- stunnel-users - stunnel.org

Re: [stunnel-users] connect error 0 running on ARM platform
by FX35 14 Jan '14

14 Jan '14

> Message: 3 > Date: Fri, 10 Jan 2014 15:27:10 +0100 > From: Michal Trojnara <Michal.Trojnara(a)mirt.net> > To: stunnel-users(a)stunnel.org > Subject: Re: [stunnel-users] connect error 0 running on ARM platform > Message-ID: <52D0033E.1060109(a)mirt.net> > Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" > > On 01/09/2014 06:02 PM, FX35 wrote: >> Running stunnel 4.56 or 5.00 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 ! >> >> If stunnel is configured to use fork mode instead of pthread mode, >> the problem disapear. >> >> So it seems there is a problem, cross-compiling the program, with >> errno or __errno_location() in the program generated with pthread. >> >> I add the definition of _REENTRANT, without success ... >> >> (See $H1 at http://pauillac.inria.fr/~xleroy/linuxthreads/faq.html) >> >> Is somebody meet the same error ? > > The errno definition in the Android framework (as an example of > Linux/ARM platform) is: > > /* internal function returning the address of the thread-specific > errno */ > extern volatile int* __errno(void); > > /* a macro expanding to the errno l-value */ > #define errno (*__errno()) > > > It seems okay. > > How do you reproduce this problem? What are the stunnel debug logs when > it happens? > > Mike Hello Mike, It seems that the errno variable is not correcly set/updated in C library, using pthread mode. Sample: errno = -1; ret = connect(...); if( ret == -1 ) { printf("errno=%d\n",errno); } will displays value -1 for errno, not EINPROGRESS or EWOULDBLOCK ! errno is not updated ... So errno doen't reflect the real value. Map file of stunnel programm shows _errno_localion(), as you wrote. Perhaps is there a bug in uClib ? Here is the result of ldd command: # ldd stunnel libssl.so.1.0.0 => /usr/lib/libssl.so.1.0.0 (0x400f3000) libcrypto.so.1.0.0 => /usr/lib/libcrypto.so.1.0.0 (0x4013d000) libz.so.1 => /usr/lib/libz.so.1 (0x4027c000) libdl.so.0 => /lib/libdl.so.0 (0x4029b000) libutil.so.0 => /lib/libutil.so.0 (0x4009e000) libpthread.so.0 => /lib/libpthread.so.0 (0x400a7000) libc.so.0 => /lib/libc.so.0 (0x402a6000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x400c6000) ld-uClibc.so.0 => /lib/ld-uClibc.so.0 (0x4008f000) Thanks for help. Regards, FWX.

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connect error 0 running on ARM platform
by FX35 10 Jan '14

10 Jan '14

Hello, Running stunnel 4.56 or 5.00 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 ! If stunnel is configured to use fork mode instead of pthread mode, the problem disapear. So it seems there is a problem, cross-compiling the program, with errno or __errno_location() in the program generated with pthread. I add the definition of _REENTRANT, without success ... (See $H1 at http://pauillac.inria.fr/~xleroy/linuxthreads/faq.html) Is somebody meet the same error ? Thanks for help. FWX.

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What checks are made for verify=2
by Ender Erel 10 Jan '14

10 Jan '14

Hi All, I have been searching the web for information on what checks are made for verify=2 but I can't find any detailed information. What exactly goes on when I use verify=2 in client mode? Does stunnel only check if the certificate is signed by a valid CA? Or are any other X.509 attributes checked? Does it disallow settings like "CA=true"? I would really appreciate it if someone could point me where I can find about details of various verify levels. Thanks, Ender Erel

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Stunnel cuts off message
by bernabei＠infinito.it 09 Jan '14

09 Jan '14

Hi,     I'd like to know why Stunnel cuts off messages. I use stunnel both the client and server side,the problem is that my client receives only a cutted off responce from the server,whose size turns out to be 18 KB. Hope an answer Thanks Chiara Bernabei

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Error starting STunnel
by Ted Roeloffzen 09 Jan '14

09 Jan '14

Hi All, I've installed and configured my STunnel. But it won't start. The error i'm getting is: PEM_read_bio:no start line I use the certificate isn't valid, but it's a certificate that i received from a third party and should be correct. Do i have to add something to or alter the certificate so that STUnnel can work with it? kind regards, Ted

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Stunnel should allow TLS v1.1, 1.2 in fips mode
by Douglas Harris (M) 07 Jan '14

07 Jan '14

Currently, stunnel only allows "sslVersion = TLSv1" when "fips = yes". TLSv1.1 and TLSv1.2 should also be permissible values for sslVersion in fips mode. -Doug

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Invitation to connect on LinkedIn
by Manjula Hettiarachchi 30 Dec '13

30 Dec '13

LinkedIn ------------ stunnel, I'd like to add you to my professional network on LinkedIn. - Manjula Manjula Hettiarachchi CTO at UGEN Sri Lanka Confirm that you know Manjula Hettiarachchi: https://www.linkedin.com/e/7575ev-hptlhkon-2z/isd/18944228150/nRr0DNUW/?hs=… -- You are receiving Invitation to Connect emails. Click to unsubscribe: http://www.linkedin.com/e/7575ev-hptlhkon-2z/vyS7IfxEDIThLYYA4jSpNuY0D7kTJI… (c) 2012 LinkedIn Corporation. 2029 Stierlin Ct, Mountain View, CA 94043, USA.

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After upgrading OpenSSL, stunnel times out trying to receive emails
by James Brown 23 Dec '13

23 Dec '13

I've upgraded the OpenSSL on my test mail server, and recompiled Stunnel. Now when Stunnel receives an email it gets stuck on the "SSL state (accept): before/accept initialization" step and times out after a few minutes. Log: 2013.12.24 10:42:58 LOG7[86137:140735299320160]: Service [ssmtp] accepted (FD=3) from 192.168.1.10:54839 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] started 2013.12.24 10:42:58 LOG7[86137:4392841216]: Waiting for a libwrap process 2013.12.24 10:42:58 LOG7[86137:4392841216]: Acquired libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Releasing libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Released libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] permitted by libwrap from 192.168.1.10:54839 2013.12.24 10:42:58 LOG5[86137:4392841216]: Service [ssmtp] accepted connection from 192.168.1.10:54839 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): before/accept initialization 2013.12.24 10:42:58 LOG7[86137:4392841216]: SNI: no virtual services defined 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 read client hello A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 write server hello A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 write certificate A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 write key exchange A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 write server done A 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): SSLv3 flush data 2013.12.24 10:42:58 LOG3[86137:4392841216]: SSL_accept: Peer suddenly disconnected 2013.12.24 10:42:58 LOG5[86137:4392841216]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.12.24 10:42:58 LOG7[86137:4392841216]: Local socket (FD=3) closed 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] finished (0 left) 2013.12.24 10:42:58 LOG7[86137:140735299320160]: Service [ssmtp] accepted (FD=3) from 192.168.1.10:54840 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] started 2013.12.24 10:42:58 LOG7[86137:4392841216]: Waiting for a libwrap process 2013.12.24 10:42:58 LOG7[86137:4392841216]: Acquired libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Releasing libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Released libwrap process #1 2013.12.24 10:42:58 LOG7[86137:4392841216]: Service [ssmtp] permitted by libwrap from 192.168.1.10:54840 2013.12.24 10:42:58 LOG5[86137:4392841216]: Service [ssmtp] accepted connection from 192.168.1.10:54840 2013.12.24 10:42:58 LOG7[86137:4392841216]: SSL state (accept): before/accept initialization 2013.12.24 10:47:58 LOG6[86137:4392841216]: init_ssl: s_poll_wait: TIMEOUTbusy exceeded: sending reset 2013.12.24 10:47:58 LOG5[86137:4392841216]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket 2013.12.24 10:47:58 LOG7[86137:4392841216]: Local socket (FD=3) closed 2013.12.24 10:47:58 LOG7[86137:4392841216]: Service [ssmtp] finished (0 left) Any suggestions? It was working fine before I upgraded OpenSSL to 1.00e. System is a Mac OS X 10.7.5 box. Thanks, James.

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Error on attempt to launch Stunnel
by Tracy Drake - QI-C 20 Dec '13

20 Dec '13

Hello! I wonder if you can offer insight as to the significance of the following error on attempt to launch the new 4.56 Stunnel... [image: Inline image 1] Perhaps it was simply a botched/incomplete installation but I wanted to reach out before just attempting a reinstall. Thanks in advance! -- Tracy Drake CSM Senior Consultant GSA-FAS FAME Contractor URSA & INFOConnect Support & Training Team Lead 704-987-1211 tracy.drake(a)gsa.gov

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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 16 Dec '13

16 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 16 Dec '13

16 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 15 Dec '13

15 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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t-online, web.de E-mail with Courier
by Christian Huber 08 Dec '13

08 Dec '13

Hi, stunnel is now working with the fips=no global option without error! My e-mail programm courier is working with the servers from strato and gmx! But with t-online it is not working at the moment! I can not login into the pop3 server! >From courier I get the message: Sendrecv.c[229] Pop3.dll recv() failed WINSOCK Error: Connection reset. (The mail server terminated the connection. With web.de I can login into the pop3 server and receive mails. But sending mails is not sucessfull! >From courier I get the message: Sendrecv.c[188] Smtp.dll recv(MSG_PEEK) failed WINSOCK Error: Connection reset. (The mail server terminated the connection. Would be nice if someone has a solution! My stunnel.conf: # GLOBAL OPTIONS client = yes fips=no 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

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stunnel domain name resolution bug
by David Slachta 07 Dec '13

07 Dec '13

I'm new to the mailing lists so I hope it's the correct way to report a bug. There's an issue with resolving domain names. I'm connecting an stunnel client to a server that sits on a computer which IP address is dynamic. Therefore I'm using a dyndns for the IP address of the server. When the IP address of the server is changed, the stunnel client doesn't update the name resolution of the dyndns name and tries to connect to the old IP which is of course unsuccessful. This can be resolved only by exiting and starting stunnel client again when a new domain name resolution is made. Would it be possible to add a functionality to the stunnel that wouldn't cache the name resolution but try to resolve the domain names every time there's a connection request? I'm using a Windows OS for both server and client, not sure if that makes a difference. Thanks! David

2 1

Re: [stunnel-users] stunnel domain name resolution bug
by Brian Wilkins 06 Dec '13

06 Dec '13

Sent you traffic from Sept 19th from Trojnara. May be helpful On Dec 6, 2013 6:11 PM, "Brian Wilkins" <bwilkins(a)gmail.com> wrote: > See my forward > On Dec 6, 2013 5:53 PM, "David Slachta" <elpin(a)volny.cz> wrote: > >> I'm new to the mailing lists so I hope it's the correct way to report a >> bug. >> >> There's an issue with resolving domain names. I'm connecting an stunnel >> client to a server that sits on a computer which IP address is dynamic. >> Therefore I'm using a dyndns for the IP address of the server. When the IP >> address of the server is changed, the stunnel client doesn't update the >> name resolution of the dyndns name and tries to connect to the old IP which >> is of course unsuccessful. This can be resolved only by exiting and >> starting stunnel client again when a new domain name resolution is made. >> >> Would it be possible to add a functionality to the stunnel that wouldn't >> cache the name resolution but try to resolve the domain names every time >> there's a connection request? >> >> I'm using a Windows OS for both server and client, not sure if that makes >> a difference. >> >> Thanks! >> David >> >> _______________________________________________ >> stunnel-users mailing list >> stunnel-users(a)stunnel.org >> https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users >> >>

1 0

Hostname verification, support for, and patches
by fslama＠comcast.net 06 Dec '13

06 Dec '13

After scouring the net I've found several isolated discussions regarding stunnel hostname validation. And also some patches that seem to implement hostname validation: https://www.stunnel.org/pipermail/stunnel-users/2010-March/002613.html I have a requirement to have stunnel (4.56) validate client certificates and their identity by comparing the its CNAME against the source address. I recall reading one response (which I can't find at the moment) from Marzena Trojnara indicating that this feature won't be supported. If so, can you explain the rational? Are there sanctioned patches out there today? Regards, -Fred

4 3

setup stunnel problem
by edu.bit.es＠gmail.com 20 Nov '13

20 Nov '13

Hi everybody, I'm absolutely new in stunnel. I came around because of a post in the google forums about making Symantec System Recovery mail through smtp.gmail.com. Symantec is not capable of doing SSL/TLS so I need a solution like stunnel. But I've an issue: it doesn't seem to work :) I installed the program ok, and configured in the following way: cert=stunnel.pem socket = l:TCP_NODELAY=1 socket= r:TCP_NODELAY=1 [gmail-smtp] client=yes accept:127.0.0.1:25 connect= smtp.gamil.com:465 EOF The server is listening on port 127.0.0.1:25 but when I do a telnet to that port gives an error and doesn't seem to tunnel me to smtp.gmail.com. On the other hand, I configured outlook to use that tunnel but gives an error stating it can reach the smtp server. What am I doing wrong? Should I change the TLS version? Best regards and thanks in advance.

2 7

Stunnel with gmail not working on RHEL 6.4
by André Luís 17 Nov '13

17 Nov '13

Hello, I am trying to setup stunnel to send email using gmail smtp server trough Oracle Database. I first tested on my windows machine. I installed and configured stunnel and it worked fine.But now I tried to do the same on our server (RHEL 6.4) and it doesn't work. I can successfuly telnet the 25 port: [root@server1 stunnel]# telnet localhost 25Trying 127.0.0.1...Connected to localhost.Escape character is '^]'.220 mx.google.com ESMTP so2sm18740691pbc.5 - gsmtp When I send the email, i receive this error: SMTP permanent error: 534 5.7.14 54 ef10sm21262349pac.1 - gsmtp anyone have any idea? the stunnel.conf: pid = /stunnel.pidoutput = /var/log/stunnel.logcompression = zlibsslVersion = alloptions = NO_SSLv2debug = 7 [gmail-smtp]client = yesaccept = localhost:25connect = smtp.gmail.com:465 Here is the Stunnel log:2013.11.17 15:58:34 LOG7[23729:139952118699968]: gmail-smtp accepted FD=13 from 127.0.0.1:560892013.11.17 15:58:34 LOG7[23729:139952118695680]: gmail-smtp started2013.11.17 15:58:34 LOG7[23729:139952118695680]: FD 13 in non-blocking mode2013.11.17 15:58:34 LOG7[23729:139952118695680]: Waiting for a libwrap process2013.11.17 15:58:34 LOG7[23729:139952118695680]: Acquired libwrap process #02013.11.17 15:58:34 LOG7[23729:139952118695680]: Releasing libwrap process #02013.11.17 15:58:34 LOG7[23729:139952118695680]: Released libwrap process #02013.11.17 15:58:34 LOG7[23729:139952118695680]: gmail-smtp permitted by libwrap from 127.0.0.1:560892013.11.17 15:58:34 LOG5[23729:139952118695680]: gmail-smtp accepted connection from 127.0.0.1:560892013.11.17 15:58:34 LOG7[23729:139952118695680]: FD 14 in non-blocking mode2013.11.17 15:58:34 LOG6[23729:139952118695680]: connect_blocking: connecting 74.125.129.108:4652013.11.17 15:58:34 LOG7[23729:139952118695680]: connect_blocking: s_poll_wait 74.125.129.108:465: waiting 10 seconds2013.11.17 15:58:34 LOG5[23729:139952118695680]: connect_blocking: connected 74.125.129.108:4652013.11.17 15:58:34 LOG5[23729:139952118695680]: gmail-smtp connected remote server from 172.31.22.161:510672013.11.17 15:58:34 LOG7[23729:139952118695680]: Remote FD=14 initialized2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): before/connect initialization2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv2/v3 write client hello A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server hello A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server certificate A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server done A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write client key exchange A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write change cipher spec A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write finished A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 flush data2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server session ticket A2013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read finished A2013.11.17 15:58:34 LOG7[23729:139952118695680]: 1 items in the session cache2013.11.17 15:58:34 LOG7[23729:139952118695680]: 1 client connects (SSL_connect())2013.11.17 15:58:34 LOG7[23729:139952118695680]: 1 client connects that finished2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 client renegotiations requested2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 server connects (SSL_accept())2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 server connects that finished2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 server renegotiations requested2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 session cache hits2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 external session cache hits2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 session cache misses2013.11.17 15:58:34 LOG7[23729:139952118695680]: 0 session cache timeouts2013.11.17 15:58:34 LOG6[23729:139952118695680]: SSL connected: new session negotiated2013.11.17 15:58:34 LOG6[23729:139952118695680]: Negotiated ciphers: RC4-SHA SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=SHA12013.11.17 15:58:34 LOG7[23729:139952118695680]: SSL socket closed on SSL_read2013.11.17 15:58:34 LOG7[23729:139952118695680]: Socket write shutdown2013.11.17 15:58:34 LOG5[23729:139952118695680]: Connection closed: 90 bytes sent to SSL, 860 bytes sent to socket2013.11.17 15:58:34 LOG7[23729:139952118695680]: gmail-smtp finished (0 left)2013.11.17 16:01:01 LOG7[23729:139952118699968]: gmail-smtp accepted FD=13 from 127.0.0.1:561202013.11.17 16:01:01 LOG7[23729:139952118695680]: gmail-smtp started2013.11.17 16:01:01 LOG7[23729:139952118695680]: FD 13 in non-blocking mode2013.11.17 16:01:01 LOG7[23729:139952118695680]: Waiting for a libwrap process2013.11.17 16:01:01 LOG7[23729:139952118695680]: Acquired libwrap process #02013.11.17 16:01:01 LOG7[23729:139952118695680]: Releasing libwrap process #02013.11.17 16:01:01 LOG7[23729:139952118695680]: Released libwrap process #02013.11.17 16:01:01 LOG7[23729:139952118695680]: gmail-smtp permitted by libwrap from 127.0.0.1:561202013.11.17 16:01:01 LOG5[23729:139952118695680]: gmail-smtp accepted connection from 127.0.0.1:561202013.11.17 16:01:01 LOG7[23729:139952118695680]: FD 14 in non-blocking mode2013.11.17 16:01:01 LOG6[23729:139952118695680]: connect_blocking: connecting 74.125.129.109:4652013.11.17 16:01:01 LOG7[23729:139952118695680]: connect_blocking: s_poll_wait 74.125.129.109:465: waiting 10 seconds2013.11.17 16:01:01 LOG5[23729:139952118695680]: connect_blocking: connected 74.125.129.109:4652013.11.17 16:01:01 LOG5[23729:139952118695680]: gmail-smtp connected remote server from 172.31.22.161:569712013.11.17 16:01:01 LOG7[23729:139952118695680]: Remote FD=14 initialized2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): before/connect initialization2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write client hello A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read server hello A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 read finished A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write change cipher spec A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 write finished A2013.11.17 16:01:01 LOG7[23729:139952118695680]: SSL state (connect): SSLv3 flush data2013.11.17 16:01:01 LOG7[23729:139952118695680]: 1 items in the session cache2013.11.17 16:01:01 LOG7[23729:139952118695680]: 2 client connects (SSL_connect())2013.11.17 16:01:01 LOG7[23729:139952118695680]: 2 client connects that finished2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 client renegotiations requested2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 server connects (SSL_accept())2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 server connects that finished2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 server renegotiations requested2013.11.17 16:01:01 LOG7[23729:139952118695680]: 1 session cache hits2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 external session cache hits2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 session cache misses2013.11.17 16:01:01 LOG7[23729:139952118695680]: 0 session cache timeouts2013.11.17 16:01:01 LOG6[23729:139952118695680]: SSL connected: previous session reused2013.11.17 16:01:02 LOG7[23729:139952118695680]: SSL socket closed on SSL_read2013.11.17 16:01:02 LOG7[23729:139952118695680]: Socket write shutdown2013.11.17 16:01:02 LOG5[23729:139952118695680]: Connection closed: 241 bytes sent to SSL, 825 bytes sent to socket2013.11.17 16:01:02 LOG7[23729:139952118695680]: gmail-smtp finished (0 left) Thanks a lot

1 0

Weird tunneling eMule's web interface
by Javier 17 Nov '13

17 Nov '13

Hi there, lets see: When I setup a server for the eMule's web interface and I access with the browser through https, the result is that the web interface never fully loads. When I setup a server for the web interface and a client connecting to that server and I access with the browser through http and with help of the client, the web interface loads without problems. Ok, at this point you think... "maybe the browser doesn't understand stunnel server at first instance for some reason... and needs the client to have a good SSL connection". So, we complicate things.... ;-) I made the following scenario because, sometimes, you can't use a client in the remote computer (where is not the web interface, if you are lost what with I'm telling). So, now we setup a server for the web interface, a client that connects to the server and a new server that connects to the client to serve to the remote browser... and... happens the same as the first example, as if it was only one server serving the web interface: it never fully loads. (I know, this scenario was quite weird :-P ). In case it was the browser I checked max connections, pipelining, etc, (allowing crazy max connection limits) but that didn't help on success :-( No matter of what web browser I use, they all do the same. They create between 7 to 15 connections with stunnel (sometimes more, others less) and nothing else. With the help of the client, all is smooth with over 150 connections. I tried too to create an html file "similar" to the web interface with the same resources (basically loads of images and therefore requests per second) and with my own web server and, in this case, there was no drama at all. The browsers connect to the stunnel server with over 190 connections in an eye blink and without of an stunnel client. At this point, I'm quite lost :-S Why doesn't load the web interface connecting directly to the stunnel server but does with the help of a client? Any ideas? Probably is the built-in web server of eMule, but it doesn't give problems when there is no stunnel in between or when using an stunnel client to connect to that stunnel server :S If you use eMule, test it and tell me if it works for you. Regards. P.S.: I hope you understood all because, even for me, has been confusing to explain.

1 0

stunnel server configuration requirement to handle CBC protection
by Simner, John 13 Nov '13

13 Nov '13

Hi, Having recently used stunnel on the phone as a server to encrypt the communication between an external client and a simple TCP server socket on the phone, one of the clients have raised the following.... Phone resets a TLS conection from client, when CBC protection is enabled on tomcat server. The phone syslog shows: Oct 28 14:26:14 10 user.crit syslog: CommsChannelExtenderRx(28881): ./src/CommsChannelExtenderRx.cpp:186 Header section invalid To prevent a SSL/TLS BEAST attack (CVE-2011-3389) Oracle Java (JSSE) has implemented a CBC protection which can be set with System Property jsse.enableCBCProtection. The default value is true. What was done: Start client and connect it with a phone. The TLS connection is established, but then the phone resets the connection, and client is not working. When I set jsse.enableCBCProtection to false at the tomcat server, the phone accepts the connection and client is working. To prevent man-in-the-middle attacks, the phone should be able to handle the fragmented TLS block when CBC protection is activated on the client tomcat server. I have been unable to find the appropriate stunnel configuration item to support this. Please could you inform me how this is handled through stunnel. Thank you for your assistance and I look forward to your responses. Thanks.. John John Simner BSc(Hons) MSc CEng. MIET Software Engineer Unify Enterprise Communications Ltd. Devices Development K Block, Technology Drive, Beeston, Nottingham, NG9 1LA Tel.: +44 (0) 19088 17378 Email: john.simner(a)unify.com <mailto:[email protected]> www.unify.co.uk<http://www.unify.co.uk/> Follow us: [Social_media_icons] <http://www.unify.com/social-media> Unify Enterprise Communications Limited. Registered Office: Brickhill Street, Willen Lake, Milton Keynes, MK15 0DJ Registered No: 5903714, England. This email contains confidential information and is for the exclusive use of the addressee. If you are not the addressee then any distribution, copying, or use of this email is prohibited. If received in error, please advise the sender and delete immediately. We accept no liability for any loss or damage suffered by any person arising from use of this email.

4 10

Patch for Start TLS for LDAP clients (RFC 2830)
by Bart Dopheide 07 Nov '13

07 Nov '13

Hi, I noticed that latest/greatest stunnel does not support the Start TLS operation for LDAP (RFC2830). Yet, I need it in my organisation as a quick workaround. After fiddling with OpenLDAP, tracing, and reading RFC 2830 a bit, I patched stunnel 4.56 and the patch has not failed me yet. But I must remark that I am no LDAP expert, nor an certified stunnel hacker. So, I will submit this patch as a first suggestion. Will you consider the feature request of implementing the Start TLS feature as described in RFC 2830? Cheers, Bart Dopheide My patch suggestion is: dopheideb@anguish:/tmp$ diff -aur stunnel-4.56 stunnel-4.56-ldap-starttls-patch diff -aur stunnel-4.56/src/protocol.c stunnel-4.56-ldap-starttls-patch/src/protocol.c --- stunnel-4.56/src/protocol.c 2013-03-13 14:41:16.000000000 +0100 +++ stunnel-4.56-ldap-starttls-patch/src/protocol.c 2013-11-05 11:19:10.388365359 +0100 @@ -53,6 +53,7 @@ static void imap_client(CLI *); static void imap_server(CLI *); static void nntp_client(CLI *); +static void openldap_client(CLI *); static void connect_server(CLI *); static void connect_client(CLI *); @@ -82,6 +83,7 @@ {"pop3", {{PROTOCOL_PRE_SSL, pop3_server}, {PROTOCOL_PRE_SSL, pop3_client}}}, {"imap", {{PROTOCOL_PRE_SSL, imap_server}, {PROTOCOL_PRE_SSL, imap_client}}}, {"nntp", {{PROTOCOL_NONE, NULL}, {PROTOCOL_PRE_SSL, nntp_client}}}, + {"openldap",{{PROTOCOL_NONE, NULL}, {PROTOCOL_PRE_SSL, openldap_client}}}, {"connect", {{PROTOCOL_PRE_CONNECT, connect_server}, {PROTOCOL_PRE_SSL, connect_client}}}, {NULL, {{PROTOCOL_NONE, NULL}, {PROTOCOL_NONE, NULL}}} }; @@ -513,6 +515,88 @@ str_free(line); } +/**************************************** LDAP, RFC 2830 */ + +u8 ldap_startssl_message[0x1d + 2] = +{ + 0x30, /* tag = UNIVERSAL SEQUENCE */ + 0x1d, /* len = 29 (the remaining number of bytes in this message) */ + 0x02, /* messageID */ + 0x01, /* len = 1 */ + 0x01, /* value = 1 (this is messageID 1) */ + /* --- */ + 0x77, /* protocolOp = APPLICATION (23) (=ExtendedRequest) + * 0b01xxxxxx => APPLICATION + * 0bxx1xxxxx => ? + * 0xxxx10111 => 23 + */ + 0x18, /* len = 24 */ + 0x80, /* type = requstName? */ + 0x16, /* len = 22 */ + /* OID: 1.3.6.1.4.1.1466.20037 (=LDAP_START_TLS_OID)*/ + '1', '.', + '3', '.', + '6', '.', + '1', '.', + '4', '.', + '1', '.', + '1', '4', '6', '6', '.', + '2', '0', '0', '3', '7' + /* No requestValue, as per RFC2830 (in 2.1: "The requestValue field is absent") */ +}; +static void openldap_client(CLI *c) { + u8 buffer[1]; + u8 ldap_response[256]; + + s_log(LOG_DEBUG, "Requesting LDAP Start TLS"); + write_blocking(c, c->remote_fd.fd, ldap_startssl_message, ldap_startssl_message[1] + 2); + + read_blocking(c, c->remote_fd.fd, buffer, 1); + if(buffer[0] != 0x30) { + s_log(LOG_ERR, "start tag is not UNIVERSAL SEQUENCE"); + longjmp(c->err, 1); + } + + s_log(LOG_DEBUG, "Reading LDAP message size (1 byte)."); + read_blocking(c, c->remote_fd.fd, buffer, 1); + + s_log(LOG_DEBUG, "Reading LDAP message (%u byte(s))", buffer[0]); + read_blocking(c, c->remote_fd.fd, ldap_response, buffer[0]); + + if(ldap_response[0] != 0x02) { + s_log(LOG_ERR, "LDAP response does not start with type messageID"); + longjmp(c->err, 1); + } + if(ldap_response[1] != 0x01) { + s_log(LOG_ERR, "This is not an extendedResp(1)"); + longjmp(c->err, 1); + } + if(ldap_response[2] != 0x01) { + s_log(LOG_ERR, "Non-matching messageID"); + longjmp(c->err, 1); + } + if(ldap_response[3] != 0x78) { + s_log(LOG_ERR, "This is not a protocolOp for APPLICATION ExtendedResponse"); + longjmp(c->err, 1); + } + if(ldap_response[4] != 0x07) { + s_log(LOG_ERR, "Expected 0x07 indicating extendedResp is 7 bytes long"); + longjmp(c->err, 1); + } + if(ldap_response[5] != 0x0a) { + s_log(LOG_ERR, "This is not an extendedResp"); + longjmp(c->err, 1); + } + if(ldap_response[6] != 0x01) { + s_log(LOG_ERR, "This is not an extendedResp"); + longjmp(c->err, 1); + } + if(ldap_response[7] != 0x00) { + s_log(LOG_ERR, "This is not resultCode success"); + longjmp(c->err, 1); + } +} + /**************************************** connect */ static void connect_server(CLI *c) { dopheideb@anguish:/tmp$

3 2

stunnel x forwarded not working
by Libindas 05 Nov '13

05 Nov '13

Hi all, We are facing problem with stunnel + HAproxy + Tomcat Client -----> Stunnel-----> HAProxy----> Tomcat { I need get client IP in Tomcat Servers} I have compiled(stunnel-4.32 + stunnel-4.32-xforwarded-for.diff) and installed but not working. Really appreciate your help Thanks Libin

2 1

Trouble sending email via smtp with a particular gmail address
by Brian Morgan 01 Nov '13

01 Nov '13

I'm having trouble sending email through stunnel with our customer service email address. We use google premium services for our hosted email. I can send through stunnel using my own personal account, but when I switch to the cust service account, I get the error: "Failed to send an E-mail through the specified SMTP server [127.0.0.1]: The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.5.1 Authentication Required." And yes, I double/triple checked credentials and can login through the gmail interface with them just fine. I also tried changing the password to a strong password which did not help. gmail settings in stunnel.conf: [gmail-smtp] client = yes accept = 127.0.0.1:259 connect = smtp.gmail.com:465 I also tried port 587 but that produces another error: "Failed to send an E-mail through the specified SMTP server [127.0.0.1]: Failure sending mail." Any ideas?

2 4

Clear LogWindow without Restart stunnel possible?
by Ben Stover 01 Nov '13

01 Nov '13

Can I somehow clear the current LogWindows WITHOUT exit+restarting stunnel?

2 1

Question Regarding Client Installer
by Andrew Smith 29 Oct '13

29 Oct '13

We currently use Stunnel to allow our clients to connect to their Databases that are hosted by us. I think this product is great. However, I am a newbie to Stunnel as our previous resource has passed away. What I would like to know now to do is create an installer for clients machines that have the correct configuration files in etc... I am sure this is pretty easy and I will be able to do it this once I am guided in the correct direction. Thanks in advance! ________________________________ Andrew Smith Support Technical Services Analyst P: 614-875-4910 x109 F: 614-875-4088 E: andrew.smith(a)harriscomputer.com [http://www.harriscomputer.com/images/signatures/HarrisSchools.jpg] [http://www.harriscomputer.com/images/signatures/DivisionofHarris.gif]<http://www.harriscomputer.com/> 6110 Enterprise Parkway Grove City, OH 43123 www.harris-schoolsolutions.com<http://www.harris-schoolsolutions.com> This message is intended exclusively for the individual or entity to which it is addressed. This communication may contain information that is proprietary, privileged or confidential or otherwise legally exempt from disclosure. If you are not the named addressee, you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If you have received this message in error, please notify the sender immediately by e-mail and delete all copies of the message.

2 1

Re: [stunnel-users] Is it usual/recommended to have key and cert in ONE stunnel.pem file?
by Ben Stover 29 Oct '13

29 Oct '13

Hello John, thank you for your clarification. Two more additional questions: According to stunnel guide I created a cert + key with the following command: openssl.exe req -new -x509 -days 3650 -nodes -config stunnel.cnf -out stunnelcert.pem -keyout stunnelkey.pem 1.) For what do I need here the -config stunnel.cnf parameter? I am prompted by openssl for the content values during generation anyway. Can stunnel.cnf be seen only as a default value pattern for the created cert during generation? Can I omit this parameter? 2.) After creation of cert+key I have to specify them (as client) in stunnel.conf (with "o") as follows: cert = stunnelcert.pem key = stunnelkey.pem Is this sufficient? Thank you Ben On Mon, Oct 28, 2013 at 06:39:15PM +0100, Ben Stover wrote: > According to some tutorial pages I generated with OpenSSL a (selfsigned) certificate. > > This file stunnel.pem contains the certifictae as well as the private key. > > Is this usual/recommended? Hello John, That sort of falls into the "tragedy waiting to happen" category. The certificate is supposed to be given to clients, and the key belongs to the server and has to be kept private or there's really no point in using SSL. > Or should user put these two parts in two independent files? Yes, absolutely. In fact I suppose you're using Windows or went through some hoop-jumping to combine them, because in "normal" OpenSSL usage the key is generated first and then the certs are requested and signed by the CA (or selfsigning) key. /jl

2 1

VPAT Section 508 Compliance
by Tracy Drake - QI-C 28 Oct '13

28 Oct '13

Hello Stunnel Support! I am seeking a VPAT showing the level Sec 508 compliance so that we can move toward making Stunnel a GSA-approved software. I guess the biggest question is whether or not Stunnel is considered to be section 508 compliant. Please advise as to where/how I can obtain this information. -- Tracy Drake CSM Senior Consultant GSA-FAS FAME Contractor URSA & INFOConnect Support & Training Team Lead 704-987-1211 tracy.drake(a)gsa.gov

1 0

Is it usual/recommended to have key and cert in ONE stunnel.pem file?
by Ben Stover 28 Oct '13

28 Oct '13

According to some tutorial pages I generated with OpenSSL a (selfsigned) certificate. This file stunnel.pem contains the certifictae as well as the private key. Is this usual/recommended? Or should user put these two parts in two independent files? Ben

2 1

Is "fips=no" recommended?
by Ben Stover 25 Oct '13

25 Oct '13

I stunnel.conf there is a parameter fips=no which is currently commented out here. Is it (resp. when is it) recommended to activate this parameter? Ben

2 1

Verify = 4 Fails Yet Again
by Thomas Eifert 25 Oct '13

25 Oct '13

I've just encountered another situation in which verify = 4 fails on a seemingly valid certificate. Since I've previously posted details regarding this issue, I'm only going to post the certificate here. This is the 3rd certificate I've run across in the past 6 months that fails to verify. Can all 3 of the certificates be faulty, or is there an issue with Stunnel or OpenSSL here? Thomas -----BEGIN CERTIFICATE----- MIIGyTCCBbGgAwIBAgIQC0NHQrtbGPWbZINtfJec1jANBgkqhkiG9w0BAQUFADBm MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3 d3cuZGlnaWNlcnQuY29tMSUwIwYDVQQDExxEaWdpQ2VydCBIaWdoIEFzc3VyYW5j ZSBDQS0zMB4XDTEzMDYwMzAwMDAwMFoXDTE2MDgxMDEyMDAwMFowgYQxCzAJBgNV BAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRIwEAYDVQQHEwlFc2NvbmRpZG8x JjAkBgNVBAoTHUZvcnRlIEludGVybmV0IFNvZnR3YXJlLCBJbmMuMQswCQYDVQQL EwJJVDEXMBUGA1UEAwwOKi5mb3J0ZWluYy5jb20wggEiMA0GCSqGSIb3DQEBAQUA A4IBDwAwggEKAoIBAQDZ8XZFzc6kdJt8WMByc4VPw7Ru4JZ6P+AyZXcLNA/hSih0 Xes5fGjw7oBTyUJWic/FIe397AKkjM8WGtH70EnOv3BzAHzv5ftdhG6UskJmZV7K pokKao+M6AtL0yLyXTDXXF0c7dcUwmQ9lu2LIvyqMCo5RNjaNHPoG+pqxXSN4mSj kSxUsW62p6+qE+uJGBP9HW14DGzE+OBUfB/noC63qMWjYIOWmRX/rIC8H6NyFBWl K0X0yUkxbkc5o/f9DiChCCvzK7RUIiZfDxBKKQ4VZq8+cIHIhHzbziDj2J7Twj2b VeL052E7EjTxRvYIEkyaU2JIbvcLKDzJ1H5vHxpTAgMBAAGjggNSMIIDTjAfBgNV HSMEGDAWgBRQ6nOJ2yn7EI+e5QEg1N55mUiD9zAdBgNVHQ4EFgQUwgLEas/pP7rM UfpMXPrkHEg4SWcwJwYDVR0RBCAwHoIOKi5mb3J0ZWluYy5jb22CDGZvcnRlaW5j LmNvbTAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUF BwMCMGEGA1UdHwRaMFgwKqAooCaGJGh0dHA6Ly9jcmwzLmRpZ2ljZXJ0LmNvbS9j YTMtZzIyLmNybDAqoCigJoYkaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL2NhMy1n MjIuY3JsMIIBxAYDVR0gBIIBuzCCAbcwggGzBglghkgBhv1sAQEwggGkMDoGCCsG AQUFBwIBFi5odHRwOi8vd3d3LmRpZ2ljZXJ0LmNvbS9zc2wtY3BzLXJlcG9zaXRv cnkuaHRtMIIBZAYIKwYBBQUHAgIwggFWHoIBUgBBAG4AeQAgAHUAcwBlACAAbwBm ACAAdABoAGkAcwAgAEMAZQByAHQAaQBmAGkAYwBhAHQAZQAgAGMAbwBuAHMAdABp AHQAdQB0AGUAcwAgAGEAYwBjAGUAcAB0AGEAbgBjAGUAIABvAGYAIAB0AGgAZQAg AEQAaQBnAGkAQwBlAHIAdAAgAEMAUAAvAEMAUABTACAAYQBuAGQAIAB0AGgAZQAg AFIAZQBsAHkAaQBuAGcAIABQAGEAcgB0AHkAIABBAGcAcgBlAGUAbQBlAG4AdAAg AHcAaABpAGMAaAAgAGwAaQBtAGkAdAAgAGwAaQBhAGIAaQBsAGkAdAB5ACAAYQBu AGQAIABhAHIAZQAgAGkAbgBjAG8AcgBwAG8AcgBhAHQAZQBkACAAaABlAHIAZQBp AG4AIABiAHkAIAByAGUAZgBlAHIAZQBuAGMAZQAuMHsGCCsGAQUFBwEBBG8wbTAk BggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGlnaWNlcnQuY29tMEUGCCsGAQUFBzAC hjlodHRwOi8vY2FjZXJ0cy5kaWdpY2VydC5jb20vRGlnaUNlcnRIaWdoQXNzdXJh bmNlQ0EtMy5jcnQwDAYDVR0TAQH/BAIwADANBgkqhkiG9w0BAQUFAAOCAQEAfaQd sAZueUdpTa/3TBpGPlKRiirlATk4kLgpk08R73hEsbA3LICRA5RbfvBGZ56031Hh rxzU8ZhI8q4kKiLbYawpRw9bzxlX35GW5MwuZiQTY0eL45V2L17Ya+Qi1+zYSAvA ZrkC2IGXUuV+sup+WQ8nx+A+HE0aGBWwCoza8qbrbFc86DrPKaGBqyanSSNQBDOg Jzojg6do31qnrDOc/Sg9fckSOtBTFO3Dqgyv0UiaaimcQE3OOqEeianQ7REE2XIX 96d2iRp5fVxMjx9SCfaD31DIogTbYmrw7+3KEPgU8QNn1RAzjPUkSZxvcO8X/Xue vw2kqH9uZ7dlx7c6CA== -----END CERTIFICATE----- -- Attention: This message and all attachments are private and may contain information that is confidential and privileged. If you received this message in error, please notify the sender by reply email and delete the message immediately.

2 10

Transparent Proxy Source on HPUX 11i
by Jeremy Brock 24 Oct '13

24 Oct '13

Hi All, Are there any plans to make Transparent Mode possible on HPUX? 2013.10.22 16:24:22 LOG5[3607:1]: stunnel 4.56 on ia64-hp-hpux11.23 platform 2013.10.22 16:24:22 LOG5[3607:1]: Compiled/running with OpenSSL 0.9.8y 5 Feb 2013 2013.10.22 16:24:22 LOG5[3607:1]: Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP 2013.10.22 16:24:22 LOG5[3607:1]: Reading configuration from file /ASKPLUS/stunnel/stunnel.conf 2013.10.22 16:24:22 LOG5[3607:1]: Configuration successful 2013.10.22 16:24:47 LOG5[3608:2]: Service [ vsrvtcp ] accepted connection from 192.168.15.6:1169 *2013.10.22 16:24:47 LOG3[3608:2]: Transparent proxy in remote mode is not supported on this platform* 2013.10.22 16:24:47 LOG5[3608:2]: Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket ~Jeremy -- Jeremy Brock Vital Soft, Inc www.vital-soft.com

2 1

Stunnel Service as other user
by Florian Götz 24 Oct '13

24 Oct '13

Hi Stunnel users, if I use xinetd to start a service I got the possibility to start the service with a dedicated user. For example: service fex { socket_type = stream wait = no type = unlisted protocol = tcp bind = 123.12.1.12 port = 80 cps = 10 2 * user = fex groups = yes server = /home/fex/bin/fexsrv nice = 0 disable = no } I got some kind of webserver (not apache, nginx etc) that needs to be started with xinetd (the example above). This server should get a SSL tunnel. If I use Stunnel in daemon mode (without jails/chroot) and define a service like this: [https] accept = 123.12.1.12:443 exec = /home/fex/bin/fexsrv execargs = fexsrv stunnel TIMEOUTclose = 2 Everything works fine, except that the server now runs as root. Is there a possibility to set a user for a service? Best regards Florian Götz -- Mit freundlichen Grüßen Florian Götz ----------------------------------------------------------------- Dipl.-Inf. (FH) Florian Götz Rechenzentrum Hochschule Mannheim Paul-Wittsack-Straße 10 68163 Mannheim Tel: 0621/292-6232 EMail: f.goetz(a)hs-mannheim.de Internet: http://www.rz.hs-mannheim.de -----

2 1

Username and Password in Clear Text
by Peter K. O'Connor 24 Oct '13

24 Oct '13

Hi, I am using stunnel 4.56 Windows verison. I thought the username and password will *only* be sent to SERVER2, *after* the SSL handshake, with each request. However, the truth is that the Proxy-Authorization header is attached to the request to SERVER1 "CONNECT SERVER2:433 HTTP/1.1", as well. So SERVER1 can see username and password. It is not necessary and safe. Am I missing anything here? Regards, Peter [stunnel] client = yes accept = 127.0.0.1:8080 connect = SERVER1:3128 protocol = connect protocolHost = SERVER2:443 protocolUsername = username protocolPassword = password

2 1

Re: [stunnel-users] Which X.509 certificate types (.crt, .pem, .der .p7c) possible for stunnel and how to import them?
by Ben Stover 24 Oct '13

24 Oct '13

Assume I have already an *.pem cert (for SMTP over STARTTLS transfer). Where (in whcih directory) should I put this cert file? Ben On Fri, 18 Oct 2013 12:35:25 +0000, Eckert, Doug wrote: >You can use OpenSSL to convert between formats (to .pem for STunnel) >https://support.ssl.com/Knowledgebase/Article/View/19/0/der-vs-crt-vs-cer-v… >You can also use openssl to strip the key's passphrase. This is handy for automatic starting (init/cron/at) of STunnel without having it prompt for the passphrase. > $ openssl rsa -in source.pem -out target.pem >-----Original Message----- >From: stunnel-users [mailto:[email protected]] On Behalf Of Ben Stover >Sent: Friday, October 18, 2013 3:21 AM >To: Stunnel Users >Subject: [stunnel-users] Which X.509 certificate types (.crt, .pem, .der .p7c) possible for stunnel and how to import them? >Which X.509 certificate types (e.g. .crt, .pem, .der .p7c) are possible for stunnel? >Assume I have got such a certificate as separate file (and not retrieved by OpenSSL). >How do I import it into stunnel? >Do I have to just copy it into (which ?) directory? >Does the certifcate file name have to have a certain pattern? >Or is stunnel smart enough to read and analyze the content independently from filename? >Thank you >Ben >_______________________________________________ >stunnel-users mailing list >stunnel-users(a)stunnel.org >https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

1 0

Which X.509 certificate types (.crt, .pem, .der .p7c) possible for stunnel and how to import them?
by Ben Stover 18 Oct '13

18 Oct '13

Which X.509 certificate types (e.g. .crt, .pem, .der .p7c) are possible for stunnel? Assume I have got such a certificate as separate file (and not retrieved by OpenSSL). How do I import it into stunnel? Do I have to just copy it into (which ?) directory? Does the certifcate file name have to have a certain pattern? Or is stunnel smart enough to read and analyze the content independently from filename? Thank you Ben

2 1

How to setup most detailed error log (for one service?
by Ben Stover 17 Oct '13

17 Oct '13

currently I have specified in *.conf file debug = 7 Is this the most detailed log output possible? I miss somehow the transfer protocol lines (what is sent and what received) How do I get this? Is it possible to setup debug = 3 as global variable and to define debug = 7 for just ONE particular service? Ben

2 1

stunnel server communicating external client IP addresses through to a TCP server for logging purposes
by Simner, John 17 Oct '13

17 Oct '13

Hi, We have recently used stunnel on the phone as a server to encrypt the communication between an external client and a TCP server on the phone. There is a requirement for the phone to log every external client access. Is there any way for stunnel to include the IP address of the external client when setting up an new TCP connection to the local TCP server? Thank you for your assistance and I look forward to your responses. Thanks.. John John Simner BSc(Hons) MSc CEng. MIET Software Engineer Unify Enterprise Communications Ltd. Devices Development K Block, Technology Drive, Beeston, Nottingham, NG9 1LA Tel.: +44 (0) 19088 17378 Email: john.simner(a)unify.com <mailto:[email protected]> www.unify.co.uk<http://www.unify.co.uk/> Follow us: [Social_media_icons] <http://www.unify.com/social-media> Unify Enterprise Communications Limited. Registered Office: Brickhill Street, Willen Lake, Milton Keynes, MK15 0DJ Registered No: 5903714, England. This email contains confidential information and is for the exclusive use of the addressee. If you are not the addressee then any distribution, copying, or use of this email is prohibited. If received in error, please advise the sender and delete immediately. We accept no liability for any loss or damage suffered by any person arising from use of this email.

2 1

How to get the remote mail server certificate before/at first connect?
by Ben Stover 17 Oct '13

17 Oct '13

When I connect from my local mail client (e.g. Thunderbird) the first time (!) with a remote mail server through STARTTLS for a SMTP session then at first a server certificate is delivered. On the Thunderbird email client side a popup appears which prompts me to confirm the remote server certificate. Only AFTER this confirmation I am able to send email through this STARTTLS SMTP connection. Ok. Now lets switch to another scenario where a non-default email client (=NOT Thunderbird) want to send emails through stunnel to the remote mail server. Everything is setup in stunnel.conf and propriatary email client. But how do I get the remote server certificate (for stunnel)? Is there an option in stunnel.conf to receive and auto-accept the delivered server certificate at first? Where is it stored? Can I extract certificate from Thunderbird and import it to stunnel? Ben

2 1

Re: [stunnel-users] EXTERNAL: How to setup stunnel für SMTP over STARTTL S (and not pure SSL)?
by Bucci, David G 16 Oct '13

16 Oct '13

The protocol directive determines what Stunnel does during the connection setup. "protocol = smtp" tells Stunnel to use STARTTLS semantics for the connection to the server, as described in RFC2487 (similarly to how "protocol = imap" tells it to use STARTTLS for IMAP, per RFC 2595). -----Original Message----- From: Ben Stover [mailto:[email protected]] Sent: Wednesday, October 16, 2013 11:08 AM To: Stunnel Users Cc: Bucci, David G Subject: RE: EXTERNAL: How to setup stunnel für SMTP over STARTTL S (and not pure SSL)? Sorry, I went to the webpage with the link you mentioned. There I searched for STARTTLS but NO (!) occurence was found. What does protocol (here = smtp) to do with the security handshare type (here = STARTTLS). On Wed, 16 Oct 2013 13:10:29 +0000, Bucci, David G wrote: >Oh, meant to add - look at the "protocol" option, documented here: http://www.stunnel.org/static/stunnel.html >-----Original Message----- >From: Bucci, David G >Sent: Wednesday, October 16, 2013 8:54 AM >To: 'Ben Stover'; Stunnel Users >Subject: RE: EXTERNAL: How to setup stunnel für SMTP over STARTTLS (and not pure SSL)? >https://www.stunnel.org/pipermail/stunnel-users/2011-April/003060.html >Yes, it's supported. (you'll get a cert error on that connect, ironically) >-----Original Message----- >From: stunnel-users [mailto:[email protected]] On Behalf Of Ben Stover >Sent: Wednesday, October 16, 2013 5:56 AM >To: Stunnel Users >Subject: EXTERNAL: How to setup stunnel für SMTP over STARTTLS (and not pure SSL)? >Assume my mailbox provider offers only SMTP delivery over STARTTLS (and not pure SSL). >How do I have configure stunnel to cope with this protocol? >Lets say the remote smtp server would be >smtp.foobar.com:587 >How would a service section in conf file look like? >Thank you >Ben >_______________________________________________ >stunnel-users mailing list >stunnel-users(a)stunnel.org >https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

1 0

Re: [stunnel-users] EXTERNAL: How to setup stunnel für SMTP over STARTTL S (and not pure SSL)?
by Michal Trojnara 16 Oct '13

16 Oct '13

On 10/16/2013 05:07 PM, Ben Stover wrote: > Sorry, I went to the webpage with the link you mentioned. > There I searched for STARTTLS but NO (!) occurence was found. This is because STARTTLS is not a separate protocol, but rather an option (usually an extension) of various protocols that can negotiate SSL/TLS encryption. http://en.wikipedia.org/wiki/STARTTLS Mike

2 1

Re: [stunnel-users] EXTERNAL: How to setup stunnel für SMTP over STARTTLS (and not pure SSL)?
by Bucci, David G 16 Oct '13

16 Oct '13

https://www.stunnel.org/pipermail/stunnel-users/2011-April/003060.html Yes, it's supported. (you'll get a cert error on that connect, ironically) -----Original Message----- From: stunnel-users [mailto:[email protected]] On Behalf Of Ben Stover Sent: Wednesday, October 16, 2013 5:56 AM To: Stunnel Users Subject: EXTERNAL: How to setup stunnel für SMTP over STARTTLS (and not pure SSL)? Assume my mailbox provider offers only SMTP delivery over STARTTLS (and not pure SSL). How do I have configure stunnel to cope with this protocol? Lets say the remote smtp server would be smtp.foobar.com:587 How would a service section in conf file look like? Thank you Ben _______________________________________________ stunnel-users mailing list stunnel-users(a)stunnel.org https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

1 1

Disable support for insecure SSLv2 protocol but allow for ONE service
by Ben Stover 16 Oct '13

16 Oct '13

When I try to connect to one of my mailboxes I get a return: SSL_connect: 1408F10B: error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number Connection reset: 0 byte(s) sent to SSL, 0 byte(s) sent to socket What does that mean? in stunnel.conf I set the global parameter: options = NO_SSLv2 This works in general. But for the mentioned email provider it could mean that he allows only SSLv2. Is this the reason? Where is described what is inscure at SSLv2? How can I allow for that particular email provider SSLv2 but disallow for all others? Ben

4 3

Writing "hello" to log window when entering a certain service section?
by Ben Stover 15 Oct '13

15 Oct '13

Assume an (unknown) client on my computer connects through stunnel to a remote server. As soon as this local client connects local stunnel the stunnel should write a user specified string line to the log window (if possible in bold letters). Can I define this with a syntax similar to: [gmail-pop3] client = yes output = "hello outgoing alert gmail port 1109" accept = 127.0.0.1:1109 connect = pop.gmail.com:995 Thank you Peter

2 1

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