stunnel-users

3 participants
3308 discussions

Stunnel client cuts off the responce of the server
by bernabei＠infinito.it 19 Dec '13

19 Dec '13

Hi,  I use stunnel both the client and server side, but I have problem with server responces because my client app receive only a cut off responce from the server,whose size turns out to be 18 KB. I'd like to know if the BUFFSIZE constant is the maximum size of the message that a client can read.  What if the server sends a message that is bigger than the buffer size? the remaining byte are ignored? if so, how can I do?   Waiting for an answer Thanks in advance Chiara Bernabei

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Reload configuration file in Windows service
by David O'Riva 17 Dec '13

17 Dec '13

Hi, Is there a command line method for instructing stunnel to reload its configuration file when running as a Windows service? I'm trying to use stunnel to replace MySQL's abysmal SSL support on a box that has no GUI interface at all (it will never be logged into interactively). I've poked through the source, and on Windows it looks like the only way to pass signals to it is through a private pipe that is created by and for the stunnel process. Also, does anyone know offhand if existing connections are left unmolested when a configuration reload happens? For production use, I really need to be able to update certs and add and remove components (stunnel services, I guess) without disturbing connections that are in progress. Thanks! -Dave

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Re: [stunnel-users] stunnel and Pegasus Mail
by sawbona＠flashmail.com 15 Dec '13

15 Dec '13

Hello: Thanks to all for your input. Much appreciated. On 15 Dec 2013 at 11:03, you wrote: To: sawbona(a)flashmail.com, Subject: Re: [stunnel-users] stunnel and Pegasus Mail > Just an added note. You need to restart the stunnel ... Yes. I was aware of that. > ... load it as part of the startup process. I have installed it to run as a service so that's what it does. > I would assume you are using windows ... Yes. =-/ > ... so would have to use the task manager to end the task ... Not needed. I have a taskbar icon that on left-click brings up a menu which, among other options, has one to edit and another one to reload the *.conf file. > You need to use a different set of ports for the gmx setup. That did it. =-) I have changed the configuration and it's working perfectly. I did not see the need to do this (maybe not read the manual often enough) but as the log file did not indicate any problems ... LOG5[1796:1960]: Reading configuration from file stunnel.conf LOG5[1796:1960]: FIPS mode is enabled LOG5[1796:1960]: Configuration successful ... I guessed it was something more complex. It would be nice if stunnel had the capability of showing (via the log file) an essential configuration mistake such as two POP3, SMTP or IMAP servers listening on the same ports. Once again, thanks for your input. Cheers, CIV PD: I am able to download mail from gmx.net serves via POP3 using Pegasus Mail and stunnel with no problems whatsoever. Sending mail requires the use of the POP3 userID/PW.

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stunnel and Calypso and GMX: Anyone out there where stunnel works with Calypso?
by greeksalad 15 Dec '13

15 Dec '13

Hallo Everybody! Thanks for 2 replies, which replied, that mail.gmx.net:465 is not a propper ssl server: well, i tried with another email client (Opera), sending AUTH PLAIN and AUTH LOGIN and both worked. So I tried all possible configs in Calypso to get a successful smtp login, but it fails everytime with the same err.msg(see below) The funny thing is, the getting mail, login pop.gmx.net:995 works perfect via stunnel, but smtp fails.... So I want to ask, if there is anyone out there, who works successully with CALYPSO, stunnel and GMX-Provider?? In case, please tell me your settings - would be great! Thanks Johann my last question: ------ trying hard to get stunnel worked with Calypso email client! When I only check emails, it works via stunnel at ssl port 995. But sending email fails with following message from Calypso: *** Sending pending mail from account xyz(a)gmx.net' @ 13.12.2013 01:54 *** Connecting to: '127.0.0.1' -> Successful Logging into the SMTP server as: "xxx" The server does not support any secure password authentication providers Disconnecting -> Successful Failed to send one or more pending messages. Smtp.c[287] Smtp.dll the config file via stunnel looks so: cert = stunnel.pem [gmx-pop3] client = yes accept = 127.0.0.1:108 connect = pop.gmx.net:995 [gmx-smtp] client = yes accept = 127.0.0.1:107 connect = mail.gmx.net:465 the mailserver- config of Calypso is so: pop3: 127.0.0.1 port 108 smtp: 127.0.0.1 port 107 smtp authentication method: user pop account.... So, I am really out of ideas to get the very best email client of the world - CALYPSO - running to send emails via ssl connection, wich my provider forces me to send via ssl from 1.jan.2014... Anyone can help? thanks allot! johann

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stunnel and Pegasus Mail
by sawbona＠flashmail.com 14 Dec '13

14 Dec '13

Hello: I recently came across stunnel as a solution (THE solution) to Pegasus Mail 4.63 having some sort of incompatibility with SSL versions in use at gmx.de and xsmail.com mail services. As I was absolutely unwilling to let go of my trusty PMailo, stunnel proved to be a godsend. =-) At first the problem was with xsmail only and after setting up stunnel everything went along perfectly well, no problems whatsoever. Now, gmx.de is enforcing the use of SSL on ports 993, 995 and 465 instead of 110, 25 and 143 so I edited my stunnel.conf accordingly. --- ;*********************************************************************** ;Configured service ;*********************************************************************** ;Pegasus Mail ;SSL connections to XSMail's servers ;Reason: there's some incompat between PMail 4.63 and SSL - 01/11/2013 [xsmail-POP3-SSL] client = yes accept = 10995 connect = mail.messagingengine.com:995 [xsmail-smtp-SSL] client = yes accept = 10465 connect = mail.messagingengine.com:465 [xsmail-IMAP-SSL] client = yes accept = 10993 connect = mail.messagingengine.com:993 ;Pegasus Mail ;SSL connections to GMX's servers ;Reason: there's some incompat between PMail 4.63 and SSL - 01/11/2013 [gmx-POP3-SSL] client = yes accept = 10995 connect = pop.gmx.net:995 [gmx-smtp-SSL] client = yes accept = 10465 connect = mail.gmx.net:465 [gmx-IMAP-SSL] client = yes accept = 10993 connect = imap.gmx.net:993 --- The issue at hand is that stunnel in not working properly now. This is the log file for a successful connection to xsmail: --- 2013.12.14 17:15:08 LOG5[500:284]: Service [xsmail-POP3-SSL] accepted connection from 127.0.0.1:1182 2013.12.14 17:15:08 LOG5[500:284]: connect_blocking: connected 66.111.4.51:995 2013.12.14 17:15:08 LOG5[500:284]: Service [xsmail-POP3-SSL] connected remote server from 192.168.1.102:1183 2013.12.14 17:15:10 LOG5[500:284]: Connection closed: 58 byte(s) sent to SSL, 112 byte(s) sent to socket --- And this is the log file for a (failed) connection to gmx: --- 2013.12.14 17:17:15 LOG5[500:452]: Service [xsmail-POP3-SSL] accepted connection from 127.0.0.1:1184 2013.12.14 17:17:15 LOG5[500:452]: connect_blocking: connected 66.111.4.52:995 2013.12.14 17:17:15 LOG5[500:452]: Service [xsmail-POP3-SSL] connected remote server from 192.168.1.102:1185 2013.12.14 17:17:21 LOG5[500:452]: Connection closed: 36 byte(s) sent to SSL, 126 byte(s) sent to socket --- The PMail trace is this as follows: [*] Connection established to 127.0.0.1 >> 0016 +OK POP3 ready << 0015 USER 14067985 >> 0005 +OK << 0015 PASS XXXXXXXX >> 0083 -ERR You must use your full username of the form yourusername(a)domain.tld to login Figures ... It is attempting to connect to gmx with xsmail credentials. As youcan see, for some strange reason it is connecting to gmx with xsmail settings. Must be a *.conf file problem but I am at a loss as to what is gong on Any ideas? Thanks in advance, CIV

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stunnel and Calypso: pop3 works, smtp error!
by greeksalad 13 Dec '13

13 Dec '13

Hallo Everybody! trying hard to get stunnel worked with Calypso email client! When I only check emails, it works via stunnel at ssl port 995. But sending email fails with following message from Calypso: *** Sending pending mail from account xyz(a)gmx.net' @ 13.12.2013 01:54 *** Connecting to: '127.0.0.1' -> Successful Logging into the SMTP server as: "xxx" The server does not support any secure password authentication providers Disconnecting -> Successful Failed to send one or more pending messages. Smtp.c[287] Smtp.dll the config file via stunnel looks so: cert = stunnel.pem [gmx-pop3] client = yes accept = 127.0.0.1:108 connect = pop.gmx.net:995 [gmx-smtp] client = yes accept = 127.0.0.1:107 connect = mail.gmx.net:465 the mailserver- config of Calypso is so: pop3: 127.0.0.1 port 108 smtp: 127.0.0.1 port 107 smtp authentication method: user pop account.... So, I am really out of ideas to get the very best email client of the world - CALYPSO - running to send emails via ssl connection, wich my provider forces me to send via ssl from 1.jan.2014... Anyone can help? thanks allot! johann

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Client Authentication - Configuring Service Definition
by j nasty 10 Dec '13

10 Dec '13

Hello Everyone, I’m attempting to consume a web service that requires I authenticate the client using certificates. I was given a (.pfx) certificate locked with a password by the 3rd party vendor. I know I need to convert the current certificate I have into a (.pem) certificate, which I’ll use the openssl tools to accomplish this. I’m a bit new to SSL and network security, thus I’m not entirely sure if I should only be creating a client certificate from the original (.pfx) file or if a server certificate will also need to get created. I used the command: “pkcs12 –in certificate.pfx –out certificate.pem –nodes (–clcerts/-cacerts)” to create my pem certificate. Here is my current configuration: [SSLconnection] debug = 7 CAfile = certificate.pem client = yes verify = 2 accept = 127.0.0.1:9001 connect = web.service.com:443 And the log: (I obscured some information identity information) 2013.12.10 09:36:41 LOG5[9776:8488]: stunnel 4.56 on x86-pc-msvc-1500 platform 2013.12.10 09:36:41 LOG5[9776:8488]: Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 2013.12.10 09:36:41 LOG5[9776:8488]: Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS 2013.12.10 09:36:41 LOG5[9776:8488]: Reading configuration from file stunnel.conf 2013.12.10 09:36:41 LOG5[9776:8488]: FIPS mode is enabled 2013.12.10 09:36:41 LOG5[9776:8488]: Configuration successful 2013.12.10 09:36:44 LOG5[9776:9024]: Service [SSLconnection] accepted connection from 127.0.0.1:60659 2013.12.10 09:36:44 LOG5[9776:9024]: connect_blocking: connected web.service.com:443 2013.12.10 09:36:44 LOG5[9776:9024]: Service [SSLconnection] connected remote server from 192.168.50.211:60660 2013.12.10 09:36:44 LOG5[9776:9024]: Certificate accepted: depth=1, /C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C 2013.12.10 09:36:44 LOG5[9776:9024]: Certificate accepted: depth=1, /C=US/O=Entrust, Inc./OU=www.entrust.net/rpa is incorporated by reference/OU=(c) 2009 Entrust, Inc./CN=Entrust Certification Authority - L1C 2013.12.10 09:36:44 LOG4[9776:9024]: CERT: Certificate not found in local repository 2013.12.10 09:36:44 LOG4[9776:9024]: Certificate check failed: depth=0, /C=US/ST=Texas/L=Austin/O=OName/CN=web.service.com 2013.12.10 09:36:44 LOG3[9776:9024]: SSL_connect: 14090086: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed 2013.12.10 09:36:44 LOG5[9776:9024]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket Looks like my problem is stemming from "Certificate not found in local repository"? Thank you in advance for any assistance, Jake

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connect error 0 running on ARM platform
by FX35 10 Dec '13

10 Dec '13

Hello, Running stunnel 4?56 on an ARM platform (ARM926EJ) with Linux 2.6.36.4, I encounter the following error : the call to connect() return -1, but errno is set to 0 ! Is somebody meet the same error ? Is the problem in stunnel program ? An other application, using non blocking call to connect() run correctly. Thanks for help. FWX.

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newbie - sTunnel examples and users archive searching
by Attila Horvath 10 Dec '13

10 Dec '13

All I'm new to sTunnel and tunneling in general. Have a couple of quick questions... [1] It's been *many* years since I've used or subscribed to mailman. Is there a way of searching the mail archives online for specific topics and/or keywords without downloading everything so previously asked questions aren't repeated ad nauseam? [2] I have a specific need which I believe sTunnel will solve but not sure how to go about it. I want to access a machine that is behind a restrictive firewall from outside the network to perform perform remote desktop control. The firewall permits HTTP, HTTPS protocols and some similar common protocols. However, I do not have access to the firewall server ergo have no control/say over which ports are blocked or forwarded. I have heard about HTTP hole punching via ssl and http-tunnel - eg: http://sebsauvage.net/punching/. It sounds like sTunnel is similar/identical. Can someone point me to specific examples on how to use sTunnel as well as any examples that might satisfy my need? Is proxy server necessary to accomplish this? To date I've been using Teamviewer to access/control my machine(s) in conjunction with things like AdVOR, TOR, or UltraSurf. While these are excellent applications and their free use are limited, I do not expect this will last forever. I prefer to use and trust 'open source' applications where/when I can. Much appreciated and thank you in advance. Attila

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error invalid stunnel.conf - No limit of clients
by Christian Huber 09 Dec '13

09 Dec '13

Hi, I just installed stunnel for my email programm courier. I edited the stunnel.conf as followed but am unfortunatly becoming the message from stunnel: invalid stunnel.conf No limit detected for the number of clients stunnel 4.56 on x86-pc-msvc-1500 platform Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013 Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS Reading configuration from file stunnel.conf FIPS_mode_set: 2D07808C: error:2D07808C:FIPS routines:FIPS_module_mode_set:unsupported platform Line 11: "[POP3 T-Online]": Failed to initialize SSL Server is down my stunnel.conf is as followed: # GLOBAL OPTIONS client = yes output = stunnel-log.txt debug=4 taskbar = yes # SERVICE-LEVEL OPTIONS [POP3 T-Online] accept = 127.0.0.1:108 connect = securepop.t-online.de:995 [SMTP T-Online] accept = 127.0.0.1:107 connect = securesmtp.t-online.de:587 [POP3 web.de] accept = 127.0.0.1:106 connect = pop3.web.de:995 [SMTP web.de] accept = 127.0.0.1:105 connect = smtp.web.de:587 [POP3 STRATO] accept = 127.0.0.1:104 connect = pop3.strato.de:995 [SMTP STRATO] accept = 127.0.0.1:103 connect = smtp.strato.de:465 [POP3 GMX ] accept = 127.0.0.1:102 connect = pop.gmx.net:995 [SMTP GMX ] accept = 127.0.0.1:101 connect = mail.gmx.net:465 ___________________ Would be nice if someone could tell me what is wrong! Greetings Christian Huber

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stunnel-users