- stunnel-users - stunnel.org

CRL
by Uldis Biks 31 Aug '11

31 Aug '11

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stunnel : binding in ipv6+ipv4 : problem
by Guylhem Aznar 27 Aug '11

27 Aug '11

Hello I have a problem with stunnel : I just don't know how to specify 2 different port forwarding, one for all ipv4 connections to port 443, the other for all ipv6 connections. Either one seem to work, but I can't have both at the same time. In my /etc/hosts : 127.0.0.1 localhost ::1 localhost6 0.0.0.0 listenall4 :: listenall6 In my stunnel.conf: [sslh] accept = listenall4:443 connect = 127.0.0.1:444 TIMEOUTclose = 0 [ssl6] accept = listenall6:443 connect = 6.guylhem.org:80 TIMEOUTclose = 0 I have read that linux can block ipv6 sockets if the ipv4 socket is created first, but here the order doesn't change anything. I though that stunnel was ipv6 capable, but apparently it doesn't play well with ipv4 on the same port. So I tried to remove one of the listenall : the listenall4 is important, but listenall6 is not. Yet giving a AAAA only host like 6.guylhem.org does not help - even if it goes before the listenall4. So I'm stuck. Has anyone patched stunnel for such a situation? Guylhem

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FW: Mysql doesnt run with stunnel
by Freeh Sophia 26 Aug '11

26 Aug '11

Craig Retief <stunnel <at> rsw.co.za> writes: > > I see that on your server you have specified your config for mysqls like > this: > Hi Craig, That fixed it for me. Thanks! Freeh Sophia Marketing GmbH Emanuelstr. 3, 10317 Berlin Deutschland Telefon: +49 (33) 5310967 Email: freehsophia(a)gmail.com Site: http://flug.airego.de/

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stunnel4 tcp_nodelay
by Madhu R 21 Aug '11

21 Aug '11

Hi, We are using stunnel in order to tunnel http proxy traffic. Is it better in this case to turn on Nagle's algo? I have tried to set socket=l:TCP_NODELAY=0 and socket=r:TCP_NODELAY=0 in the global config, but when I look at debug log it keeps saying option tcp_nodelay is set on local and remote socket. Is this a bug, or is there a different way of turning off tcp_nodelay (since I understand this is on by default now) Regds

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Security issue in 4.4X effect older version?
by Richard L. Houston 19 Aug '11

19 Aug '11

Hi All, Sorry if this has been asked and answered. Saw the security warning about Stunnel 4.40 and 4.41 at http://www.securityfocus.com/bid/49254/info Are older version vulnerable as well or just those two specific versions? Specificity in the 4.2X series? Thanks for your help. +------------------------------------+ Best regards, -Richard Houston -R.L.H. Consulting -E-Mail rhouston(a)rlhc.net -WWW http://www.rlhc.net -Blog http://www.rlhc.net/blog/ -Twitter http://www.twitter.com/rlhc/

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centos 6 - stunnel 4.42 unusable (libssl trap divide error) in FIPS mode (default)
by draeath 19 Aug '11

19 Aug '11

I just finished building and configuring stunnel 4.42 on my x86_64 CentOS6 box. It appears to run, but not long into the SSL connection stunnel dies. Log info below. This only happens if I do NOT specify --disable-fips during ./configure (as it enables FIPS by default). I assume this is because FIPS compliancy requires a key to have a passphrase, which my key does not have? [root@host stunnel]# tail -f /var/log/stunnel.log /var/log/messages ==> /var/log/stunnel.log <== 2011.08.19 16:27:36 LOG7[31681:139656510936832]: Option TCP_NODELAY set on local socket 2011.08.19 16:27:36 LOG5[31681:139656510936832]: Service ntop accepted connection from 12.117.176.190:13258 2011.08.19 16:27:36 LOG7[31681:139656510936832]: SSL state (accept): before/accept initialization 2011.08.19 16:27:36 LOG7[31681:139656510936832]: SSL state (accept): SSLv3 read client hello A 2011.08.19 16:27:36 LOG7[31681:139656510936832]: SSL state (accept): SSLv3 write server hello A 2011.08.19 16:27:36 LOG7[31681:139656510936832]: SSL state (accept): SSLv3 write certificate A 2011.08.19 16:27:36 LOG7[31681:139656510936832]: SSL state (accept): SSLv3 write key exchange A 2011.08.19 16:27:36 LOG7[31681:139656510936832]: SSL state (accept): SSLv3 write server done A 2011.08.19 16:27:36 LOG7[31681:139656510936832]: SSL state (accept): SSLv3 flush data 2011.08.19 16:27:37 LOG7[31681:139656510936832]: SSL state (accept): SSLv3 read client key exchange A ==> /var/log/messages <== Aug 19 16:27:24 host stunnel: LOG5[31680:139656510941120]: FIPS mode enabled Aug 19 16:27:24 host stunnel: LOG6[31680:139656510941120]: Initializing SSL context for service ntop Aug 19 16:27:24 host stunnel: LOG4[31680:139656510941120]: Insecure file permissions on /usr/local/etc/stunnel/stunnel.pem Aug 19 16:27:24 host stunnel: LOG6[31680:139656510941120]: SSL context initialized Aug 19 16:27:24 host stunnel: LOG5[31680:139656510941120]: Configuration successful Aug 19 16:27:36 host stunnel: LOG5[31681:139656510936832]: Service ntop accepted connection from 12.117.176.190:13257 Aug 19 16:27:36 host stunnel: LOG3[31681:139656510936832]: SSL_accept: 1408F10B: error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number Aug 19 16:27:36 host stunnel: LOG5[31681:139656510936832]: Connection reset: 0 bytes sent to SSL, 0 bytes sent to socket Aug 19 16:27:36 host stunnel: LOG5[31681:139656510936832]: Service ntop accepted connection from 12.117.176.190:13258 Aug 19 16:27:37 host kernel: stunnel[31724] trap divide error ip:7f044fd0d3d1 sp:7f0450b98a40 error:0 in libssl.so.1.0.0[7f044fce2000+53000]

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Tr:SIP encryption with stunnel
by margot.basa 19 Aug '11

19 Aug '11

Hello all, Can someone give me information about SIP encryption with stunnel please ? Is it possible to transform a SIP message on TCP into a SIP TLS message with stunnel ? Thank you very much for your help, Regards > Message du 16/08/11 11:38 > De : "margot.basa" > A : stunnel-users(a)stunnel.org > Copie à : > Objet : SIP encryption with stunnel > > Hello all, I would like to know if stunnel is able to encrypt a SIP message (UDP or TCP => TLS...) For example: Terminal A can send/receive SIP messages on transport layer UDP or TCP but not TLS. Server B can send/receive SIP messages only in TLS. If terminal A sends a SIP REGISTER message to Server B, does stunnel is able to intercept the message and transform it ? port 5060 => port 5061 TCP => TLS sip uri => sips uri Do you think it's possible with stunnel ? Thank you very much for your input. Regards > > Une messagerie gratuite, garantie à vie et des services en plus, ça vous tente ? Je crée ma boîte mail www.laposte.net

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When X-FORWARDED-FOR for Stunnel ?
by Elodie BOSSIER 19 Aug '11

19 Aug '11

Greetings, Why you don't implement X-FORWARDED-FOR into stunnel ? I have found this patch : http://haproxy.1wt.eu/download/patches/stunnel-4.32-xforwarded-for.diff but this on is to much old, i'm with stunnel 4.41 and i can't go to 4.32 because i need SNI, implemented since 4.38 I have attempt to modify the patch to match with the current version, in begining it's ok but not after, all line code have changed and i'm not developer. X-FORWARDED-FOR is very important and exist on mostly all the frontend web and usuable by all the web server. Someone told me to switch to Nginx because X-FORWARDED-FOR don't exist in Stunnel ... I would like stay on Stunnel because it's only a light tunnel. The patch have only 219 lines, could you help me please to addapt it to the version 4.41 and/or add this feature into Stunnel please ? This is the "manual" to apply the patch : http://www.buro9.com/blog/2009/12/07/installing-haproxy-load-balance-http-a… Just need to add "xforwardedfor=yes" into your config file and should be OK. With this feature, I won't have need to "play" with this (censured) of transparent = source, iptables rules, tcpdump and root exec ... Thanks so much ... Elodie.

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stunnel 4.42 released
by Michal Trojnara 18 Aug '11

18 Aug '11

Dear Users, I have released version 4.42 of stunnel. This is a security bugfix release. Upgrade is highly recommended! The ChangeLog entry: Version 4.42, 2011.08.18, urgency: HIGH: * New features - New verify level 0 to request and ignore peer certificate. This feature is useful with the new Windows GUI menu to save cached peer certificate chains, as SSL client certificates are not sent by default. - Manual page has been updated. - Removed support for changing Windows Service name with "service" option. * Bugfixes - Fixed a heap corruption vulnerability in versions 4.40 and 4.41. It may possibly be leveraged to perform DoS or remote code execution attacks. - The -quiet commandline option was applied to *all* message boxes. - Silent install (/S option) no longer attempts to create stunnel.pem. Home page: http://www.stunnel.org/ Download: ftp://ftp.stunnel.org/stunnel/ SHA-256 hash for stunnel-4.42.tar.gz: d33c407bfc4f58070e818081bd082c38f91cab7691ccbb794da63143c535de3b Best regards, Mike

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stunnel transparent mode
by Julian D. Seifert 18 Aug '11

18 Aug '11

Hi List, I have a little issue trying to get stunnel running for encapsulating an existing service with SSL. We are running a really old legacy ircd service and would like to provide SSL for the users without having to actually hack that into the really old code base. (Yes we could just use another more modern software but let's just say there are "political" reasons as to why this is not an option) For an ircd we need transparency as in "the ircd should think the connection is not coming from localhost") ANYWAY... so I am working with stunnel 4.39 right now. First a question if I understand it correctly how stunnel will work. I have the ircd running on IP1:6667. I created a service section like this. [ircd] accept = 7000 connect = 6667 transparent = source (And applied the iptables/routing related stuff mentioned in the documentation) Should this already work? Will stunnel "manipulate" packets so that the IRCD "sees" connections from the Peers IP's? And will the Answers the ircd sends to the peers get "intercepted" by stunnel so it can "remanipulate" the answers into the SSL connection? If I try it like I get "local_bind (original port): Cannot assign requested address (99) stunnel" and clients get connection abort. Or is this what "transparent = both" is for? With 4.39 I had an issue trying to use "transparent = both". Stunnel always displayed an error message saying "Each service must define two endpoints" (more or less). I got it to compile by commenting out the one line in options.c causing the error... #### snip #### } else { /* standalone mode checks */ if((unsigned int)section->option.accept + (unsigned int)section->option.program + (unsigned int)section->option.remote + (unsigned int)section->option.sni #ifndef USE_WIN32 + (unsigned int)section->option.transparent_dst #endif /* USE_WIN32 */ !=2) { section_error(last_line, section->servname, "Each service must define two endpoints"); return 0; } ### snap ### Commented out the line within the ifndef. Anyway... I hope somebody can clarify for me how stunnel works and what transparent mode is the one I need. (I want to transparently provide the ircd service with connections so it seems they are directly from the peers and not from stunnel(localhost)) regards, Julian Seifert -- I hate mondays...

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