stunnel-users

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3308 discussions

Memory Leak in stunnel 5.31
by Fritz Gschwendner 20 Apr '16

20 Apr '16

Thank you. I tried the new version. Between 10:15 and 10:50 stunnel private bytes grew by ~ 85 MB. Log entries regarding "possible memory leak" look like this at the beginning: 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\asn1\tasn_new.c:179: 71652 allocations 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\asn1\asn1_lib.c:412: 70978 allocations 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\asn1\a_object.c:346: 55283 allocations 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\asn1\a_object.c:315: 55283 allocations 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\asn1\asn1_lib.c:376: 56826 allocations 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\stack\stack.c:162: 13761 allocations 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\stack\stack.c:187: 11448 allocations 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\buffer\buffer.c:118: 11172 allocations 2016.04.20 10:17:01 LOG4[937]: Possible memory leak at .\crypto\asn1\tasn_new.c:342: 10501 allocations ..and later like this: 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\tasn_new.c:179: 182132 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\asn1_lib.c:412: 181243 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\a_object.c:346: 138968 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\a_object.c:315: 138968 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\asn1_lib.c:376: 144407 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\stack\stack.c:162: 35294 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\stack\stack.c:187: 29760 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\buffer\buffer.c:118: 28186 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\tasn_new.c:342: 27649 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\bn\bn_lib.c:303: 27405 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\buffer\buffer.c:74: 18971 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\x_name.c:136: 18967 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\x_name.c:383: 18967 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\a_int.c:208: 18406 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\asn1\a_bitstr.c:158: 18433 allocations 2016.04.20 10:51:04 LOG4[2658]: Possible memory leak at .\crypto\bn\bn_lib.c:272: 13616 allocations If there is anything else I can do, please let me know. -----Ursprüngliche Nachricht----- Von: stunnel-users [mailto:[email protected]] Im Auftrag von Michal Trojnara Gesendet: Dienstag, 19. April 2016 23:31 An: stunnel-users(a)stunnel.org Betreff: Re: [stunnel-users] Memory Leak in stunnel 5.31 On 31.03.2016 22:28, Fritz Gschwendner wrote: > we have a memory leak with stunnel 5.31 in server mode on Windows > Server 2012. Page File Bytes of the stunnel process keep growing. [cut] > I suspect it has something to do with clients not closing the > connection correctly. We have a lot of connections ending like > this: [cut] > Is my suspicion plausible? Can you recommend a change in the > configuration to avoid this issue? Anything else I can do to debug? Your suspicion looks plausible. I have added a heuristic algorithm that identifies excessive memory allocations. Please try stunnel-5.32b2: https://www.stunnel.org/downloads.html The logged warnings should allow identification of the leak source. Best regards, Mike _______________________________________________ stunnel-users mailing list stunnel-users(a)stunnel.org https://www.stunnel.org/cgi-bin/mailman/listinfo/stunnel-users

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Stunnel and Eudora error
by EPPack 14 Apr '16

14 Apr '16

I installed stunnel on one of my laptops a few days ago, and it installed uneventfully. I set up one of my gmail accounts in Eudora per directions I got from another Eudora user, and the account works perfectly in Eudora. However, on this machine, I got an unexpected prompt that showed up in a cmd window during the install, which did NOT show up on the other machine: WARNING: can't open config file: /devel/win32/openssl/openssl.cnf Generating a 2048 bit RSA private key ...+++ ..................+++ Writing new private key to 'C:\Program Files (x86)\stunnel\config\stunnel.pem' ---- You are about to be asked to enter information that will be incorporated into your certificate request. What you are about to enter is what is called a Distinguished Name or a DN. There are quite a few fields but you can leave some blank for some fields there will be a default value, If you enter '.', the field will be left blank. ---- Country Name (2 letter code) [PL]: When I try for an inbound in Eudora, I get the "Error reading from network. Cause: connection aborted due to timeout or other failure (10053). Problem of course is that I'm also unsure if it installed fully/correctly. On the other machine, it installed itself uneventfully as a service, and after I started it (it came in as manual, unstarted), it was fine. This time, tho, it didn't show up in the list of services at all, even tho there was a prompt to start it, which I allowed it to do. That said, I did see it in the start menu, and was able to start it. I also rebooted, and it started up OK. However, after configuring one of my accounts the same way as on the other machine, it's not working, getting the timeout error above. Changed it back to the normal settings for GMail in Eudora, it worked fine, so it wasn't any other cause. I tried adding options = DONT_INSERT_EMPTY_FRAGMENTS to the conf, hopefully in the right place :) and also bumped the Eudora Advanced Network params as also suggested.Nada. The only difference between the two machines, both Windows 7 Pro, is that this one is a 64bit, the other not, which may well be the difference. As I'm new to stunnel, I looked for the manual, but got a 403 on the page. Thoughts? elaine ----- Elaine Pack, Web Analyst, Ivy, VA 99 programming bugs in the code 99 programming bugs Fix one bug, compile it again Now there's 100 bugs in the code! (Repeat until bugs=0)

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developpement hints request
by brahim mohamed 06 Apr '16

06 Apr '16

Hello, My name is Mohamed Aymen, i'm an electronic payment engineer . I recently descovered Stunnel and i'm trying to make some developement and modifications and i need your help with points bellow: 1-steps for compilation on IBM AIX-7 plateform 2-possibility of adding a new source code file(.c) and compiling it with native stunnel files ===some clarifications about source code : 3-i would appreciate if you can indicate me : where exactly in source code i can find the code responsible for accepting buffer from client and the code responsible for accepting buffer (response) from server, also the code responsible for sending data to server and the code responsible for sending server's answer to client (all those on socket mode,on ssl mode and on tls mode) warm regards

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blockscript
by Petr Hojzak 05 Apr '16

05 Apr '16

Hello. Is it possible to setup stunel in a way so it is not detected by services like blocksript? Petr Hojzak https://forpsi-vzr-s126463.mojeid.cz/

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Memory Leak in stunnel 5.31
by Fritz Gschwendner 31 Mar '16

31 Mar '16

Hello, we have a memory leak with stunnel 5.31 in server mode on Windows Server 2012. Page File Bytes of the stunnel process keep growing. The more traffic the faster it's growing, until memory is exhausted and client connects start to fail with: 2016.03.31 15:50:30 LOG3[main]: _beginthread: Exec format error (8) 2016.03.31 15:50:30 LOG3[main]: Connection rejected: create_client failed I suspect it has something to do with clients not closing the connection correctly. We have a lot of connections ending like this: 2016.03.31 09:21:48 LOG3[5156]: SSL_shutdown: Connection reset by peer (WSAECONNRESET) (10054) 2016.03.31 09:21:48 LOG5[5156]: Connection reset: 239 byte(s) sent to SSL, 722 byte(s) sent to socket Is my suspicion plausible? Can you recommend a change in the configuration to avoid this issue? Anything else I can do to debug? The config looks something like this: cert = C:\crt.pem key = C:\key.key ciphers = ALL:!DH:!aNULL:!eNULL:!LOW:!EXP socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 verify = 2 CAfile = C:\All-In-One.pem [test] accept = 23456 connect = 10.10.10.10

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Incoming port ignored
by Ivan De Masi 31 Mar '16

31 Mar '16

Hello, I have a strange problem with my stunnel since a view days: I installed stunnel, because my AV-Scanner (Avira) is not able to scan e-mail traffic of encrypted connections to my mailprovider. So I configured both mail-clients (Thunderbird & Outlook) and AV-Scanner to listen on localhost and stunnel to connect to my mailprovider. This was working fine for a view days, but stoped some days ago and I'm not shure why. Maybe when I installed stunnel as a daemon I run into trouble (will bw another subject). The encrypted connection to my mailprovider is working and e-mails are recived and sent, but the AV-scanner doesn't "see" them anymore. I examined the log and what makes me wonder is, that the when fetching the e-mails, the configured ports (110/143/25) seem to be ignored: "Service [df-pop3s] accepted connection from 127.0.0.1:1878" or "Service [df-pop3s] accepted (FD=472) from 127.0.0.1:1882" The mails on my host are always bypassed on another port (the longer I run stunnel they change/increase) - see the log file. I have installed latest stunnel version (5.31) on Windows 7 (x86). Any ideas? Kind regards, Ivan Main-config: [df-pop3s] client = yes accept = 127.0.0.1:110 connect = sslin.df.eu:995 verify = 3 CAfile = peer-df-pop3s.pem checkHost = sslin.df.eu OCSPaia = yes [df-imaps] client = yes accept = 127.0.0.1:143 connect = sslin.df.eu:993 verify = 3 CAfile = peer-df-imaps.pem checkHost = sslin.df.eu OCSPaia = yes [df-smtps] client = yes accept = 127.0.0.1:25 connect = sslout.df.eu:465 verify = 3 CAfile = peer-df-smtps.pem checkHost = sslout.df.eu OCSPaia = yes Log: 2016.03.30 09:22:21 LOG7[main]: No limit detected for the number of clients 2016.03.30 09:22:21 LOG7[cron]: Cron thread initialized 2016.03.30 09:22:21 LOG5[main]: stunnel 5.31 on x86-pc-msvc-1500 platform 2016.03.30 09:22:21 LOG5[main]: Compiled/running with OpenSSL 1.0.2g-fips 1 Mar 2016 2016.03.30 09:22:21 LOG5[main]: Threading:WIN32 Sockets:SELECT,IPv6 TLS:ENGINE,FIPS,OCSP,PSK,SNI 2016.03.30 09:22:21 LOG7[main]: errno: (*_errno()) 2016.03.30 09:22:21 LOG7[ui]: GUI message loop initialized 2016.03.30 09:22:21 LOG5[main]: Reading configuration from file stunnel.conf 2016.03.30 09:22:21 LOG5[main]: UTF-8 byte order mark detected 2016.03.30 09:22:21 LOG5[main]: FIPS mode enabled 2016.03.30 09:22:21 LOG7[main]: Compression disabled 2016.03.30 09:22:21 LOG7[main]: Snagged 64 random bytes from C:/.rnd 2016.03.30 09:22:21 LOG7[main]: Wrote 0 new random bytes to C:/.rnd 2016.03.30 09:22:21 LOG7[main]: PRNG seeded successfully 2016.03.30 09:22:21 LOG6[main]: Initializing service [df-pop3s] 2016.03.30 09:22:23 LOG7[main]: No certificate or private key specified 2016.03.30 09:22:23 LOG7[main]: SSL options: 0x03000004 (+0x03000000l, -0x00000000) 2016.03.30 09:22:23 LOG6[main]: Initializing service [df-imaps] 2016.03.30 09:22:23 LOG7[main]: No certificate or private key specified 2016.03.30 09:22:23 LOG7[main]: SSL options: 0x03000004 (+0x03000000, -0x00000000) 2016.03.30 09:22:23 LOG6[main]: Initializing service [df-smtps] 2016.03.30 09:22:23 LOG7[main]: No certificate or private key specified 2016.03.30 09:22:23 LOG7[main]: SSL options: 0x03000004 (+0x03000000, -0x00000000) 2016.03.30 09:22:23 LOG5[main]: Configuration successful 2016.03.30 09:22:23 LOG7[main]: Listening file descriptor created (FD=428) 2016.03.30 09:22:23 LOG7[main]: Service [df-pop3s] (FD=428) bound to 127.0.0.1:110 2016.03.30 09:22:23 LOG7[main]: Listening file descriptor created (FD=432) 2016.03.30 09:22:23 LOG7[main]: Service [df-imaps] (FD=432) bound to 127.0.0.1:143 2016.03.30 09:22:23 LOG7[main]: Listening file descriptor created (FD=436) 2016.03.30 09:22:23 LOG7[main]: Service [df-smtps] (FD=436) bound to 127.0.0.1:25 2016.03.30 09:22:42 LOG7[main]: Found 1 ready file descriptor(s) 2016.03.30 09:22:42 LOG7[main]: FD=352 ifds=r-x ofds=--- 2016.03.30 09:22:42 LOG7[main]: FD=428 ifds=r-x ofds=r-- 2016.03.30 09:22:42 LOG7[main]: FD=432 ifds=r-x ofds=--- 2016.03.30 09:22:42 LOG7[main]: Service [df-pop3s] accepted (FD=460) from 127.0.0.1:1878 2016.03.30 09:22:42 LOG7[main]: Creating a new thread 2016.03.30 09:22:42 LOG7[main]: New thread created 2016.03.30 09:22:42 LOG7[0]: Service [df-pop3s] started 2016.03.30 09:22:42 LOG5[0]: Service [df-pop3s] accepted connection from 127.0.0.1:1878 2016.03.30 09:22:42 LOG6[0]: s_connect: connecting 134.119.18.26:995 2016.03.30 09:22:42 LOG7[0]: s_connect: s_poll_wait 134.119.18.26:995: waiting 10 seconds 2016.03.30 09:22:42 LOG5[0]: s_connect: connected 134.119.18.26:995 2016.03.30 09:22:42 LOG5[0]: Service [df-pop3s] connected remote server from 192.168.1.2:1879 2016.03.30 09:22:42 LOG7[0]: Remote descriptor (FD=484) initialized 2016.03.30 09:22:42 LOG6[0]: SNI: sending servername: sslin.df.eu 2016.03.30 09:22:42 LOG7[0]: SSL state (connect): before/connect initialization 2016.03.30 09:22:42 LOG7[0]: SSL state (connect): SSLv2/v3 write client hello A 2016.03.30 09:22:42 LOG7[0]: SSL state (connect): SSLv3 read server hello A 2016.03.30 09:22:42 LOG7[0]: Verification started at depth=2: C=BE, O=GlobalSign nv-sa, OU=Root CA, CN=GlobalSign Root CA 2016.03.30 09:22:42 LOG7[0]: CERT: Pre-verification succeeded 2016.03.30 09:22:42 LOG7[0]: OCSP: Ignoring root certificate 2016.03.30 09:22:42 LOG6[0]: Certificate accepted at depth=2: C=BE, O=GlobalSign nv-sa, OU=Root CA, CN=GlobalSign Root CA 2016.03.30 09:22:42 LOG7[0]: Verification started at depth=1: C=BE, O=GlobalSign nv-sa, CN=AlphaSSL CA - SHA256 - G2 2016.03.30 09:22:42 LOG7[0]: CERT: Pre-verification succeeded 2016.03.30 09:22:42 LOG5[0]: OCSP: Connecting the AIA responder "http://ocsp.globalsign.com/rootr1" 2016.03.30 09:22:46 LOG6[0]: s_connect: connecting 104.16.25.216:80 2016.03.30 09:22:46 LOG7[0]: s_connect: s_poll_wait 104.16.25.216:80: waiting 10 seconds 2016.03.30 09:22:46 LOG5[0]: s_connect: connected 104.16.25.216:80 2016.03.30 09:22:46 LOG7[0]: OCSP: Connected ocsp.globalsign.com:80 2016.03.30 09:22:46 LOG7[0]: OCSP: Response received 2016.03.30 09:22:46 LOG6[0]: OCSP: Status: good 2016.03.30 09:22:46 LOG6[0]: OCSP: This update: Mar 30 05:42:27 2016 GMT 2016.03.30 09:22:46 LOG6[0]: OCSP: Next update: Apr 3 05:42:27 2016 GMT 2016.03.30 09:22:46 LOG5[0]: OCSP: Certificate accepted 2016.03.30 09:22:46 LOG6[0]: Certificate accepted at depth=1: C=BE, O=GlobalSign nv-sa, CN=AlphaSSL CA - SHA256 - G2 2016.03.30 09:22:46 LOG7[0]: Verification started at depth=0: C=DE, OU=Domain Control Validated, CN=sslin.df.eu 2016.03.30 09:22:46 LOG7[0]: CERT: Pre-verification succeeded 2016.03.30 09:22:46 LOG6[0]: CERT: Host name "sslin.df.eu" matched with "sslin.df.eu" 2016.03.30 09:22:46 LOG6[0]: CERT: Locally installed certificate matched 2016.03.30 09:22:46 LOG5[0]: OCSP: Connecting the AIA responder "http://ocsp2.globalsign.com/gsalphasha2g2" 2016.03.30 09:22:46 LOG6[0]: s_connect: connecting 104.16.25.216:80 2016.03.30 09:22:46 LOG7[0]: s_connect: s_poll_wait 104.16.25.216:80: waiting 10 seconds 2016.03.30 09:22:46 LOG5[0]: s_connect: connected 104.16.25.216:80 2016.03.30 09:22:46 LOG7[0]: OCSP: Connected ocsp2.globalsign.com:80 2016.03.30 09:22:46 LOG7[0]: OCSP: Response received 2016.03.30 09:22:46 LOG6[0]: OCSP: Status: good 2016.03.30 09:22:46 LOG6[0]: OCSP: This update: Mar 27 21:09:59 2016 GMT 2016.03.30 09:22:46 LOG6[0]: OCSP: Next update: Mar 31 21:09:59 2016 GMT 2016.03.30 09:22:46 LOG5[0]: OCSP: Certificate accepted 2016.03.30 09:22:46 LOG5[0]: Certificate accepted at depth=0: C=DE, OU=Domain Control Validated, CN=sslin.df.eu 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 read server certificate A 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 read server key exchange A 2016.03.30 09:22:46 LOG6[0]: Client certificate not requested 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 read server done A 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 write client key exchange A 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 write change cipher spec A 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 write finished A 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 flush data 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 read server session ticket A 2016.03.30 09:22:46 LOG7[0]: SSL state (connect): SSLv3 read finished A 2016.03.30 09:22:46 LOG7[0]: 1 client connect(s) requested 2016.03.30 09:22:46 LOG7[0]: 1 client connect(s) succeeded 2016.03.30 09:22:46 LOG7[0]: 0 client renegotiation(s) requested 2016.03.30 09:22:46 LOG7[0]: 0 session reuse(s) 2016.03.30 09:22:46 LOG6[0]: SSL connected: new session negotiated 2016.03.30 09:22:46 LOG7[0]: Peer certificate was cached (4539 bytes) 2016.03.30 09:22:46 LOG6[0]: Negotiated TLSv1.2 ciphersuite ECDHE-RSA-AES128-GCM-SHA256 (128-bit encryption) 2016.03.30 09:22:46 LOG7[0]: Compression: null, expansion: null 2016.03.30 09:23:01 LOG7[0]: SSL alert (read): warning: close notify 2016.03.30 09:23:01 LOG6[0]: SSL closed (SSL_read) 2016.03.30 09:23:01 LOG7[0]: Sent socket write shutdown 2016.03.30 09:23:01 LOG6[0]: Read socket closed (readsocket) 2016.03.30 09:23:01 LOG7[0]: Sending close_notify alert 2016.03.30 09:23:01 LOG7[0]: SSL alert (write): warning: close notify 2016.03.30 09:23:01 LOG6[0]: SSL_shutdown successfully sent close_notify alert 2016.03.30 09:23:01 LOG5[0]: Connection closed: 304 byte(s) sent to SSL, 545297 byte(s) sent to socket 2016.03.30 09:23:01 LOG7[0]: Remote descriptor (FD=484) closed 2016.03.30 09:23:01 LOG7[0]: Local descriptor (FD=460) closed 2016.03.30 09:23:01 LOG7[0]: Service [df-pop3s] finished (0 left) 2016.03.30 09:23:02 LOG7[main]: Found 1 ready file descriptor(s) 2016.03.30 09:23:02 LOG7[main]: FD=352 ifds=r-x ofds=--- 2016.03.30 09:23:02 LOG7[main]: FD=428 ifds=r-x ofds=r-- 2016.03.30 09:23:02 LOG7[main]: FD=432 ifds=r-x ofds=--- 2016.03.30 09:23:02 LOG7[main]: Service [df-pop3s] accepted (FD=472) from 127.0.0.1:1882 2016.03.30 09:23:02 LOG7[main]: Creating a new thread 2016.03.30 09:23:02 LOG7[main]: New thread created 2016.03.30 09:23:02 LOG7[1]: Service [df-pop3s] started 2016.03.30 09:23:02 LOG5[1]: Service [df-pop3s] accepted connection from 127.0.0.1:1882 2016.03.30 09:23:02 LOG6[1]: s_connect: connecting 134.119.18.26:995 2016.03.30 09:23:02 LOG7[1]: s_connect: s_poll_wait 134.119.18.26:995: waiting 10 seconds 2016.03.30 09:23:02 LOG5[1]: s_connect: connected 134.119.18.26:995 2016.03.30 09:23:02 LOG5[1]: Service [df-pop3s] connected remote server from 192.168.1.2:1883 2016.03.30 09:23:02 LOG7[1]: Remote descriptor (FD=468) initialized 2016.03.30 09:23:02 LOG6[1]: SNI: sending servername: sslin.df.eu 2016.03.30 09:23:02 LOG7[1]: SSL state (connect): before/connect initialization 2016.03.30 09:23:02 LOG7[1]: SSL state (connect): SSLv3 write client hello A 2016.03.30 09:23:02 LOG7[1]: SSL state (connect): SSLv3 read server hello A 2016.03.30 09:23:02 LOG7[1]: SSL state (connect): SSLv3 read finished A 2016.03.30 09:23:02 LOG7[1]: SSL state (connect): SSLv3 write change cipher spec A 2016.03.30 09:23:02 LOG7[1]: SSL state (connect): SSLv3 write finished A 2016.03.30 09:23:02 LOG7[1]: SSL state (connect): SSLv3 flush data 2016.03.30 09:23:02 LOG7[1]: 2 client connect(s) requested 2016.03.30 09:23:02 LOG7[1]: 2 client connect(s) succeeded 2016.03.30 09:23:02 LOG7[1]: 0 client renegotiation(s) requested 2016.03.30 09:23:02 LOG7[1]: 1 session reuse(s) 2016.03.30 09:23:02 LOG6[1]: SSL connected: previous session reused 2016.03.30 09:23:08 LOG7[1]: SSL alert (read): warning: close notify 2016.03.30 09:23:08 LOG6[1]: SSL closed (SSL_read) 2016.03.30 09:23:08 LOG7[1]: Sent socket write shutdown 2016.03.30 09:23:08 LOG6[1]: Read socket closed (readsocket) 2016.03.30 09:23:08 LOG7[1]: Sending close_notify alert 2016.03.30 09:23:08 LOG7[1]: SSL alert (write): warning: close notify 2016.03.30 09:23:08 LOG6[1]: SSL_shutdown successfully sent close_notify alert 2016.03.30 09:23:08 LOG5[1]: Connection closed: 149 byte(s) sent to SSL, 336471 byte(s) sent to socket 2016.03.30 09:23:08 LOG7[1]: Remote descriptor (FD=468) closed 2016.03.30 09:23:08 LOG7[1]: Local descriptor (FD=472) closed 2016.03.30 09:23:08 LOG7[1]: Service [df-pop3s] finished (0 left) 2016.03.30 09:23:21 LOG6[cron]: Executing cron jobs 2016.03.30 09:23:21 LOG6[cron]: Cron jobs completed in 0 seconds 2016.03.30 09:23:21 LOG7[cron]: Waiting 86400 seconds

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Re: [stunnel-users] Connecting stunnels
by Ludolf Holzheid 31 Mar '16

31 Mar '16

On Thu, 2016-03-31 09:39:49 -0400, Carter Browne wrote: > A single instance of stunnel can be a server or a client depending on > the settings. For this configuration, you would want host3 to be a > server not a client. > Thus, you need the intermediate port on server2 to server as both a > client and a server: > > In your configuration files you would need: > > Host1: > [secure_telnet] > accept = local:23 > connect = host2:host2port1 > client = yes > > Host2: > [incoming_telnet_relay] > accept = host2:host2port1 > connect = local:host2port2 > client = no > > [outgoing_telnet_relay] > accept =local:host2port2 > connect = host3:host3port1 > client = yes > > Host3: > [incoming_telnet] > accept = host3:host3port1 > connect = local:23 Carter, What's the advantage of this setup over a direct connection from Host1 to Host3? Host1: [secure_telnet] accept = local:23 connect = host3:host3port1 client = yes Host3: [incoming_telnet] accept = host3:host3port1 connect = local:23 client = no If e.g. Host3 isn't directly reachable from Host1, a simple port forwarding (without decryption and re-encryption) on Host2 would suffice. Ludolf -- Ludolf Holzheid Bihl+Wiedemann GmbH Floßwörthstraße 41 68199 Mannheim, Germany Tel: +49 621 33996-0 Fax: +49 621 3392239 mailto:[email protected] http://www.bihl-wiedemann.de Sitz der Gesellschaft: Mannheim Geschäftsführer: Jochen Bihl, Bernhard Wiedemann Amtsgericht Mannheim, HRB 5796

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Connecting stunnels
by Juhasz Gabor 31 Mar '16

31 Mar '16

Hi, I am newbie in stunnel world so sorry for my question if it was already answered earlier. I have the following task to solve somehow : We have 1 server with 2 stunnel connections (any kind). We have e.g. http communicatoin via tunnels. Is there any support in stunnel to connect them somehow. Probably we do not need bidirectional communication. [client1]----- stunnel 1---> [server]------stunnel2 ----->[client2] So [client1] --> [client2] If there is no support in stunnel do you have any idea how to do it? Kind regards, Gabor

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Please help
by Steve Wollan 30 Mar '16

30 Mar '16

Installed stunnel-5.31 (stunnel-5.31-installer) so that I can get MT4, a Forex trade platform, to send me mails to my Gmail account. I was told this was necessary because MT4 doesn't support SSL Authentication. I attempted to start and received this; [image: Inline image 1] It looks like a config file issue but also would not bind? Is this one issue? I was told all I needed to do with the config file is this; [image: Inline image 2] Can you please simply help me with the config file? I'm lost and need help. Thanks to all in advance for your help.

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Using stunnel for TLS with Geotrust cert?
by Jon Bogaty 28 Mar '16

28 Mar '16

Hey stunnel-users, I'm having an issue both on stunnel4 and on 5 which I think is more related to a lack of understanding of the difference between how stunnel uses intermediate chain certs and root CA certs. I have from Geotrust, who signs my SSL certs, an intermediate.crt which by the stunnel docs should be catted into one stunnel.pem with the cert for my domain and the private key. The issue is when I setup everything on the server and try to connect with a client I either get for "verify 2" warnings about MiTM authentication problems, or for "verify 3" or "verify 4", which should disable CA checking altogether to my understanding, "Please specify CApath". I feel like I'm missing something critical in terms of pieces. The goal is to use stunnel as a proxy for mysql and the conf is pretty barebones: sslVersion = TLSv1 setuid = stunnel4 setgid = stunnel4 pid = /var/lib/stunnel4/stunnel4.pid debug = 7 foreground = yes socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 cert = /etc/stunnel/stunnel.pem verify = 3 [mysqls] accept = 3307 connect = localhost:3306 It runs just fine using supervisor. Any thoughts and how I could make the handshake work between server and client using geotrust's intermediate crt as the CA cert, or something similar? It contains certs down to the root level. Thanks! Jon

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