a Linux box and I am experiencing very slow DNS lookup times when DNS does not respond. On this same system, anything that results in a DNS lookup (e.g. ping, ...) takes about 20 seconds before it times out and fails. However with stunnel (and a single service configured) the lookup takes more than 1 minute (approx 80 seconds). Is there any way to configure this? Thank you, Guillermo Rodriguez Garcia guille.rodriguez(a)gmail.com

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Windows 2016 Server: [!] bind: Address already in use (WSAEADDRINUSE) (10048)
by Martin Schweizer 06 Jun '18

06 Jun '18

Hello List My problem: If I run stunnel I regular get the below error: [.] stunnel 5.46 on x86-pc-msvc-1500 platform [.] Compiled/running with OpenSSL 1.0.2o-fips 27 Mar 2018 [.] Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI [ ] errno: (*_errno()) [ ] Running on Windows 6.2 [.] Reading configuration from file stunnel.conf [.] UTF-8 byte order mark detected [.] FIPS mode disabled [ ] Compression disabled [ ] No PRNG seeding was required [ ] Initializing service [smtps] [ ] GUI message loop initialized [ ] Ciphers: HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK [ ] TLS options: 0x03000004 (+0x00000000, -0x00000000) [ ] Loading certificate from file: stunnel.pem [ ] Certificate loaded from file: stunnel.pem [ ] Loading private key from file: stunnel.pem [ ] Private key loaded from file: stunnel.pem [ ] Private key check succeeded [:] Service [smtps] needs authentication to prevent MITM attacks [.] Configuration successful [ ] Binding service [smtps] [ ] Listening file descriptor created (FD=676) [ ] Setting accept socket options (FD=676) [ ] Option SO_EXCLUSIVEADDRUSE set on accept socket >>> [!] bind: Address already in use (WSAEADDRINUSE) (10048) <<<< [!] Error binding service [smtps] to 192.168.10.62:11465 [!] Could not bind any accepting port [ ] Deallocating section defaults [ ] Unbinding service [smtps] [ ] Service [smtps] closed [ ] Deallocating section [smtps] I had the same problem with the previous versions aswell. To temporary resolv the problem I have to change the listen port to another number. Reread the config file and let the stunnel GUI open. Then all is working until I close the GUI (not each time but most of). My system: - Windows 2016 Server - stunnel-5.46 - stunnel installed as service and GUI My config file (relevant part): taskbar = yes client=yes [smtps] ;delay = yes accept = 192.168.10.62:11466 connect = server.domain.ch:465 cert = stunnel.pem local = 192.168.10.53 (this is dedicated address) I found a similar threat in the archives (but on Linux): https://www.stunnel.org/pipermail/stunnel-users/2018-February/005935.html Here is Microsoft's describtion about WSAEADDRINUSE) (10048): https://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).… All helps are welcome. Kind regards, -- Martin Schweizer PC-Service M. Schweizer GmbH; Bannholzstrasse 6; Postfach 132; CH-8608 Bubikon; Tel. +41 55 243 30 00; Fax: +41 55 243 33 22

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port-only accept value binds to 127.0.0.1, instead of the wildcard address
by Poor Yorick 30 May '18

30 May '18

The stunnel 6.45 documentation for "accept" states, "If no host specified, defaults to all IPv4 addresses for the local host." In this case, stunnel actually binds to 127.0.0.1. Indeed, inspection of the relevant code paths reveals that addr_list->passive is never set to 1 in this case. To get stunnel to bind to all addresses, 0.0.0.0 must be explicitly specified. Furthermore, inspection of the code path for the "local" option reveals that addr_list->passive is set to 1 in this case, which seems to be backwards: The documentation for getaddrinfo states that AI_PASSIVE is ignored in this case. The logic for these two cases seems to be reversed. -- Yorick

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stunnel 5.46 released
by Michal Trojnara 28 May '18

28 May '18

Dear Users, I have released version 5.46 of stunnel. Version 5.46, 2018.05.28, urgency: MEDIUM * New features - The default cipher list was updated to a safer value: "HIGH:!aNULL:!SSLv2:!DH:!kDHEPSK". * Bugfixes - Default accept address restored to INADDR_ANY. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 76aab48c28743d78e4b2f6b2dfe49994b6ca74126046c179444f699fae7a84c7 stunnel-5.46.tar.gz 721cc4d7c385743df767a32a53c11477def2440ae20ad4538d8e685f7b7d6538 stunnel-5.46-win32-installer.exe d08a3b3598868064db08d6f0e3a97e3c49dedbf6c8d7f348a613b832eca16dd6 stunnel-5.46-android.zip Best regards, Mike

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Stunnel stopps in Windows Failover Cluster
by Tobias Gillstöm 28 May '18

28 May '18

Hi, I'm having problems with Stunnel in a Windows Failover Cluster. When a failover happens and the stunnel service changes node that it's running on, the service changes node just fine but the stunnel service dosen't appear to be doing anything? If anyone has some prior knowledge about Stunnel in a Windows Failover Cluster i would appreciate the help :)

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stunnel and CAPI on Windows
by Brian Ipsen 23 May '18

23 May '18

Hi I am trying to use the Microsoft certificate store/API for client validation of Windows hosts towards an F5. Everything works, when we use file-based certificates - but for security purposes I would prefer to use the windows certificate store, and set the private key on the client as non-exportable... I have enabled the engineId = capi in the global section of stunnel.conf - and for the required client/service I have: [F5CertAdmin] client=yes accept = 127.0.0.1:1679 connect = w.x.y.z:443 delay = yes sni = ssl79admpki.xxxx.com CApath = C:\Program Files (x86)\stunnel\config\certs CAFile = C:\Program Files (x86)\stunnel\config\certs\GlobalSign-Cert-Chain.pem verify = 2 engineId = capi key = BaaSClientCertificateCP cert = BaaSClientCertificateCP I have a certificate in the local computer certificate store with the supplied name - but stunnel is not able to locate it... Is it because it will look under the user account? If yes, will it look under the local machine when running as local system ? The output from stunnel says: [ ] Initializing service [F5CertAdmin] [ ] Ciphers: HIGH:!DH:!aNULL:!SSLv2 [ ] TLS options: 0x03000004 (+0x03000000, -0x00000000) [ ] Client certificate engine (capi) enabled [ ] Loading certificate from engine ID: BaaSClientCertificateCP [!] ENGINE_ctrl_cmd: Peer suddenly disconnected [ ] Initializing private key on engine ID: BaaSClientCertificateCP [!] ENGINE_load_private_key: 26096080: error:26096080:engine routines:ENGINE_load_private_key:failed loading private key [ ] Loading certificate from file: BaaSClientCertificateCP [!] error queue: 140DC002: error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib [!] error queue: 20074002: error:20074002:BIO routines:FILE_CTRL:system lib [!] SSL_CTX_use_certificate_chain_file: 2001002: error:02001002:system library:fopen:No such file or directory [!] Service [F5CertAdmin]: Failed to initialize TLS context @am6pr03mb3813.eurprd03.prod.outlook.com>Any advice appreciated... Thanks Brian

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stunnel 5.45 released
by Michal Trojnara 21 May '18

21 May '18

Dear Users, I have released version 5.45 of stunnel. Version 5.45, 2018.05.21, urgency: MEDIUM * New feature sponsored by https://loadbalancer.org/ - Implemented delayed deallocation of service sections after configuration file reload. * Other new features - OpenSSL DLLs updated to version 1.0.2o. - Deprecated the sslVersion option. - The "socket" option is now also available in service sections. - Implemented try-restart in the SysV init script (thx to Peter Pentchev). - TLS 1.3 compliant session handling for OpenSSL 1.1.1. - Default "failover" value changed from "rr" to "prio". - New "make check" tests. * Bugfixes - A service no longer refuses to start if binding fails for some (but not all) addresses:ports. - Fixed compression handling with OpenSSL 1.1.0 and later. - _beginthread() replaced with safer _beginthreadex(). - Fixed exception handling in libwrap. - Fixed exec+connect services. - Fixed automatic resolver delaying. - Fixed a Gentoo cross-compilation bug (thx to Joe Harvell). - A number of "make check" framework fixes. - Fixed false postive memory leak logs. - Build fixes for OpenSSL versions down to 0.9.7. - Fixed (again) round-robin failover in the FORK threading model. Home page: https://www.stunnel.org/ Download: https://www.stunnel.org/downloads.html SHA-256 hashes: 548244839b8a4bf4dffea46c97893b203d1b9eed118c3dd6a9ac4d8d02592ee3 stunnel-5.45.tar.gz fc13a224c7ec1290035efe8317c53d62a0980a5ab2efe8930b06aae269fbe873 stunnel-5.45-win32-installer.exe 29025eaed007c62856f16c7a8a22f9713eee9762ed95009f6f91f729c35c0bc0 stunnel-5.45-android.zip Best regards, Mike

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configuring Stunnel
by support 20 May '18

20 May '18

The config as described hereby did work properly a few times giving a secured connection. All of a sudden this is no longer working? Any suggestions? Namens IMS evba Paul Waegemans +32475341310 <mailto:support@imseuro.be> support(a)imseuro.be <http://eu.ntrsupport.com/inquiero/web/digisign/digisign.asp?login=I23EBF509 C6B51A9E700D43&lang=nl>

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