stunnel-users

stunnel-users@stunnel.org

6 participants
3294 discussions

Memleak sTunnel Win32 5.41 ?
by Dod 12 Jun '17

12 Jun '17

Hello, I just noticed that stunnel memory usage is growing slowly but surely using 5.41 on Win7 64 Bits. Using a few POP3 SSL tunnels. Now it is using 290MB memory I don't know if it is since 5.41 (didn't pay attention). Is there a way to trace/log something that could be useful ? (apart from the process memory usage curve that I guess will not help). regards.

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TLS-SRP patch
by Kevin Sheldrake 06 Jun '17

06 Jun '17

Hello I recently produced a patch that permits use of TLS-SRP; it is based on the TLS-PSK code and this blog post: https://matthewarcus.wordpress.com/2014/05/10/srp-in-openssl/ It’s not the cleanest of code but it does work as a POC. The patch is available here: https://github.com/rtfcode/tls-srp The README.txt provides some info on testing the patch and how it might be used to help dev web browsers and servers that support TLS-SRP (for IoT work). There is a page on the forthcoming OWASP Summit ‘TLS for Local IoT’ workshop (for which it was developed) at: https://owaspsummit.org/Working-Sessions/IoT/TLS-for-Local-IoT.html In terms of using TLS-SRP support in stunnel as a proxy, it might be useful as a replacement for TLS-PSK where the credentials are user-memorable (pass phrase, for example) as TLS-SRP has lower entropy requirements than TLS-PSK. For example, the creds could be stored in the user’s head rather than in a file and be less open to compromise if a device was seized. I don’t know if that’s useful for anyone; it’s just a thought. Thanks Kev

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Connect to sub-directory path
by Shamim Uz Zaman 25 May '17

25 May '17

Hi Looking for an example to connect to subdirectory path such that [connect] client = yes accept = 127.0.0.1:441 connect = xxx.website.com:443/Connect/topath verifyChain = yes verifyPeer=yes CAfile = ca-certs.pem checkHost = xxx.mywebsite.com OCSPaia = yes When I only use xxx.mywebsite.com:443 it works. However, below three url gives TCP error (Unknown TCP service) xxx.mywebsite.com:443/Connect/topath xxx.mywebsite.com/Connect/topath https://xxx.mywebsite.com/Connect/topath My proxy connection requires to translate to the directory path of the domain. Regards, *Shamim Zaman*

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Stunnel Connectivity Issue
by Dheeraj Gautam 24 May '17

24 May '17

Hi Team, We are using 5.41 release of Stunnel software to establish TCP connection with remote server using by TLSV1.2 protocol. Enclosed configuration file wherein we are trying to establish TCP connection with one my server along with provided certificate and key which are pointed in config file. Could you please let us know what parameters we are missing here due to which connection is not establishing with remote server. Although, stunnel logs indicating that configuration successful, but in logs no where is mentioned about the connection is it connected or not, below is the artifact for your easy ref. Could you please help us here to resolve this issue. Regards, Dheeraj Gautam -- www.arborfs.com This e-mail and any attachment are confidential and contain proprietary information, some or all of which may be legally privileged. It is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient, please notify the author immediately by telephone or by replying to this e-mail, and then delete all copies of the e-mail on your system. If you are not the intended recipient, you must not use, disclose, distribute, copy, print or rely on this e-mail. Whilst we have taken reasonable precautions to ensure that this e-mail and any attachment has been checked for viruses, we cannot guarantee that they are virus free and we cannot accept liability for any damage sustained as a result of software viruses. We would advise that you carry out your own virus checks, especially before opening an attachment.

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Stunnel on Suse 8.1, connections refused, pid remains
by InvalidPath 09 May '17

09 May '17

So I have this server, I can start stunnel via /etc/rc.d/stunnel start. The pid is there as witnessed by ps -aux | grep stunnel, I have 4 customers that access this server. The customers pull data files that contain certain client records. Anyway my test user connects to the server and is able to pull a handful of files before their process begins timing out. When this happens I can no longer SSH to the host without restarting stunnel. Weird thing is, is that I can see the pid still running when this happens. I have the debug = 7 but the log files according to stunnel - version is set to a level of 5. No clue where it''s getting a 5 from. But I am unable to determine why or what is causing this. And it's starting to cost the company lost revenue. Any help would be greatly appreciated. Ben

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Graceful config reload when -fd option was used
by z a 09 May '17

09 May '17

Hi, Since version 4.30, sending a HUP signal to a running stunnel process will cause it to gracefully reload with the given config file. Is there a way to accomplish this when the running stunnel process was started with the "-fd" flag as in the example below? cat foo.conf | stunnel-fd 0 I tried writing to /proc/$pid/fd/0 but that didn't work. I'm hoping someone here has overcome this issue and might be able to whisper a hint in my direction. I am on Centos 7.2. Thanks

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Trouble with stunnel.conf (version 5.41)
by Mark Garciano 02 May '17

02 May '17

Hi Stunnel users, Any ideas why I get a "server down" message"? Below is the conf file: ;--------------------------------------------------------------------------- ; ************************************************************************** ; * Global options * ; ************************************************************************** ; ; Debugging stuff (may useful for troubleshooting) debug = 7 output = stunnel.log ;Disable FIPS mode to allow non-approved protocols and algorithms fips = no ;************************************************************************** ; * Service defaults may also be specified in individual service sections * ; ************************************************************************** ; Disable support for insecure SSLv2 protocol options = NO_SSLv2 key = stunnel.pem cert = stunnel.pem client = yes accept = 5001 connect = XXXXXXXXXXX.com:6443 TIMEOUTclose = 0 TIMEOUTconnect = 200 TIMEOUTidle = 86400 ;--------------------------------------------------------------------------- HERE IS THE LOG WINDOW MESSAGE: [!] Server is down [ ] Running on Windows 6.1 [.] Reading configuration from file stunnel.conf [.] UTF-8 byte order mark detected [.] FIPS mode disabled [ ] Compression disabled [ ] Snagged 64 random bytes from C:/.rnd [ ] Wrote 1024 new random bytes to C:/.rnd [ ] PRNG seeded successfully [ ] Initializing inetd mode configuration [!] Service [(null)]: 'accept' option is only allowed in a [section] Mark Garciano Systems Programmer II USC Libraries Integrated Library Systems 213-740-3568

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Re: [stunnel-users] Help in setting stunnel in client mode to connect webservice in mutual authentication
by Chokkalingam, Jothish 28 Apr '17

28 Apr '17

Hi Can you help in sorting it out below scenario We have a URL whose TLS is 1.0 and now it is being upgraded to 1.2. Since the current application doesn't support V1.0 I am planning to use stunnel in between to fix the gap. Can you help if my below config is correct or not. The communication between client and server is MASSL(mutual authentication SSL) [Billpay46200] client = yes CApath = /apps/bss/CCBTrustStore-->trust store where the remote webservice certificates are stored in cert format accept = 46200-->port configured from client machine to connect using http connect = xxx.in.xxx.com.au:46200-->port where the incoming http request need to be changed from http to https cert = /stunnel/bin/client.pem-->identity certificate used for client key = /stunnel/bin/key.pem-->corresponding key for the above identity certificate. While hitting using the URL http://localhost:46200 it is shown in stunnel log as below 2017.04.28 17:17:51 LOG5[2627:3]: Billpay46200 accepted connection from 127.0.0.1:58382 2017.04.28 17:17:51 LOG5[2627:3]: Billpay46200 connected remote server from 10.116.194.24:58383 2017.04.28 17:17:51 LOG3[2627:3]: SSL_connect: Peer suddenly disconnected 2017.04.28 17:17:51 LOG5[2627:3]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket Thanks and Regards, Jothish TIBCO TSD Ph. : +91 44 39263958 Mobile : +91 9884040171 Support : +91 9962007110 OC : jothish.chokkalingam Group mail:- Telstra.psm.tsd.tibco(a)accenture.com ________________________________ This message is for the designated recipient only and may contain privileged, proprietary, or otherwise confidential information. If you have received it in error, please notify the sender immediately and delete the original. Any other use of the e-mail by you is prohibited. Where allowed by local law, electronic communications with Accenture and its affiliates, including e-mail and instant messaging (including content), may be scanned by our systems for the purposes of information security and assessment of internal compliance with Accenture policy. ______________________________________________________________________________________ www.accenture.com

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Remove session callback
by Florian Gossin 19 Apr '17

19 Apr '17

Hi, I have updated to the latest 5.41 version. I was troubleshooting another problem and I discovered dozens of lines in the log file with "Remove session callback, Deallocating application specific data for session connect address": 2017.04.19 14:49:49 LOG7[17483]: Service [pgbouncer-client] started 2017.04.19 14:49:49 LOG7[17483]: Option TCP_NODELAY set on local socket 2017.04.19 14:49:49 LOG5[17483]: Service [pgbouncer-client] accepted connection from x.x.x.x:36018 2017.04.19 14:49:49 LOG6[17483]: Peer certificate required 2017.04.19 14:49:49 LOG7[17483]: TLS state (accept): before/accept initialization 2017.04.19 14:49:49 LOG7[17483]: SNI: no virtual services defined 2017.04.19 14:49:49 LOG7[17483]: TLS state (accept): SSLv3 read client hello A 2017.04.19 14:49:49 LOG7[17483]: TLS state (accept): SSLv3 write server hello A 2017.04.19 14:49:49 LOG7[17483]: TLS state (accept): SSLv3 write change cipher spec A 2017.04.19 14:49:49 LOG7[17483]: TLS state (accept): SSLv3 write finished A 2017.04.19 14:49:49 LOG7[17483]: TLS state (accept): SSLv3 flush data 2017.04.19 14:49:49 LOG7[17483]: TLS state (accept): SSLv3 read finished A 2017.04.19 14:49:49 LOG7[17483]: Remove session callback 2017.04.19 14:49:49 LOG7[17483]: Deallocating application specific data for session connect address 2017.04.19 14:49:49 LOG7[17483]: Remove session callback 2017.04.19 14:49:49 LOG7[17483]: Deallocating application specific data for session connect address ... Can anyone explain me what it is about ? Thank you, Florian

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Windows Server 2012 stunnel service
by Adam Shackleton 18 Apr '17

18 Apr '17

Hi All I'm running stunnel on Windows Server 2012 R2 with the following config: [test-qa] client = yes accept = 127.0.0.1:8080 connect = webaddress.com:443 cert = API-q-response.pfx CAfile = ca-certs.pem OCSPaia = yes When I start the GUI I'm prompted for the certificate password then and then stunnel works fine, but I need it to run as a service. I've tried using the start menu stunnel Service Install button, I've also tried opening a command prompt in C:\Program Files (x86)\stunnel\config and running C:\Program Files (x86)\stunnel\bin\stunnel.exe -install, and I've also tried moving the config file and certs to the \bin directory and running stunnel -install there as well. In all case the service installs ok, and when you run it, it starts (I can see it in the services tool), you can click the stunnel Configuration File Reload button in the start menu and it says the configuration was successfully reloaded, but it doesn't work when I try to use it. I've noticed two things that might be relevant: 1. At no point does it prompt me for the certificate password like it does when I load the GUI 2. The dialog boxes that open when the service is installed or started say "stunnel 5.40 on Win32 (not configured) [cid:image001.png@01D2B81E.BD3E6BC0] If anyone has any advice that would be greatly appreciated. Thanks Adam

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