- stunnel-users - stunnel.org

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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