- stunnel-users - stunnel.org

Proxy for content filtering
by Raj 29 Jul '10

29 Jul '10

Hi All I want to build a proxy server, which acts as man in the middle proxy. The main intention of application is to do content filtering, whether it is an http or https request. I want to block some specified URL. Can anybody tell me what is the best approach of doing this Thanks, Raj Rajmohan SK

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Re: [stunnel-users] stunnel-users Digest, Vol 72, Issue 2
by TONY WESTENHOFER 07 Jul '10

07 Jul '10

stunnel-users-request(a)mirt.net wrote: >Send stunnel-users mailing list submissions to > stunnel-users(a)mirt.net > >To subscribe or unsubscribe via the World Wide Web, visit > http://stunnel.mirt.net/mailman/listinfo/stunnel-users >or, via email, send a message with subject or body 'help' to > stunnel-users-request(a)mirt.net > >You can reach the person managing the list at > stunnel-users-owner(a)mirt.net > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of stunnel-users digest..." > > >Today's Topics: > > 1. Re: telnetd and tcp_wrappers (Spence, Thomas Civ 844 CS/SCOX) > 2. change openssl version with configure (Bhavna Jhunjhunwala) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Tue, 6 Jul 2010 08:28:11 -0400 >From: "Spence, Thomas Civ 844 CS/SCOX" <Thomas.Spence(a)pentagon.af.mil> >Subject: Re: [stunnel-users] telnetd and tcp_wrappers >To: "stunnel-users(a)mirt.net" <stunnel-users(a)mirt.net> >Message-ID: > <751B1F405F4AFF4D907BD567538A83FB04FFE0B6DA(a)tequilasunrise.pentagon.ncr.ds.af.mil> > >Content-Type: text/plain; charset="us-ascii" > >2 guys did help me and still no luck... > >Anyone who tried this: > >[tssl] >accept = 992 >exec = /usr/sbin/telnetd > >Let me know... Reason why I am asking you because when I log off the server then stunnel's process stopped running but I want it keep running after logoff. Before I changed 'exec = /usr/sbin/telnetd', it was 'connect = 23' and the stunnel's process ran great and never stop running... Strange. > >I really need your help. Thanks. > >--------------- >Tom Spence >ABIDES SYSTEM SUPPORT >844th CS/SCOX > > > >------------------------------ > >Message: 2 >Date: Tue, 6 Jul 2010 17:41:42 -0400 >From: Bhavna Jhunjhunwala <bhavnaj(a)quantitativebrokers.com> >Subject: [stunnel-users] change openssl version with configure >To: stunnel-users(a)mirt.net >Message-ID: > <AANLkTikGWuO2XbF8-rtOTMyfeHVdeUV8TZGJvmYfKekB(a)mail.gmail.com> >Content-Type: text/plain; charset="iso-8859-1" > >Hi, > >I have stunnel version as below installed on Mac: > >s*tunnel 4.33 on i386-apple-darwin10.2.0 with OpenSSL 0.9.8k 25 Mar 2009* >*Threading:PTHREAD SSL:ENGINE Sockets:SELECT,IPv6 Auth:LIBWRAP* >* * >*Global options* >*debug = daemon.notice* >*pid = /usr/local/var/run/stunnel/stunnel.pid* >*RNDbytes = 64* >*RNDfile = /dev/urandom* >*RNDoverwrite = yes* >* * >*Service-level options* >*cert = /usr/local/etc/stunnel/stunnel.pem* >*ciphers = ALL:!aNULL:!eNULL:!SSLv2* >*session = 300 seconds* >*stack = 65536 bytes* >*sslVersion = SSLv3 for client, all for server* >*TIMEOUTbusy = 300 seconds* >*TIMEOUTclose = 60 seconds* >*TIMEOUTconnect = 10 seconds* >*TIMEOUTidle = 43200 seconds* >*verify = none* > >I would like to upgrade the openssl version to 1.0.0a, so I do >./configure --with-ssl=dir >make >make install > >After make install i get below error: > >*make install* >*Making install in src* >*test -z "/usr/local/bin" || ../auto/install-sh -c -d "/usr/local/bin"* >* /bin/sh ../libtool --mode=install /usr/bin/install -c 'stunnel' >'/usr/local/bin/stunnel'* >*/usr/bin/install -c stunnel /usr/local/bin/stunnel* >*test -z "/usr/local/bin" || ../auto/install-sh -c -d "/usr/local/bin"* >* /usr/bin/install -c 'stunnel3' '/usr/local/bin/stunnel3'* >*test -z "/usr/local/lib/stunnel" || ../auto/install-sh -c -d >"/usr/local/lib/stunnel"* >* /bin/sh ../libtool --mode=install /usr/bin/install -c 'libstunnel.la' >'/usr/local/lib/stunnel/libstunnel.la'* >*/usr/bin/install -c .libs/libstunnel.dylib >/usr/local/lib/stunnel/libstunnel.dylib* >*/usr/bin/install -c .libs/libstunnel.lai /usr/local/lib/stunnel/ >libstunnel.la* >*----------------------------------------------------------------------* >*Libraries have been installed in:* >* /usr/local/lib/stunnel* >* >* >*If you ever happen to want to link against installed libraries* >*in a given directory, LIBDIR, you must either use libtool, and* >*specify the full pathname of the library, or use the `-LLIBDIR'* >*flag during linking and do at least one of the following:* >* - add LIBDIR to the `DYLD_LIBRARY_PATH' environment variable* >* during execution* >* >* >*See any operating system documentation about shared libraries for* >*more information, such as the ld(1) and ld.so(8) manual pages.* >*----------------------------------------------------------------------* >*make[2]: Nothing to be done for `install-data-am'.* >*Making install in doc* >*make[2]: Nothing to be done for `install-exec-am'.* >*test -z "/usr/local/share/doc/stunnel" || ../auto/install-sh -c -d >"/usr/local/share/doc/stunnel"* >* /usr/bin/install -c -m 644 'stunnel.html' >'/usr/local/share/doc/stunnel/stunnel.html'* >* /usr/bin/install -c -m 644 'stunnel.pl.html' >'/usr/local/share/doc/stunnel/stunnel.pl.html'* >* /usr/bin/install -c -m 644 'stunnel.fr.html' >'/usr/local/share/doc/stunnel/stunnel.fr.html'* >*test -z "/usr/local/share/man/man8" || ../auto/install-sh -c -d >"/usr/local/share/man/man8"* >*mkdir: /usr/local/share/man/man8: Permission denied* >*make[2]: *** [install-man8] Error 1* >*make[1]: *** [install-am] Error 2* > > > >and when I check the stunnel version it still uses the old ssl version. >Am I doing something wrong here? > >-- >Thanks, >Bhavna >Quantitative Brokers >646 293 1808 > > >DISCLAIMER: >This e-mail and any attachments are for the confidential use of the >intended recipient. If you are not the intended recipient of this >message you are hereby notified that any review, dissemination, >distribution or copying of this message is strictly prohibited. This >communication is for information purposes only and should not be >regarded as an offer to sell or as a solicitation of an offer to buy >any investment product, an official confirmation of any transaction >or an official statement of Quantitative Brokers, LLC. > >E-mail transmissions cannot be guaranteed to be secure or error-free. >Therefore, we do not represent that this information is complete or >accurate and it should not be relied upon as such. > >All information is subject to change without notice. >Quantitative Brokers may, at its discretion, monitor and review the >content of all e-mail communications. >

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problem with "verify=0"
by wujot＠home.pl 07 Jul '10

07 Jul '10

Hello everybody, The basic SSL negotiation requires the exchange of nine SSL messages. If client authentication is required, server can send additional message "certificate request". But this message is optional. I'm using stunnel ver. 4.27 for Win and 4.28 for Linux. In both cases stunnel, working as server, is sending "certificate request" message to the client, regardless of "verify" state, even with "verify=0". When "verify=0", server doesn't care about client's certificate. So, what for server sends this message? The part of my configuration and log is bellow: [test] accept = 60000 connect = 192.168.3.15:4679 client = no ;verify = 0 verify = none ciphers=DES-CBC3-SHA session = 3600 2010.07.07 12:53:35 LOG7[2412:4280]: SSL state (accept): before/accept initialization 2010.07.07 12:53:35 LOG7[2412:4280]: SSL state (accept): SSLv3 read client hello A 2010.07.07 12:53:35 LOG7[2412:4280]: SSL state (accept): SSLv3 write server hello A 2010.07.07 12:53:35 LOG7[2412:4280]: SSL state (accept): SSLv3 write certificate A 2010.07.07 12:53:35 LOG7[2412:4280]: SSL state (accept): SSLv3 write certificate request A <-------------???!!! 2010.07.07 12:53:35 LOG7[2412:4280]: SSL state (accept): SSLv3 flush data 2010.07.07 12:53:42 LOG6[2412:4280]: VERIFY IGNORE: depth=1, /C= .............. 2010.07.07 12:53:42 LOG5[2412:4280]: CRL: verification passed 2010.07.07 12:53:42 LOG5[2412:4280]: VERIFY OK: depth=1, /C= .......... 2010.07.07 12:53:42 LOG6[2412:4280]: VERIFY IGNORE: depth=0, /C= ................ 2010.07.07 12:53:42 LOG5[2412:4280]: CRL: verification passed 2010.07.07 12:53:42 LOG5[2412:4280]: VERIFY OK: depth=0, /C= .......................... 2010.07.07 12:53:42 LOG7[2412:4280]: SSL state (accept): SSLv3 read client certificate A 2010.07.07 12:53:42 LOG7[2412:4280]: SSL state (accept): SSLv3 read client key exchange a 2010.07.07 12:53:42 LOG7[2412:4280]: SSL state (accept): SSLv3 read certificate verify A 2010.07.07 12:53:42 LOG7[2412:4280]: SSL state (accept): SSLv3 read finished A 2010.07.07 12:53:42 LOG7[2412:4280]: SSL state (accept): SSLv3 write change cipher spec A 2010.07.07 12:53:42 LOG7[2412:4280]: SSL state (accept): SSLv3 write finished A So, my question is: how to remove "certificate request" message from stunnel-as-server negotiation? Regards, Wojtek

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change openssl version with configure
by Bhavna Jhunjhunwala 06 Jul '10

06 Jul '10

Hi, I have stunnel version as below installed on Mac: s*tunnel 4.33 on i386-apple-darwin10.2.0 with OpenSSL 0.9.8k 25 Mar 2009* *Threading:PTHREAD SSL:ENGINE Sockets:SELECT,IPv6 Auth:LIBWRAP* * * *Global options* *debug = daemon.notice* *pid = /usr/local/var/run/stunnel/stunnel.pid* *RNDbytes = 64* *RNDfile = /dev/urandom* *RNDoverwrite = yes* * * *Service-level options* *cert = /usr/local/etc/stunnel/stunnel.pem* *ciphers = ALL:!aNULL:!eNULL:!SSLv2* *session = 300 seconds* *stack = 65536 bytes* *sslVersion = SSLv3 for client, all for server* *TIMEOUTbusy = 300 seconds* *TIMEOUTclose = 60 seconds* *TIMEOUTconnect = 10 seconds* *TIMEOUTidle = 43200 seconds* *verify = none* I would like to upgrade the openssl version to 1.0.0a, so I do ./configure --with-ssl=dir make make install After make install i get below error: *make install* *Making install in src* *test -z "/usr/local/bin" || ../auto/install-sh -c -d "/usr/local/bin"* * /bin/sh ../libtool --mode=install /usr/bin/install -c 'stunnel' '/usr/local/bin/stunnel'* */usr/bin/install -c stunnel /usr/local/bin/stunnel* *test -z "/usr/local/bin" || ../auto/install-sh -c -d "/usr/local/bin"* * /usr/bin/install -c 'stunnel3' '/usr/local/bin/stunnel3'* *test -z "/usr/local/lib/stunnel" || ../auto/install-sh -c -d "/usr/local/lib/stunnel"* * /bin/sh ../libtool --mode=install /usr/bin/install -c 'libstunnel.la' '/usr/local/lib/stunnel/libstunnel.la'* */usr/bin/install -c .libs/libstunnel.dylib /usr/local/lib/stunnel/libstunnel.dylib* */usr/bin/install -c .libs/libstunnel.lai /usr/local/lib/stunnel/ libstunnel.la* *----------------------------------------------------------------------* *Libraries have been installed in:* * /usr/local/lib/stunnel* * * *If you ever happen to want to link against installed libraries* *in a given directory, LIBDIR, you must either use libtool, and* *specify the full pathname of the library, or use the `-LLIBDIR'* *flag during linking and do at least one of the following:* * - add LIBDIR to the `DYLD_LIBRARY_PATH' environment variable* * during execution* * * *See any operating system documentation about shared libraries for* *more information, such as the ld(1) and ld.so(8) manual pages.* *----------------------------------------------------------------------* *make[2]: Nothing to be done for `install-data-am'.* *Making install in doc* *make[2]: Nothing to be done for `install-exec-am'.* *test -z "/usr/local/share/doc/stunnel" || ../auto/install-sh -c -d "/usr/local/share/doc/stunnel"* * /usr/bin/install -c -m 644 'stunnel.html' '/usr/local/share/doc/stunnel/stunnel.html'* * /usr/bin/install -c -m 644 'stunnel.pl.html' '/usr/local/share/doc/stunnel/stunnel.pl.html'* * /usr/bin/install -c -m 644 'stunnel.fr.html' '/usr/local/share/doc/stunnel/stunnel.fr.html'* *test -z "/usr/local/share/man/man8" || ../auto/install-sh -c -d "/usr/local/share/man/man8"* *mkdir: /usr/local/share/man/man8: Permission denied* *make[2]: *** [install-man8] Error 1* *make[1]: *** [install-am] Error 2* and when I check the stunnel version it still uses the old ssl version. Am I doing something wrong here? -- Thanks, Bhavna Quantitative Brokers 646 293 1808 DISCLAIMER: This e-mail and any attachments are for the confidential use of the intended recipient. If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited. This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any investment product, an official confirmation of any transaction or an official statement of Quantitative Brokers, LLC. E-mail transmissions cannot be guaranteed to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice. Quantitative Brokers may, at its discretion, monitor and review the content of all e-mail communications.

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Re: [stunnel-users] telnetd and tcp_wrappers
by Spence, Thomas Civ 844 CS/SCOX 06 Jul '10

06 Jul '10

2 guys did help me and still no luck... Anyone who tried this: [tssl] accept = 992 exec = /usr/sbin/telnetd Let me know... Reason why I am asking you because when I log off the server then stunnel's process stopped running but I want it keep running after logoff. Before I changed 'exec = /usr/sbin/telnetd', it was 'connect = 23' and the stunnel's process ran great and never stop running... Strange. I really need your help. Thanks. --------------- Tom Spence ABIDES SYSTEM SUPPORT 844th CS/SCOX

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Re: [stunnel-users] telnetd and tcp_wrappers
by Spence, Thomas Civ 844 CS/SCOX 02 Jul '10

02 Jul '10

Hi Again, I tried: [tssl] accept = 992 exec = /usr/sbin/telnetd It works. When I log into the server with no problem. When I am ready to log off then the process stopped running??? How can it stays running in process (/usr/local/bin/stunnel)? Thanks. Tom -----Original Message----- From: Spence, Thomas Civ 844 CS/SCOX Sent: Thursday, July 01, 2010 11:53 AM To: 'stunnel-users(a)mirt.net' Subject: telnetd and tcp_wrappers Hi all.. They requested us to turn off the telnetd from inetd.conf and not allowing to use tcp_wrappers... We are still using stunnel 4.33... We can't connect our server from PC with PowerTerm WebConnect because telnetd is off. Is there any way for all users to connect the server by using PowerTerm WebConnect? stunnel.conf: [tssl] accept = 992 connect = 23 (can't use telnet port) I know I can't use "connect = 22" because it doesn't work. Any idea? I really need your help... --------------- Tom Spence

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telnetd and tcp_wrappers
by Spence, Thomas Civ 844 CS/SCOX 01 Jul '10

01 Jul '10

Hi all.. They requested us to turn off the telnetd from inetd.conf and not allowing to use tcp_wrappers... We are still using stunnel 4.33... We can't connect our server from PC with PowerTerm WebConnect because telnetd is off. Is there any way for all users to connect the server by using PowerTerm WebConnect? stunnel.conf: [tssl] accept = 992 connect = 23 (can't use telnet port) I know I can't use "connect = 22" because it doesn't work. Any idea? I really need your help... --------------- Tom Spence

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Re: [stunnel-users] Connecting to stunnel with SQLServer
by Mohit Anchlia 29 Jun '10

29 Jun '10

Has anyone else tried using Java SSL or anything using Java that will not require stunnel on the client side? On Fri, Jun 25, 2010 at 12:13 PM, Carter Browne <cbrowne(a)cbcs-usa.com> wrote: > On 6/24/2010 11:00 PM, Mohit Anchlia wrote: >> On Thu, Jun 24, 2010 at 10:27 AM, Carter Browne <cbrowne(a)cbcs-usa.com> wrote: >> >>> On 6/24/2010 12:09 PM, Mohit Anchlia wrote: >>> >>>> On Thu, Jun 24, 2010 at 5:14 AM, Carter Browne <cbrowne(a)cbcs-usa.com> wrote: >>>> >>>> >>>>> It is very easy to do if you have stunnel running on both ends. On the >>>>> client side in the configuration file you could have: >>>>> >>>>> [MSSQL-OUT] >>>>> accept = localhost:1433 >>>>> connect = remote:20000 >>>>> client = yes >>>>> >>>>> >>>> Thanks. So if I have stunnel running on both ends how do I connect to >>>> SQL server? Just open a JDBC connection on the local port and it will >>>> automatically connect on the remote side? >>>> >>>> >>> In this example, I would define an alias using the configuration manager >>> giving it your name for the data base, and having it connect to port >>> 1433 on localhost. For my systems, >>> I usually use a dummy name defined in the 127.0.0.0/8 net and some port >>> other than 1433. This approach does require stunnel on both ends. I >>> haven't tried any other approaches. >>> MS SQL server does have some options for encrypting the traffic as well >>> - I did not think they would work for my mixed Linux/Windows >>> environment, but it might work for your environment. >>> >>> >>> >>>> Also, are there any other options? We have 20 servers from which we >>>> need to connect. I was trying to avoid install of another binary and >>>> relying on it for being up and running. Is it possible to use Java >>>> SSL? Or is that too complicated and not proven to work? Not sure if >>>> there is any other option. >>>> >>>> >>>> >>>>> on the remote side have: >>>>> >>>>> [MSSQL-IN] >>>>> accept = 20000 >>>>> connect = 1433 >>>>> client = no >>>>> >>>>> In this example port 20000 would have to be open to any firewalls >>>>> including the Windows firewall and assumes you are using the standard >>>>> MSSQL port on the server. >>>>> >>>>> You would probably want to use the SQL Server Configuration Manager on >>>>> the client computer to add an alias for your data base. >>>>> >>>>> >> Our client will be on Linux box. I am trying to understand if I am >> using JDBC the connection URL is something like: >> >> jdbc:sqlserver://[serverName[\instanceName][:portNumber]][;property=value[;property=value]] >> >> So if I use stunnel on both sides then how will this work? What will I >> give in my connection string? >> > > I don't have a Java DB connection, so I cannot speak from experience. > For both the Windows and the Linux ODBC drivers, using the example above > the server name would be > localhost:1433. The Instance name and any properties that you send > would not change. Again, using the values in the example, stunnel is > simply mapping localhost:1433 to remote:1433. > > Carter >> >>>>> Carter >>>>> >>>>> Carter Browne >>>>> CBCS >>>>> cbrowne(a)cbcs-usa.com >>>>> 781-721-2890 >>>>> >>>>> >>>>> On 6/23/2010 11:32 PM, Mohit Anchlia wrote: >>>>> >>>>> >>>>>> We have a requirement to connect to a SQLServer that is connected >>>>>> through stunnel on the other end. Can I use java SSL to talk to >>>>>> stunnel? What are my options? >>>>>> _______________________________________________ >>>>>> stunnel-users mailing list >>>>>> stunnel-users(a)mirt.net >>>>>> http://stunnel.mirt.net/mailman/listinfo/stunnel-users >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>> >>> >> >

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stunnel question and behaviour
by eni-urgence 25 Jun '10

25 Jun '10

Hello all. I want to use stunnel as ssl terminatation for https and pass httpd request to haproxy. I have compiled stunnel (source http://www.stunnel.org/download/stunnel/src/stunnel-4.32.tar.gz ) and apply this patch http://haproxy.1wt.eu/download/patches/stunnel-4.32-xforwarded-for.diff. I have placed the binary in /usr/local/bin . I want to use the heartbeat capabilities and start stunnel only if VIP is on the node. In order to make that, the init script of stunnel must be LSB compatible like said http://www.linux-ha.org/LSBResourceAgent. When i made a /etc/init.d/stunnel stop then a /etc/init.d/stunnel start, the service wont start . in order to reproduce make a //etc/init.d/stunnel start/ /ps -ef/ said stunnel 30301 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30302 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30303 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30304 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30305 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30306 1 0 13:21 ? 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf Is it normal there is many process of stunnel ? And only the last pid process with ? in place of pts/2 is on the pid file. //etc/init.d/stunnel stop/ /ps -ef /said /stunnel 30306 1 0 13:21 ? 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf/ /and / //etc/init.d/stunnel start/ / DÃ©marrage de stunnel :Reading configuration from file /etc/stunnel/stunnel.conf FIPS mode disabled RAND_status claims sufficient entropy for the PRNG PRNG seeded successfully Certificate: /path_to_mycrt Certificate loaded Key file: /path_to_my_key Private key loaded SSL context initialized for servicemy_domaine_name Configuration successful No limit detected for the number of clients FD=9 in non-blocking mode FD=10 in non-blocking mode FD=11 in non-blocking mode Option SO_REUSEADDR set on accept socket Error binding secure.scan-prod.com to 192.168.100.156:443 bind: Address already in use (98)/ return code 1 after stop there is a remaining stunnel process. It appears that this process is the one which the pid had been added to pidfile a /file /usr/local/bin/stunnel /said //usr/local/bin/stunnel: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped/ /usr/local/bin/stunnel -version said /stunnel 4.32 on x86_64-unknown-linux-gnu with OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008/ /Threading:PTHREAD SSL:ENGINE,FIPS Sockets:POLL,IPv6 Auth:LIBWRAP/ /Global options/ /debug = daemon.notice/ /pid = /usr/local/var/run/stunnel/stunnel.pid/ /RNDbytes = 64/ /RNDfile = /dev/urandom/ /RNDoverwrite = yes/ /Service-level options/ /cert = /usr/local/etc/stunnel/stunnel.pem/ /ciphers = FIPS/ /session = 300 seconds/ /stack = 65536 bytes/ /sslVersion = TLSv1/ /TIMEOUTbusy = 300 seconds/ /TIMEOUTclose = 60 seconds/ /TIMEOUTconnect = 10 seconds/ /TIMEOUTidle = 43200 seconds/ /verify = none/ my stunnel.conf is like that /; Protocol version (all, SSLv2, SSLv3, TLSv1)/ /sslVersion = all/ /setuid = stunnel/ /setgid = stunnel/ /chroot = /var/chroot/stunnel/ /pid = /var/run/stunnel.pid/ /output = /var/log/stunnel.log/ /debug = 5/ /fips = no/ /socket=l:TCP_NODELAY=1/ /socket=r:TCP_NODELAY=1/ /[my_domain]/ /key = /path_to_my_key/ /cert = /path_to_mycrt/ /accept = 192.168.100.156:443/ /connect = 192.168.100.156:10443/ /xforwardedfor = yes/ /TIMEOUTclose = 0 Thanks for your help /

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stunnel and heartbeat
by eni-urgence 25 Jun '10

25 Jun '10

Hello all. I want to use stunnel as ssl terminatation for https and pass httpd request to haproxy. I have compiled stunnel (source http://www.stunnel.org/download/stunnel/src/stunnel-4.32.tar.gz ) and apply this patch http://haproxy.1wt.eu/download/patches/stunnel-4.32-xforwarded-for.diff. I have placed the binary in /usr/local/bin . I want to use the heartbeat capabilities and start stunnel only if VIP is on the node. In order to make that, the init script of stunnel must be LSB compatible like said http://www.linux-ha.org/LSBResourceAgent. When i made a /etc/init.d/stunnel stop then a /etc/init.d/stunnel start, the service wont start . in order to reproduce make a //etc/init.d/stunnel start/ /ps -ef/ said stunnel 30301 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30302 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30303 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30304 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30305 1 0 13:21 pts/2 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf stunnel 30306 1 0 13:21 ? 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf Is it normal there is many process of stunnel ? And only the last pid process with ? in place of pts/2 is on the pid file. //etc/init.d/stunnel stop/ /ps -ef /said /stunnel 30306 1 0 13:21 ? 00:00:00 /usr/local/bin/stunnel /etc/stunnel/stunnel.conf/ /and / //etc/init.d/stunnel start/ / DÃ©marrage de stunnel :Reading configuration from file /etc/stunnel/stunnel.conf FIPS mode disabled RAND_status claims sufficient entropy for the PRNG PRNG seeded successfully Certificate: /path_to_mycrt Certificate loaded Key file: /path_to_my_key Private key loaded SSL context initialized for servicemy_domaine_name Configuration successful No limit detected for the number of clients FD=9 in non-blocking mode FD=10 in non-blocking mode FD=11 in non-blocking mode Option SO_REUSEADDR set on accept socket Error binding secure.scan-prod.com to 192.168.100.156:443 bind: Address already in use (98)/ return code 1 after stop there is a remaining stunnel process. It appears that this process is the one which the pid had been added to pidfile a /file /usr/local/bin/stunnel /said //usr/local/bin/stunnel: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped/ /usr/local/bin/stunnel -version said /stunnel 4.32 on x86_64-unknown-linux-gnu with OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008/ /Threading:PTHREAD SSL:ENGINE,FIPS Sockets:POLL,IPv6 Auth:LIBWRAP/ /Global options/ /debug = daemon.notice/ /pid = /usr/local/var/run/stunnel/stunnel.pid/ /RNDbytes = 64/ /RNDfile = /dev/urandom/ /RNDoverwrite = yes/ /Service-level options/ /cert = /usr/local/etc/stunnel/stunnel.pem/ /ciphers = FIPS/ /session = 300 seconds/ /stack = 65536 bytes/ /sslVersion = TLSv1/ /TIMEOUTbusy = 300 seconds/ /TIMEOUTclose = 60 seconds/ /TIMEOUTconnect = 10 seconds/ /TIMEOUTidle = 43200 seconds/ /verify = none/ my stunnel.conf is like that /; Protocol version (all, SSLv2, SSLv3, TLSv1)/ /sslVersion = all/ /setuid = stunnel/ /setgid = stunnel/ /chroot = /var/chroot/stunnel/ /pid = /var/run/stunnel.pid/ /output = /var/log/stunnel.log/ /debug = 5/ /fips = no/ /socket=l:TCP_NODELAY=1/ /socket=r:TCP_NODELAY=1/ /[my_domain]/ /key = /path_to_my_key/ /cert = /path_to_mycrt/ /accept = 192.168.100.156:443/ /connect = 192.168.100.156:10443/ /xforwardedfor = yes/ /TIMEOUTclose = 0 Thanks for your help /

1 0

error during multithreaded operation
by Bhavna Jhunjhunwala 24 Jun '10

24 Jun '10

Hi Users, I am having the same problem as listed in below thread. Is there a resolution? Appreciate any help in this matter! http://stunnel.mirt.net/pipermail/stunnel-users/2009-April/002353.html open ssl version: OpenSSL 0.9.8k 25 Mar 2009 stunnel version: stunnel -version stunnel 4.33 on i386-apple-darwin10.2.0 with OpenSSL 0.9.8k 25 Mar 2009 Threading:PTHREAD SSL:ENGINE Sockets:SELECT,IPv6 Auth:LIBWRAP Global options debug = daemon.notice pid = /usr/local/var/run/stunnel/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /usr/local/etc/stunnel/stunnel.pem ciphers = ALL:!aNULL:!eNULL:!SSLv2 session = 300 seconds stack = 65536 bytes sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none -- Thanks, Bhavna Quantitative Brokers DISCLAIMER: This e-mail and any attachments are for the confidential use of the intended recipient. If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited. This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any investment product, an official confirmation of any transaction or an official statement of Quantitative Brokers, LLC. E-mail transmissions cannot be guaranteed to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice. Quantitative Brokers may, at its discretion, monitor and review the content of all e-mail communications.

1 0

Connecting to stunnel with SQLServer
by Mohit Anchlia 23 Jun '10

23 Jun '10

We have a requirement to connect to a SQLServer that is connected through stunnel on the other end. Can I use java SSL to talk to stunnel? What are my options?

1 0

transfer() loop executes not transferring any data
by Nelson 21 Jun '10

21 Jun '10

I just setup stunnel to partner with haproxy to handle https. My concern is I saw the logs below on my stunnel logs. I don't know if I need to worry about this since my testing using https is doing fine. stunnel is forwarding https request to haproxy. 2010.06.22 07:57:27 LOG3[1363:2083728]: transfer() loop executes not transferring any data 2010.06.22 07:57:27 LOG3[1363:2083728]: please report the problem to Michal.Trojnara(a)mirt.net 2010.06.22 07:57:27 LOG3[1363:2083728]: protocol=TLSv1, check_SSL_pending=no 2010.06.22 07:57:27 LOG3[1363:2083728]: socket open: rd=yes wr=no, ssl open: rd=no wr=yes 2010.06.22 07:57:27 LOG3[1363:2083728]: socket ready: rd=no wr=no, ssl ready: rd=yes wr=no 2010.06.22 07:57:27 LOG3[1363:2083728]: wants: SSL_read rd=no wr=no, SSL_write rd=no wr=yes, SSL_shutdown rd=no wr=no 2010.06.22 07:57:27 LOG3[1363:2083728]: socket input buffer: 16384 byte(s), ssl input buffer: 0 byte(s) Thanks, Nelson

1 0

"choose a digital certificate" pop-up in IE
by KumpelJ 21 Jun '10

21 Jun '10

Hello I have browsed the archives but have not found the answer to this question... I have stunnel set up to handle https connections. It sits on a Debian server alongside HAProxy and works fine with every browser except for Internet Explorer. When I connect with Internet Explorer, I get a blank "Please choose a digital certificate" pop-up. How do we turn off the request for the client certificate in IE? Here are my details....thanks in advance. #vi /etc/stunnel/stunnel.conf verify=0 CAfile=/etc/ssl/certs/chain.pem cert=/etc/ssl/certs/multidomain.pem CApath=/etc/ssl/certs/ pid = /etc/stunnel/stunnel.pid debug = 3 output = /etc/stunnel/stunnel.log socket=l:TCP_NODELAY=1 socket=r:TCP_NODELAY=1 client=no [https] accept=192.168.11.32:443 connect=localhost:444 TIMEOUTclose=0 xforwardedfor=yes #usr/local/bin/stunnel -version stunnel 4.32 on x86_64-unknown-linux-gnu with OpenSSL 0.9.8g 19 Oct 2007 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Global options debug = daemon.notice pid = /usr/local/var/run/stunnel/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /usr/local/etc/stunnel/stunnel.pem ciphers = AES:ALL:!aNULL:!eNULL:+RC4:@STRENGTH session = 300 seconds stack = 65536 bytes sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none -- View this message in context: http://old.nabble.com/%22choose-a-digital-certificate%22-pop-up-in-IE-tp286… Sent from the Stunnel - Users mailing list archive at Nabble.com.

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stunnel dies on logoff
by Bhavna Jhunjhunwala 17 Jun '10

17 Jun '10

Hi, I am using quickfix application to connect to an exchange and receive market data. The connectivity to exchange is through SSL and am using stunnel 4.15. I see that stunnel dies, every time my quickfix application is restarted or sends a logout to server. Please let me know if a solution is in place. *Below is the stunnel.conf file:* cert = /home/bhavna/workspace/stunnel/str10100str.pem key = /home/bhavna/workspace/stunnel/str10100str.pem ; Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 ; Some debugging stuff useful for troubleshooting debug = 7 output = /home/bhavna/workspace/stunnel/stunnel.log pid = /home/bhavna/workspace/stunnel/stunnel.pid ; Use it for client mode client = yes ; Service-level configuration [currenex_stream] ;accept = 127.0.0.1:1109 accept = 1110 ;prod details connect = server_IP:port TIMEOUTclose = 10 *Below are the version details of stunnel:* > ./stunnel -version stunnel 4.15 on x86_64-redhat-linux-gnu with OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = 5 pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = AES:ALL:!aNULL:!eNULL:+RC4:@STRENGTH key = /etc/stunnel/stunnel.pem session = 300 seconds TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none *Logs:* 2010.06.16 18:59:23 LOG7[6401:1084586304]: SSL alert (read): warning: close notify 2010.06.16 18:59:23 LOG7[6401:1084586304]: SSL closed on SSL_read 2010.06.16 18:59:23 LOG7[6401:1084586304]: Socket write shutdown 2010.06.16 18:59:23 LOG7[6401:1084586304]: SSL write shutdown 2010.06.16 18:59:23 LOG7[6401:1084586304]: SSL alert (write): warning: close notify 2010.06.16 18:59:23 LOG6[6401:1084586304]: SSL_shutdown successfully sent close_notify 2010.06.16 18:59:23 LOG5[6401:1084586304]: Connection closed: 109 bytes sent to SSL, 129 bytes sent to socket 2010.06.16 18:59:23 LOG7[6401:1084586304]: currenex_stream finished (0 left) -- Thanks, Bhavna DISCLAIMER: This e-mail and any attachments are for the confidential use of the intended recipient. If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited. This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any investment product, an official confirmation of any transaction or an official statement of Quantitative Brokers, LLC. E-mail transmissions cannot be guaranteed to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice. Quantitative Brokers may, at its discretion, monitor and review the content of all e-mail communications.

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Re: [stunnel-users] Stunnel supports ECC certificate?
by Bao, Robert 08 Jun '10

08 Jun '10

To those who may find it useful: Mike came to rescure. He provided some new code and gave me the modified file to try out. It worked very well so far, problem solved. He plans to release the change in the next revision. Thanks a lot Mike. Robert Bao > _____________________________________________ > From: Bao, Robert > Sent: Thursday, June 03, 2010 2:14 PM > To: 'stunnel-users(a)mirt.net' > Subject: Stunnel supports ECC certificate? > > I searched the entire archive, couldn't find the answer/solution I am > looking for. I have to post to this group, and appreciate any > help/suggestion from any you. > > I use the latest 1.0.0 OpenSSL and 4.33 Stunnel. > > I used OpenSSL commands that very similar to what is described in the > following link to create the ECC certificate and the private key file. > http://src.opensolaris.org/source/xref/sfw/usr/src/lib/openssl/openssl > -0.9.8n/demos/ssltest-ecc/ECC-RSAcertgen.sh > > Start Stunnel, see the following errors: > Key file: (actual path to the private key file)\HOST.KEY > error stack: 140B3009 : error:140B3009:SSL > routines:SSL_CTX_use_RSAPrivateKey_file:PEM lib > SSL_CTX_use_RSAPrivateKey_file: 607907F: error:0607907F:digital > envelope routines:EVP_PKEY_get1_RSA:expecting an rsa key > > There was a similar posting 4-5 years ago, and Mike answered it (the > answer was: Stunnel didn't support ECC at that time). > http://stunnel.mirt.net/pipermail/stunnel-users/2005-October/000817.ht > ml > > Seems like this is still true today. Then, when the ECC support will > be added to Stunnel? > > If Stunnel already supports ECC certificate, how do I make it work? > > Thanks. > > Robert Bao > Software House > Tyco International > 978-577-4202 > > Explore our new Tyco Online Learning Center Web-based Training Bundles > at: www.swhouse.com/support/tyco_online_learning_center.aspx > > This e-mail may contain or have attached to it information or > technology the export or re-export of which is restricted by U.S. laws > and regulations. By viewing this e-mail and any attachments, the > recipient agrees to the following: (i) the recipient's use of the > contents of this e-mail and any attachments shall comply with all > applicable laws, rules and regulations, including, without limitation, > U.S. international trade laws and regulations, and (ii) the recipient > may not transfer or otherwise export or re-export any information or > technology contained in this e-mail or any attachment except in full > compliance with the export controls administered by the U.S. and other > countries and any applicable import and use restrictions. >

1 0

STunnel client on Android?
by Marcel Bokhorst 08 Jun '10

08 Jun '10

Hi, Is it possible to use STunnel as client on Android? Regards, Marcel

2 1

stunnel 4.33 stops (crashes?) after undetermined running time
by Markus Borst 07 Jun '10

07 Jun '10

Hi, I have a strange problem with current stunnel (4.33): It just crashes after some time. The time is variable, I suspect it stops after a number of connections. System: - Windows Server 2003 SP2 (also happens on Windows Server 2008R2) - stunnel runs as service - stunnel is configured to run as ssl server for imap and pop3 with our certificate (including key-chain) stunnel was running fine for years on the Windows Server 2003. After upgrade to stunnel 4.33, the stunnel service process first worked fine, the just stopped working after some time: - The windows service "stunnel" was stopped - the stunnel.log (standard debug level) showed not error or other entry at the time of the stop. - The windows eventlog shows: ====== Event 7034, Service Control Manager The stunnel service terminated unexpectedly. It has done this 1 time(s). ====== (I'm not 100% sure, whether this event log message corresponds to the stunnel crash I described or to another crash.) I have downgrade to version 4.32, the stunnel service now runs uninterrupted as before. Since the time of crash varies somewhat, seemingly with the current load of the server, I suspect that stunnel crashes after a certain amount of ssl connections, but I'm not sure. This has happened on two different servers (Windows Server 2003 SP2 and Windows Server 2008 R2). Is this a known problem? I'd love to do some further tests, but since this is a production system, I cannot test it in our normal environment. A program to generate random ssl connections would come handy to further analyze the problem. Greetings Markus Borst -- TU Darmstadt Hochschulrechenzentrum (HRZ) Markus Borst Adresse: Petersentrasse 30, 64287 Darmstadt, Germany Tel.: 06151/16-2056 Email: M.Borst(a)hrz.tu-darmstadt.de

2 2

Three patches: DNS CommonName verification support, separated stderr/foreground options, and support for minimal ssl libs
by Tristan Schmelcher 07 Jun '10

07 Jun '10

Hello, Recently I started using stunnel in an embedded Linux product and I had need to add several features that I think other users would benefit from. I have attached them as separate patches against 4.33. I hereby release them into the public domain. Here is a description of each: stunnel-4.33-handle-minimal-ssl-libs.patch: Add support for building against a libssl/libcrypo that has had various non-essential features removed via the "no-<feature>" Configure options for openssl. This requires disabling non-essential Stunnel features at compile-time if they have dependencies on disabled libssl/libcrypto features. For memory-constrained embedded systems, this is a big win. With this patch I was able to cut the memory footprint of stunnel+openssl by about a third simply by disabling openssl features that I didn't need. stunnel-4.33-separate-stderr-option.patch This splits the stderr logging effect of the "foreground" option into a separate option named "stderr", so that users have the freedom to enable foreground without stderr logging, or vice versa. For backwards compatibility though, specifying foreground = yes implies stderr = yes unless followed in the config by stderr = no. This is useful on embedded Linux systems that lack an implementation of fork() (due to the processor not having an MMU), because on such systems every daemon has to be launched in a foreground mode and pre-daemonized with the simpler vfork() function, e.g. using "&" from a shell. In this mode, logging to stderr does not make sense, because in reality the process is still a daemon so the logging clutters the terminal. stunnel-4.33-dns-commonname-verify-support.patch: I saved the best for last. ;) This adds a "verify_dns" option to check the CommonName in peer certificates against their DNS name when verifying, much as web browsers do. I have seen posts from users asking for this feature in the past, so I think it's value is self-evident. I'd also like to take this opportunity to say that I'm a long-time user of Stunnel on my personal Linux desktop machine and it is a really excellent piece of software. Thank you for making it free and open source.

3 8

Stunnel supports ECC certificate?
by Bao, Robert 03 Jun '10

03 Jun '10

I searched the entire archive, couldn't find the answer/solution I am looking for. I have to post to this group, and appreciate any help/suggestion from any you. I use the latest 1.0.0 OpenSSL and 4.33 Stunnel. I used OpenSSL commands that very similar to what is described in the following link to create the ECC certificate and the private key file. http://src.opensolaris.org/source/xref/sfw/usr/src/lib/openssl/openssl-0 .9.8n/demos/ssltest-ecc/ECC-RSAcertgen.sh Start Stunnel, see the following errors: Key file: (actual path to the private key file)\HOST.KEY error stack: 140B3009 : error:140B3009:SSL routines:SSL_CTX_use_RSAPrivateKey_file:PEM lib SSL_CTX_use_RSAPrivateKey_file: 607907F: error:0607907F:digital envelope routines:EVP_PKEY_get1_RSA:expecting an rsa key There was a similar posting 4-5 years ago, and Mike answered it (the answer was: Stunnel didn't support ECC at that time). http://stunnel.mirt.net/pipermail/stunnel-users/2005-October/000817.html Seems like this is still true today. Then, when the ECC support will be added to Stunnel? If Stunnel already supports ECC certificate, how do I make it work? Thanks. Robert Bao Software House Tyco International 978-577-4202 Explore our new Tyco Online Learning Center Web-based Training Bundles at: www.swhouse.com/support/tyco_online_learning_center.aspx This e-mail may contain or have attached to it information or technology the export or re-export of which is restricted by U.S. laws and regulations. By viewing this e-mail and any attachments, the recipient agrees to the following: (i) the recipient's use of the contents of this e-mail and any attachments shall comply with all applicable laws, rules and regulations, including, without limitation, U.S. international trade laws and regulations, and (ii) the recipient may not transfer or otherwise export or re-export any information or technology contained in this e-mail or any attachment except in full compliance with the export controls administered by the U.S. and other countries and any applicable import and use restrictions.

1 0

deploy stunnel
by Arko-Quick, Patricia K 02 Jun '10

02 Jun '10

Is there a way to deploy stunnel to all users versus the current user logged in? I would like to deploy it with sms to all users of the machine.

1 0

Default for TIMEOUTidle?
by Markus Borst 27 May '10

27 May '10

I want to modify TIMEOUTidle in our configuration. To be sure to set it to sensible values, I need to know the default value, but I can't find it in the docs. Greetings Markus Borst -- TU Darmstadt Hochschulrechenzentrum (HRZ) Markus Borst Adresse: Petersentrasse 30, 64287 Darmstadt, Germany Tel.: 06151/16-2056 Email: M.Borst(a)hrz.tu-darmstadt.de

1 0

Transparent mode, alternative env.c
by Hans Werner Strube 25 May '10

25 May '10

The method for passing the remote address and port to an exec'ed program through getenv() calls in the preloaded libstunnel.so fails for programs that clean the environment initially. This can be circumvented placing getenv() in an _init() function and storing the results in static variables. Here is my alternative env.c (without the copyright and license), which I have been using for more than a year: * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * /* getpeername() can't be declared in the following includes */ #define getpeername no_getpeername #include <sys/types.h> #include <sys/socket.h> /* for AF_INET */ #include <netinet/in.h> #include <arpa/inet.h> /* for inet_addr() */ #include <stdlib.h> /* for getenv() */ #ifdef __BEOS__ #include <be/bone/arpa/inet.h> /* for AF_INET */ #include <be/bone/sys/socket.h> /* for AF_INET */ #else #include <sys/socket.h> /* for AF_INET */ #endif #undef getpeername static uint32_t rem_host=0; static uint16_t rem_port=0; /* Requires shared-library linking by ld, not cc (except with gcc -nostdlib) */ void _init() { char *value; if((value=getenv("REMOTE_HOST")) && *value != '\0') rem_host = inet_addr(value); if((value=getenv("REMOTE_PORT")) && *value != '\0') rem_port = htons(atoi(value)); } int getpeername(int s, struct sockaddr_in *name, int *len) { char *value; name->sin_family = AF_INET; name->sin_addr.s_addr = rem_host; name->sin_port = rem_port; return 0; } /* End of env.c */

1 0

STRLEN in common.h may be too small
by Hans Werner Strube 25 May '10

25 May '10

In common.h of stunnel-4.x, the parameter STRLEN (used for many buffers) is set to 256. This is insufficient in some cases, e.g., the CAPABILITY response of an IMAP server or the pathname of a file may be too long, resulting in errors. If you encounter such cases (e.g., messages "Input line too long"), increase STRLEN, e.g., to 512.

1 0

Using stunnel to RDP into a SSL-enabled Windows box
by Daren Krive 11 May '10

11 May '10

Hi everyone, First of all I apologize if this has been asked before or if I am totally misunderstanding the purpose of stunnel altogether. If so please bear with my ignorance. I am an IT consultant and I manage about 20+ Windows-based servers. Some of these servers are accessible via VPN while others are accessible directly via RDP over the Internet. For those that are exposed to the net I am using the SSL certificate feature of Remote Desktop by going into “Terminal Services Configuration” and configuring the connection to use an SSL (most of the time a self-signed cert). I can connect to these machines no problem from Windows and I get a “lock” icon in my RDP client. However I cannot connect to these machines using rdestkop under Ubuntu. I have determined that if I turn off the requirement to use SSL on the server side (and instead allow the connection to use the built-in encryption of RDP) then I am able to connect with rdesktop. I would very much like to avoid rebooting just to connect to these servers. I am also not willing to remove the requirement for the SSL connection. Is there a way I can use stunnel on my Ubuntu box to first establish a secure SSL connection and then use rdesktop over that connection? I have searched high and low for info on this and found nothing. I have found instructions on how to use the Windows version of stunnel to secure RDP but that isn’t what I am trying to do. The server is already using an SSL cert to encrypt the connection (not sure how many people know Windows 2003 and up can do this). I am looking to get around the apparent lack of SSL support in rdesktop. Best regards, Daren.

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