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Faulting application stunnel-4.05.exe
by Paulo Cesar Soares da Silva 18 Nov '04

18 Nov '04

stunnel-4.05.exe executed as a service presents the following problems: Faulting application stunnel-4.05.exe, version 0.0.0.0, faulting module libssl32.dll, version 0.0.0.0, fault address 0x00006cd8. Faulting application stunnel-4.05.exe, version 0.0.0.0, faulting module libeay32.dll, version 0.0.0.0, fault address 0x000564ec. The application, C:\Program Files\Crivo\tn3270\stunnel-4.05.exe, generated an application error The error occurred on 11/10/2004 @ 15:37:13.875 The exception generated was c0000005 at address 6B086CD8 (libssl32!SSL_set_session) Faulting application stunnel-4.05.exe, version 0.0.0.0, faulting module ntdll.dll, version 5.2.3790.0, fault address 0x000086f7. Environment: Hardware IBM 86496BX Dual processor 3 GHz Software OS Name Microsoft(R) Windows(R) Server 2003, Standard Edition , Version 5.2.3790 Build 3790 The following files are in same folder (..\Program Files\Teste\Stunnel) stunnel-4.05.exe, 4.05 libeay32.dll, openssl-0.9.7d-zlib libssl32.dll, openssl-0.9.7d-zlib Comntents of stunnel.conf: client = yes verify = 0 service = stunnel 4.05 options = DONT_INSERT_EMPTY_FRAGMENTS [data] accept = localhost:3500 connect = www.teste.com.br:443 delay = yes I would appreciate if anyone can help me on this? many thanks in advance! Paulo Cesar Soares da Silva (11) 3231-5396 pcesar(a)crivo.com.br --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com) Version: 6.0.794 / Virus Database: 538 - Release Date: 10/11/2004

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List of Distinguished names in Certificate Request message
by Diarmuid O'Neill 17 Nov '04

17 Nov '04

Hi, At the moment, stunnel's client certificate verification implementation does not include any Distinguished Names (of the trusted CA certificates configured) in the Request Certificate message. Strictly speaking this violates RFC2246 (see below, apologies for formatting), but to date I've only seen one client that has a problem with it. Explorer deals with this by displaying all available user certificates. If the Distinguished Names are included in the cert req it only displays client certs signed by the appropriate CAs. The patch below does the necessary openssl bits and pieces to make up the lists of DNs so they're sent with the certificate requests. This has been tested under linux only. 7.4.4. Certificate request When this message will be sent: A non-anonymous server can optionally request a certificate from the client, if appropriate for the selected cipher suite. This message, if sent, will immediately follow the Server Key Exchange message (if it is sent; otherwise, the Server Certificate message). Structure of this message: enum { rsa_sign(1), dss_sign(2), rsa_fixed_dh(3), dss_fixed_dh(4), (255) } ClientCertificateType; opaque DistinguishedName<1..2^16-1>; struct { ClientCertificateType certificate_types<1..2^8-1>; DistinguishedName certificate_authorities<3..2^16-1>; } CertificateRequest; certificate_types This field is a list of the types of certificates requested, sorted in order of the server's preference. certificate_authorities A list of the distinguished names of acceptable certificate authorities. These distinguished names may specify a desired distinguished name for a root CA or for a subordinate CA; thus, this message can be used both to describe known roots and a desired authorization space. Note: DistinguishedName is derived from [X509]. Note: It is a fatal handshake_failure alert for an anonymous server to request client identification. Thanks, Diarmuid. <<stunnel-4.05_ca_list.patch>> ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the postmaster at the address below. ITS-Support(a)aepsystems.com Unless the contrary is specifically indicated above nothing in this message is intended to constitute an electronic signature within the meaning of the Electronic Commerce Act 2000 or similar legislation enacted elsewhere in the world. This footnote also confirms that this email message has been swept for the presence of computer viruses. *****************************************************************************

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How to run stunnel in client and server mode on the same machine?
by Àëåêñåé Êàìåíåâ Íèêî ëàåâè÷ 17 Nov '04

17 Nov '04

I have a task: ecript traffic for my db server(m1) and www/smtp server(m2) I install stunnel on both machines (m1 and m2) then wrote config files m1: ... client = no ... [mssql] accept=1434 connect=1433 m2: ... client=no ... [smtp] accept=465 connect=25 and m3: some client machine ... client=yes ... [mssql] accept=1433 connect=m1:1434 [smtp] accept=25 connect=m2:465 when I connect to db m3->m1 - ok when I send mail m3->m2 - ok but when I connect to db m2->m1 - failed how configure m2 stunnel to let him work in client and server mode ?

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Log file rotation
by Jalasutram, Srivatsava 16 Nov '04

16 Nov '04

Is there a way in the latest version of stunnel for rotating the log files? Thanks, Sri

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always open VPN channel
by Andrisi 15 Nov '04

15 Nov '04

I'd like to access a PC behind a firewall with VNC. I initiate a link from the PC behind the firewall. This tunnel should always be enabled. Then I use VNCClient on my home PC and connect to localhost:6000 which is linked to the firewalled PC-s VNC server port. Is it possible and if so, how? The server and client roles are a bit mixed up here....

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inetd Solaris Stunnel 4.05
by Kenneth Simpson 12 Nov '04

12 Nov '04

Hi - I'm trying to get stunnel 4.05 to work under inetd on a Solaris x86 platform (and Solaris 8 on a SPARC platform.) The IMAP and POP daemons are verison 2004 from UW (or UW 2001 on a SPARC.) The IMAP client is Thunderbird 0.8. I can connect to IMAP inetd service on port 143 with Thunderbird. When I attempt to connect to IMAP on port 993, I'm presented a self signed certificate, I click OK to accept it, then Thunderbird just hangs. There's no indication in IMAP log file that I've connected - and there doesn't appear to be any indication in the stunnel log file that I've been connected to the IMAP server either. stunnel and the IMAP servers work in the standalone mode. When stunnel is running under inetd, I can telnet to port 143 and port 993. Any help would be greatly appreciated. -- Ken ; stunnel -version stunnel 4.05 on i386-pc-solaris2.8 FORK with OpenSSL 0.9.7d 17 Mar 2004 Global options cert = /usr/stunnel/etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH debug = 5 key = /usr/stunnel/etc/stunnel/stunnel.pem pid = /usr/stunnel/var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes session = 300 seconds verify = none Service-level options TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTidle = 43200 seconds; stunnel -sockets Socket option defaults: Option Accept Local Remote OS default SO_DEBUG -- -- -- 0 SO_DONTROUTE -- -- -- 0 SO_KEEPALIVE -- -- -- 0 SO_LINGER -- -- -- 0:0 SO_OOBINLINE -- -- -- 0 SO_RCVBUF -- -- -- 32768 SO_SNDBUF -- -- -- 32768 SO_RCVLOWAT -- -- -- -- SO_SNDLOWAT -- -- -- -- SO_RCVTIMEO -- -- -- -- SO_SNDTIMEO -- -- -- -- SO_REUSEADDR 1 -- -- 0 IP_TOS -- -- -- 0 IP_TTL -- -- -- 64 TCP_NODELAY -- -- -- 0 ; inetd.conf # imap stream tcp nowait root /usr/imap/sbin/in.imapd /usr/imap/sbin/in.imapd pop3 stream tcp nowait root /usr/imap/sbin/in.pop3d /usr/imap/sbin/in.pop3d # imaps stream tcp nowait root /usr/stunnel/sbin/stunnel /usr/stunnel/sbin/stunnel /usr/stunnel/etc/stunnel.conf pop3s stream tcp nowait root /usr/stunnel/sbin/stunnel /usr/stunnel/sbin/stunnel /usr/stunnel/etc/stunnel.conf ssmtp stream tcp nowait root /usr/stunnel/sbin/stunnel /usr/stunnel/sbin/stunnel /usr/stunnel/etc/stunnel.conf ; stunnel.conf # cert = /usr/openssl/certs/stunnel.pem #chroot = /usr/stunnel/var/run/ #pid=/stunnel.pid pid= setuid = nobody setgid = nogroup debug = local2.7 output = /var/adm/log/stunnel exec = /usr/imap/sbin/in.pop3d execargs = /usr/imap/sbin/in.pop3d exec = /usr/imap/sbin/in.imapd execargs = /usr/imap/sbin/in.imapd exec = /usr/lib/sendmail execargs = /usr/lib/sendmail # # end stunnel.conf # ; log file 2004.11.11 14:52:25 LOG5[7844:0]: stunnel 4.05 on i386-pc-solaris2.8 FORK with OpenSSL 0.9.7d 17 Mar 2004 2004.11.11 14:52:25 LOG7[7844:0]: Snagged 64 random bytes from /dev/urandom 2004.11.11 14:52:25 LOG7[7844:0]: RAND_status claims sufficient entropy for the PRNG 2004.11.11 14:52:25 LOG6[7844:0]: PRNG seeded successfully 2004.11.11 14:52:25 LOG7[7844:0]: Certificate: /usr/openssl/certs/stunnel.pem 2004.11.11 14:52:25 LOG7[7844:0]: Key file: /usr/openssl/certs/stunnel.pem 2004.11.11 14:52:25 LOG7[7844:0]: stunnel started 2004.11.11 14:52:25 LOG5[7844:0]: stunnel connected from 10.0.0.15:58715 2004.11.11 14:52:25 LOG7[7844:0]: SSL state (accept): before/accept initialization 2004.11.11 14:52:25 LOG7[7844:0]: SSL state (accept): SSLv3 read client hello A 2004.11.11 14:52:25 LOG7[7844:0]: SSL state (accept): SSLv3 write server hello A 2004.11.11 14:52:25 LOG7[7844:0]: SSL state (accept): SSLv3 write certificate A 2004.11.11 14:52:25 LOG7[7844:0]: SSL state (accept): SSLv3 write server done A 2004.11.11 14:52:25 LOG7[7844:0]: SSL state (accept): SSLv3 flush data 2004.11.11 14:52:26 LOG7[7844:0]: SSL state (accept): SSLv3 read client key exchange A 2004.11.11 14:52:26 LOG7[7844:0]: SSL state (accept): SSLv3 read finished A 2004.11.11 14:52:26 LOG7[7844:0]: SSL state (accept): SSLv3 write change cipher spec A 2004.11.11 14:52:26 LOG7[7844:0]: SSL state (accept): SSLv3 write finished A 2004.11.11 14:52:26 LOG7[7844:0]: SSL state (accept): SSLv3 flush data 2004.11.11 14:52:26 LOG7[7844:0]: 1 items in the session cache 2004.11.11 14:52:26 LOG7[7844:0]: 0 client connects (SSL_connect()) 2004.11.11 14:52:26 LOG7[7844:0]: 0 client connects that finished 2004.11.11 14:52:26 LOG7[7844:0]: 0 client renegotiatations requested 2004.11.11 14:52:26 LOG7[7844:0]: 1 server connects (SSL_accept()) 2004.11.11 14:52:26 LOG7[7844:0]: 1 server connects that finished 2004.11.11 14:52:26 LOG7[7844:0]: 0 server renegotiatiations requested 2004.11.11 14:52:26 LOG7[7844:0]: 0 session cache hits 2004.11.11 14:52:26 LOG7[7844:0]: 0 session cache misses 2004.11.11 14:52:26 LOG7[7844:0]: 0 session cache timeouts 2004.11.11 14:52:26 LOG6[7844:0]: Negotiated ciphers: AES256-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(2 56) Mac=SHA1 2004.11.11 14:52:26 LOG6[7844:0]: Local mode child started (PID=7845) 2004.11.11 14:52:26 LOG7[7844:0]: Remote FD=7 initialized ; netstat -nr | grep 143 *.143 *.* 0 0 32768 0 LISTEN ; netstat -nr | grep 993 *.993 *.* 0 0 32768 0 LISTEN

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RE: [stunnel-users] SSL Engine patch on Windows?
by Diarmuid O'Neill 11 Nov '04

11 Nov '04

Sorry Kartik, I'm not familiar with Neil Dunbar's patch, and I haven't used stunnel on Windows. Not much use...am I? ;-) Diarmuid. -----Original Message----- From: Kartik Subbarao [mailto:subbarao@computer.org] Sent: 11 November 2004 00:33 To: stunnel-users(a)mirt.net Subject: Re: [stunnel-users] SSL Engine patch on Windows? Hi Diarmuid, I saw your response to my message, but I'm not sure what to make of it :-) The problem is not that I don't have the patch -- I do have the patch and have been able to apply it to the code. (BTW the patch that you posted seems to be missing the SSLEngineOpt parameter in Neil Dunbar's patch, which is required for opensc's engine_pkcs11.dll for specifying the vendor-specific PKCS11 library). My problem is that stunnel doesn't seem to be able to have OpenSSL dynamically load the engine DLL. If someone can tell me how to compile stunnel to do this on Windows, or if someone has been able to compile stunnel with the hardware engine patch successfully on Windows and is willing to share, that'd be great. Thanks, -Kartik _______________________________________________ stunnel-users mailing list stunnel-users(a)mirt.net http://stunnel.mirt.net/mailman/listinfo/stunnel-users ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the postmaster at the address below. ITS-Support(a)aepsystems.com Unless the contrary is specifically indicated above nothing in this message is intended to constitute an electronic signature within the meaning of the Electronic Commerce Act 2000 or similar legislation enacted elsewhere in the world. This footnote also confirms that this email message has been swept for the presence of computer viruses. *****************************************************************************

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When the Port is in the URL
by George, Bijoy 10 Nov '04

10 Nov '04

Hello Everyone, I am using stunnel-3.19 and am trying to forward port 12345 on my local machine to a URL that has the following syntax: http://TestBox1:7201/sourceApp/Calculate.do?type=sf I am not sure how to set the stunnel up in this instance, but have failed with the following command: stunnel -c -d localhost:12345 -r TestBox:7201 Can someone please shed some light on my plight! Thanks!

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Stunnel 4.05 engine patch
by Diarmuid O'Neill 10 Nov '04

10 Nov '04

Hi, A couple of people have asked, so here's a patch that should work with stunnel-4.05. Untar the source archive. Copy the patch to the stunnel-4.05 directory. Run patch -p1<stunnel-4.05-engine.diff. Run autoconf (Beware, i have seen make funnies which i think relate to the version of automake 1.4-p2 worked for me, 1.6 did not). Now build as normal. When running ./configure, be sure to include the --enable-ssl-engine option (see ./configure --help). To enable a particular engine, include a line in your conf file "SSLEngine = myengine". Thanks, Diarmuid. <<stunnel-4.05_engine-patch.diff>> ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the postmaster at the address below. ITS-Support(a)aepsystems.com Unless the contrary is specifically indicated above nothing in this message is intended to constitute an electronic signature within the meaning of the Electronic Commerce Act 2000 or similar legislation enacted elsewhere in the world. This footnote also confirms that this email message has been swept for the presence of computer viruses. *****************************************************************************

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Re: [stunnel-users] How to configure Stunnel for ICMP packets?
by Rutger Thomschitz 09 Nov '04

09 Nov '04

> > I have just started using Stunnel 4.04 with OpenSSL. This > > may seem a bit strange, but, I would like to configure > > Stunnel such that it will encrypt all my Ping packets. > > The reason in a nut shell is that I would like to use > > Ping to determine the network overhead added by SSL, as > > part of my research. How can I set up stunnel (i.e. > > stunnel.conf) to tunnel all ICMP (i.e. Ping) packets? > > If you compare ICMP ECHO REQUEST/REPLY to Stunnel in any > way then your research is useless. It's an apples to oranges > comparison. You're comparing ICMP to TCP. > > Better is to compare TCP to TCP. For example, create a client/server > protocol as follows: > > * The TCP connection is established. > * The client sends one integer that is the length of the data, > followed by the data itself. Call this a 'packet' if you will. > * The server reads the integer, followed by the rest of the data, > and sends that data back. > * The client verifies the data was received correctly, and then > procedes to send a new 'packet'. > > > Then you can implement this connection on its own, and then via > Stunnel on both ends, and compare the results. Now you've got > apples-to-apples comparison. > > (Suggest you implement the server as an inetd-started application, > and start it from Stunnel via the 'exec' option, to keep the extra > cleartext TCP connection out of the mix.) > > Side possibilities: > > * Try alternate 'packet sizes' for comparison. > * Try different crypto protocols for comparison. > > > -- > Brian Hatch $it = $it || $another; > Systems and > Security Engineer > http://www.ifokr.org/bri/ Brian, Thank you for the advice and replying so quickly. Since my end goal was to see how additional network overhead due to security affects voice over IP (UDP), are there any other SSL enabled applications similar to Stunnel that supports UDP? (I am looking into Zebedee; however, it of course does not implement SSL.) Thanks again, Rutger Thomschutz -- ___________________________________________________________ Sign-up for Ads Free at Mail.com http://promo.mail.com/adsfreejump.htm

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