- stunnel-users - stunnel.org

CN field of server cert
by spambox＠poczta.onet.pl 16 May '05

16 May '05

Hi stunnel-users, There is example configuration:  I don't know how to enforce stunnel to verify CN field from server provided certificate. Even if i change "connect" field to next one stunnel will not complain. So, am I wrong that when someone hijack (mitm) this connection and provide any server cert signed by ThawteServerCA then I loose? Please add this verification to stunnel when verify is set to 2 or better as an separate option "verify_cn?" which could be used in service-level context. Usting this option with that described below I can drop 'verify' and 'CAfile' at all and feel much better. :) There is another verification method that could be added - not related to verify option. In most cases I know public cert of remote server. So I also know sha1/md5 fingerprint of that cert. Security could improve v.much by just adding these lines to my example configuration: fingerprint_md5=F5:BD:C3:C8:D5:4B:03:EA:57:BB:81:72:46:6B:26:54 fingerprint_sha1=CE:3A:0D:3E:DA:4B:77:A3:53:C0:9E:A8:65:B7:F8:C2:09:71:43:41 Another good service-level option? There are some other good options that could be ported from openssl/s_client: "-ssl2, -ssl3, -tls1, -no_ssl2, -no_ssl3, -no_tls1" Regards.

3 3

unexpected shutdown of stunnel
by Daniel Graupner 15 May '05

15 May '05

Hello, I use Freebsd and made an update from stunnel 4.8 to stunnel 4.10 from the ports today. Now I noticed that stunnel stops after a while. Here is my conf: chroot = /usr/local/stunnel pid = /stunnel.pid setuid = stunnel setgid = stunnel debug = 7 output = /usr/local/stunnel/stunnel.log client = yes [https] accept = localhost:9999 connect = <ssl-apache>:443 TIMEOUTclose = 0 And these are the last lines of the log:005.05.15 10:34:00 LOG7[60990:0]: Waiting 0 second(s) for 3 file descriptor(s) 2005.05.15 10:34:00 LOG7[60990:0]: CONTEXT 1, FD=4, (IN)->() 2005.05.15 10:34:00 LOG7[60990:0]: CONTEXT 1, FD=6, (IN)->() 2005.05.15 10:34:00 LOG7[60990:0]: CONTEXT 3, FD=8, (INOUT)->(OUT) 2005.05.15 10:34:00 LOG7[60990:3]: SSL alert (write): warning: close notify 2005.05.15 10:34:00 LOG7[60990:3]: SSL_shutdown retrying 2005.05.15 10:34:00 LOG7[60990:3]: SSL doesn't need to read or write 2005.05.15 10:34:00 LOG7[60990:0]: Waiting 0 second(s) for 3 file descriptor(s) 2005.05.15 10:34:00 LOG7[60990:0]: CONTEXT 1, FD=4, (IN)->() 2005.05.15 10:34:00 LOG7[60990:0]: CONTEXT 1, FD=6, (IN)->() 2005.05.15 10:34:00 LOG7[60990:0]: CONTEXT 3, FD=8, (IN)->(IN) 2005.05.15 10:34:00 LOG7[60990:3]: SSL alert (read): warning: close notify 2005.05.15 10:34:00 LOG7[60990:3]: SSL closed on SSL_read 2005.05.15 10:34:00 LOG7[60990:3]: Socket write shutdown 2005.05.15 10:34:00 LOG5[60990:3]: Connection closed: 197 bytes sent to SSL, 784 bytes sent to socket 2005.05.15 10:34:00 LOG7[60990:3]: https finished (0 left) 2005.05.15 10:34:00 LOG7[60990:3]: removing pid file /stunnel.pid Everything went fine with 4.8, now stunnel is not running anymore after a short period of time (few minutes). Regards, Daniel.

1 0

Problems with stunnel 4.10 compilation
by Oleg Ivanov 14 May '05

14 May '05

Hello. I've compiled stunnel 4.10 without any problems on my Gentoo workstation and RedHat server. But now I need to install it into my old legacy Mandrake 8.2 server and here I've got into troubles. I've updated zlib and openssl (configuring it with "zlib" option) to their latest versions, then tried to make stunnel and got following errors: --- /usr/lib/libcrypto.a(c_zlib.o): In function `zlib_compress_block': c_zlib.o(.text+0x48): undefined reference to `compress' /usr/lib/libcrypto.a(c_zlib.o): In function `zz_uncompress': c_zlib.o(.text+0x145): undefined reference to `inflateInit_' c_zlib.o(.text+0x159): undefined reference to `inflate' c_zlib.o(.text+0x16c): undefined reference to `inflateEnd' c_zlib.o(.text+0x18b): undefined reference to `inflateEnd' collect2: ld returned 1 exit status make[1]: *** [stunnel] Error 1 make: *** [all-recursive] Error 1 --- It seems like problems with zlib so I've double-checked it - but zlib 1.2.2 is really installed. If I recompile openssl without "zlib" option then I can make stunnel but it can't initialize zlib compression algorithm that I really need. And if I compile openssl with zlib - stunnel fails on make with errors. Can anyone help with it please? I really stuck 8( PS: My system's parameters according to support page requirements: # uname -a Linux localhost 2.4.27-vs1.29 #2 SMP Tue Oct 5 15:51:37 CDT 2004 i686 unknown glibc version: 2.2.4 # gcc -v Reading specs from /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/specs gcc version 2.96 20000731 (Mandrake Linux 8.2 2.96-0.76mdk) # openssl version OpenSSL 0.9.7g 11 Apr 2005 Best Regards, Oleg Ivanov. -- Oleg Ivanov mailto: saruman(a)unigsm.com

1 1

Connection details patch for 4.10
by Oleg Ivanov 14 May '05

14 May '05

Hello. I've modified the old "conndetails_peter" patch by Peter D. Gray to let it work with stunnel 4.10. I've also added to it information about compression (available compression methods and negotiated method). Patch creates a file "conn.LOCAL_HOST:LOCAL_PORT" in a configurable temp directory (config file: "infodir" option). The file is deleted when the client disconnects. Full description of original can be found at: http://www.stunnel.org/patches/desc/conndetails_peter.html Hope it will be useful for someone. Best Regards, Oleg Ivanov. -- Oleg Ivanov mailto: saruman(a)unigsm.com diff -cr ../stunnel-4.10.orig/src/client.c src/client.c *** ../stunnel-4.10.orig/src/client.c 2005-05-13 00:43:24.000000000 -0200 --- src/client.c 2005-05-13 01:34:36.000000000 -0200 *************** *** 94,99 **** --- 94,114 ---- c->opt=opt; c->local_rfd.fd=rfd; c->local_wfd.fd=wfd; + + if(options.info_dir) { + sprintf(c->info_fname, "%s/pid.%d", options.info_dir, getpid()); + c->info_file = fopen(c->info_fname, "w"); + if(!c->info_file) { + s_log(LOG_ERR, "failed to create: %s (continuing)", c->info_fname); + c->info_fname[0] = 0; + } else { + s_log(LOG_DEBUG, "connection detail to be written to: %s", + c->info_fname); + fprintf(c->info_file, "# connection details\n" + "STUNNEL_PID=%d\n", getpid()); + } + } + return c; } *************** *** 203,208 **** --- 218,228 ---- s_log(LOG_NOTICE, "%s connected from %s", c->opt->servname, c->accepting_address); } + if(c->info_file) { + fprintf(c->info_file, "SERVICE=\"%s\"\n", c->opt->servname); + fprintf(c->info_file, "REMOTE_HOST=\"%s\"\nREMOTE_PORT=%d\n", + c->accepting_address, ntohs(c->peer_addr.addr[0].in.sin_port)); + } return 0; /* OK */ } *************** *** 237,242 **** --- 257,289 ---- } #endif s_log(LOG_DEBUG, "Remote FD=%d initialized", fd); + if(c->info_file) { + struct sockaddr_in addr; + int addrlen = sizeof(addr); + if(getsockname(fd, (struct sockaddr *)&addr, &addrlen)) { + // ignore error + } else { + char newname[STRLEN]; + + /* record our end of the tunnel, and change name of file to match */ + enter_critical_section(CRIT_NTOA); /* inet_ntoa is not mt-safe */ + fprintf(c->info_file, "LOCAL_HOST=\"%s\"\nLOCAL_PORT=%d\n", + inet_ntoa(addr.sin_addr), ntohs(addr.sin_port)); + sprintf(newname, "%s/conn.%s:%d", + options.info_dir, + inet_ntoa(addr.sin_addr), ntohs(addr.sin_port)); + leave_critical_section(CRIT_NTOA); + + /* done with file, close it now */ + fprintf(c->info_file, "# EOF\n"); + fclose(c->info_file); + c->info_file = NULL; + + /* rename so it's easy for the client to find */ + rename(c->info_fname, newname); + strcpy(c->info_fname, newname); + } + } c->remote_fd.fd=fd; c->remote_fd.is_socket=1; /* Always! */ if(set_socket_options(fd, 2)<0) *************** *** 674,679 **** --- 721,737 ---- reset(c->local_wfd.fd, "linger (local_wfd)"); } } + /* Cleanup connection info file which isn't useful anymore */ + if(options.info_dir) { + if(c->info_file) { + fclose(c->info_file); + c->info_file = NULL; + } + if(c->info_fname) { + unlink(c->info_fname); /* ignore errors */ + s_log(LOG_INFO, "removed info file: %s", c->info_fname); + } + } } static void print_cipher(CLI *c) { /* print negotiated cipher */ *************** *** 683,689 **** #else SSL_CIPHER *cipher; char buf[STRLEN]; ! int len; cipher=SSL_get_current_cipher(c->ssl); SSL_CIPHER_description(cipher, buf, STRLEN); --- 741,748 ---- #else SSL_CIPHER *cipher; char buf[STRLEN]; ! int len, cnt; ! SSL_COMP *comp=NULL; cipher=SSL_get_current_cipher(c->ssl); SSL_CIPHER_description(cipher, buf, STRLEN); *************** *** 691,696 **** --- 750,809 ---- if(len>0) buf[len-1]='\0'; s_log(LOG_INFO, "Negotiated ciphers: %s", buf); + + if(c->info_file) { + X509 *peer; + + fprintf(c->info_file, "CIPHER_DESC=\"%s\"\n", buf); + fprintf(c->info_file, "CIPHER_ALGO=\"%s\"\n", + SSL_CIPHER_get_name(cipher)); + fprintf(c->info_file, "CIPHER_BITS=%d\n", + SSL_CIPHER_get_bits(cipher, NULL)); + // Show compression info + if (c->ssl->ctx->comp_methods == NULL) { + // No compression methods available + fprintf(c->info_file, "No compression methods available\n"); + } else { + int cntMethods = sk_SSL_COMP_num(c->ssl->ctx->comp_methods); + fprintf(c->info_file, "%d compression method(s) available:\n", cntMethods); + for (cnt=0; cnt<cntMethods; cnt++) { + comp=sk_SSL_COMP_value(c->ssl->ctx->comp_methods, cnt); + fprintf(c->info_file, "%d\t%s ", comp->id, comp->name); + switch (comp->id) { + case 0xe0: + fprintf(c->info_file, "(zlib)\n"); break; + case 0xe1: + fprintf(c->info_file, "(rle)\n"); break; + default: + fprintf(c->info_file, "(unknown)\n"); break; + } + } + } + if (c->ssl->s3->tmp.new_compression == NULL) { + fprintf(c->info_file, "SSL_COMP=NULL\n"); + } else { + fprintf(c->info_file, "SSL_COMP.id=%d ", + c->ssl->s3->tmp.new_compression->id); + switch (comp->id) { + case 0xe0: + fprintf(c->info_file, "(zlib)\n"); break; + case 0xe1: + fprintf(c->info_file, "(rle)\n"); break; + default: + fprintf(c->info_file, "(unknown)\n"); break; + } + } + peer = SSL_get_peer_certificate(c->ssl); + if(peer) { + X509_NAME_oneline(X509_get_subject_name(peer), buf, STRLEN); + fprintf(c->info_file, "SSL_CLIENT_DN=\"%s\"\n", buf); + + X509_NAME_oneline(X509_get_issuer_name(peer), buf, STRLEN); + fprintf(c->info_file, "SSL_CLIENT_I_DN=\"%s\"\n", buf); + + X509_free(peer); + } + } #endif } *************** *** 953,958 **** --- 1066,1075 ---- s_ntop(c->connecting_address, &addr); s_log(LOG_DEBUG, "%s connecting %s", c->opt->servname, c->connecting_address); + if(c->info_file) { + fprintf(c->info_file, "TUNNEL_HOST=\"%s\"\nTUNNEL_PORT=%d\n", + c->connecting_address, ntohs(addr.in.sin_port)); + } if(!connect(s, &addr.sa, addr_len(addr))) return s; /* no error -> success (should not be possible) */ error=get_last_socket_error(); Only in src: client.c.orig Only in src: client.c~ diff -cr ../stunnel-4.10.orig/src/options.c src/options.c *** ../stunnel-4.10.orig/src/options.c 2005-05-13 00:43:24.000000000 -0200 --- src/options.c 2005-05-13 00:44:16.000000000 -0200 *************** *** 664,669 **** --- 664,693 ---- break; } + /* infodir */ + switch(cmd) { + case CMD_INIT: + options.info_dir=NULL; + break; + case CMD_EXEC: + if(strcasecmp(opt, "infodir")) + break; + if(arg[0]) { /* not empty */ + if(strlen(arg) > STRLEN - 20) return "infodir pathname too long"; + options.info_dir=stralloc(arg); + } else { + options.info_dir=NULL; + } + return NULL; /* OK */ + case CMD_DEFAULT: + break; + case CMD_HELP: + log_raw("%-15s = writable directory to store connection info into", + "infodir"); + break; + } + + if(cmd==CMD_EXEC) return option_not_found; return NULL; /* OK */ diff -cr ../stunnel-4.10.orig/src/prototypes.h src/prototypes.h *** ../stunnel-4.10.orig/src/prototypes.h 2005-05-13 00:43:24.000000000 -0200 --- src/prototypes.h 2005-05-13 00:47:03.000000000 -0200 *************** *** 113,118 **** --- 113,119 ---- int verify_level; int verify_use_only_my; long ssl_options; + char *info_dir; /* directory for connection info */ /* some global data for stunnel.c */ #ifndef USE_WIN32 *************** *** 264,269 **** --- 265,272 ---- FD *ssl_rfd, *ssl_wfd; /* Read and write SSL descriptors */ int sock_bytes, ssl_bytes; /* Bytes written to socket and ssl */ s_poll_set fds; /* File descriptors */ + FILE *info_file; /* text file with connection information */ + char info_fname[STRLEN]; /* file name (full path) for info_file */ } CLI; extern int max_clients; *************** *** 305,311 **** /**************************************** Prototypes for sthreads.c */ typedef enum { ! CRIT_KEYGEN, CRIT_INET, CRIT_CLIENTS, CRIT_WIN_LOG, CRIT_SESSION, CRIT_SECTIONS } SECTION_CODE; --- 308,314 ---- /**************************************** Prototypes for sthreads.c */ typedef enum { ! CRIT_KEYGEN, CRIT_INET, CRIT_CLIENTS, CRIT_WIN_LOG, CRIT_SESSION, CRIT_NTOA, CRIT_SECTIONS } SECTION_CODE;

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syslog on Solaris2.9
by Geoff LeBoldus 13 May '05

13 May '05

I can't seem to get stunnel-4.10 to log properly to syslog. Stunnel logs the startup, but doesn't log any individual tunnel information. If I specify its own file and debug = 7, it logs everything as expected. I've tried a number of different configuration combinations without success. Any thoughts? Here's my current config snippets - stunnel.conf debug = local0.debug -syslog.conf local0.debug /var/log/syslog Stunnel startup from /var/log/syslog May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.notice] stunnel 4.10 on sparc-sun-solaris2.9 UCONTEXT+POLL+IPv4 with OpenSSL 0.9.7f 22 Mar 2005 May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.notice] stunnel 4.10 on sparc-sun-solaris2.9 UCONTEXT+POLL+IPv4 with OpenSSL 0.9.7f 22 Mar 2005 May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] Snagged 64 random bytes from /home/geoff/.rnd May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] Wrote 1024 new random bytes to /home/geoff/.rnd May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] RAND_status claims sufficient entropy for the PRNG May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.info] PRNG seeded successfully May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] Certificate: /opt/local/etc/stunnel/stunnel.pem May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] Key file: /opt/local/etc/stunnel/stunnel.pem May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.info] file ulimit = 1024 (can be changed with 'ulimit -n') May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.info] poll() used - no FD_SETSIZE limit for file descriptors May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.notice] 500 clients allowed May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.notice] 500 clients allowed May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] FD 5 in non-blocking mode May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] FD 6 in non-blocking mode May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] FD 7 in non-blocking mode May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] SO_REUSEADDR option set on accept socket May 13 15:31:31 server_name stunnel[4576]: [ID 702911 local0.debug] ldaps bound to 0.0.0.0:1212 May 13 15:31:31 server_name stunnel[4577]: [ID 702911 local0.debug] Created pid file /stunnel.pid May 13 15:31:31 server_name stunnel[4577]: [ID 702911 local0.debug] Waiting -1 second(s) for 2 file descriptor(s) -- Geoff LeBoldus Systems Programmer Information Technology Services

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Session Reuse Information for Stunnel
by vasudha.upadhyaya＠convergys.com 11 May '05

11 May '05

I know that Stunnel reuses sessions. Can anyone tell me the default time that stunnel reuses the old session. And to set a value for session timeout do I use the option: session = timeout session cache timeout Thanks, Vasudha. -------------------------------------------- Vasudha Upadhyaya Convergys Speech Solutions Ph:703-885-5837 vasudha.upadhyaya(a)convergys.com -- "NOTICE: The information contained in this electronic mail transmission is intended by Convergys Corporation for the use of the named individual or entity to which it is directed and may contain information that is privileged or otherwise confidential. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email or by telephone (collect), so that the sender's address records can be corrected."

2 1

zlib compression
by Oleg Ivanov 09 May '05

09 May '05

Hello. I have installed stunnel 4.09 both as client (on my computer) and as server (on server). Both has zlib compression enabled and I can see that zlib initializes properly in the logs (it says "Compression enabled using zlib method"). But when I send any data over that tunnel I can't see any signs of compression - amount of traffic is almost the same as over plain connection. Am I doing something wrong? Or I'm misunderstanding the purpose of this compression ability? And if the traffic indeed must be reduced - why I can't see that and how can I make it work properly? Thank you for your answers. Best Regards, Oleg Ivanov. -- Oleg Ivanov mailto: saruman(a)unigsm.com

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connect ip = accept ip on multihomed server ?
by Dennis Spreen 09 May '05

09 May '05

hi all, with a configuration (stunnel4.10) like this [conc1] accept = 100 connect = 99 stunnel accepts all requests on all ips on port 100 but connects with the localhost to port 99. is it possible to configure stunnel that if it accepts a connection on 1.2.3.4:100 it connects to 1.2.3.4:99 ? I know it is possible to use accept = 1.2.3.4:100 connect = 1.2.3.4:99 .... accept = 1.2.3.250:100 connect = 1.2.3.250:99 but i'm on a c-class and that would require about 250 entries in the config file. Is there a better way to do this? regards dennis

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Problems in Stunnel4.10
by vasudha.upadhyaya＠convergys.com 06 May '05

06 May '05

Hi, We have been using stunnel 4.05 and recently downloded the stunnel 4.10 and deployed in our environmrnt. All the traffice is going via the Load Balancer Cisco CSS with SSL Module to the unix server(with stunnel4.10 on them). We also 4.10 deployed on the Windows2000 as a client. The CSS sends keep Alives to check the health of the servers(whether they are up or not).And I guess due to this the stunnel on unix servers crashes immediately and there is a access violation error. Attached is the truss output for one of the unix servers.Stunnel4.10 was compiled using OpenSSL0.97d and OpenSSL0.97g, and still we get the same problem.Attached is the stunnel.conf also.[attachment "stunnel.conf" deleted by Vasudha Upadhyaya/CCMG/CVG] (See attached file: truss.out) (See attached file: stunnel.conf) Thanks, Vasudha. -------------------------------------------- Vasudha Upadhyaya Convergys Speech Solutions Ph:703-885-5837 vasudha.upadhyaya(a)convergys.com -- "NOTICE: The information contained in this electronic mail transmission is intended by Convergys Corporation for the use of the named individual or entity to which it is directed and may contain information that is privileged or otherwise confidential. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email or by telephone (collect), so that the sender's address records can be corrected."

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qmail+tcpserver+stunnel-4.x
by Scott Geiger 06 May '05

06 May '05

Does anyone have a good link to setting up qmail to use stunnel for pop3s? I have found a few, but so far nothing seems to work from me. When I test with telnet it closes the connection immediately and tcpserver exits with status 11. tcpserver: status: 0/20 tcpserver: status: 1/20 tcpserver: pid 32660 from 128.226.61.66 tcpserver: ok 32660 242.70-84-9.reverse.theplanet.com:70.84.9.242:995 :128.226.61.66::26733 2005.05.06 15:37:18 LOG5[32660:1]: stunnel 4.10 on i686-pc-linux-gnu UCONTEXT+POLL+IPv4+LIBWRAP with OpenSSL 0.9.7g 11 Apr 2005 2005.05.06 15:37:18 LOG7[32660:1]: Snagged 64 random bytes from /root/.rnd 2005.05.06 15:37:18 LOG7[32660:1]: Wrote 1024 new random bytes to /root/.rnd 2005.05.06 15:37:18 LOG7[32660:1]: RAND_status claims sufficient entropy for the PRNG 2005.05.06 15:37:18 LOG6[32660:1]: PRNG seeded successfully 2005.05.06 15:37:18 LOG7[32660:1]: Configuration SSL options: 0x01000000 2005.05.06 15:37:18 LOG7[32660:1]: SSL options set: 0x01000000 2005.05.06 15:37:18 LOG7[32660:1]: Certificate: /etc/stunnel/stunnel.pem 2005.05.06 15:37:18 LOG7[32660:1]: Key file: /etc/stunnel/stunnel.pem 2005.05.06 15:37:18 LOG7[32660:1]: stunnel started 2005.05.06 15:37:18 LOG7[32660:1]: FD 0 in non-blocking mode 2005.05.06 15:37:18 LOG7[32660:1]: FD 1 in non-blocking mode 2005.05.06 15:37:18 LOG6[32660:1]: Local mode child started (PID=32661) 2005.05.06 15:37:18 LOG5[32660:1]: stunnel connected from 127.0.0.1:41860 2005.05.06 15:37:18 LOG7[32660:1]: FD 3 in non-blocking mode 2005.05.06 15:37:18 LOG7[32660:1]: stunnel connecting 127.0.0.1:110 2005.05.06 15:37:18 LOG7[32660:1]: connect_wait: waiting 10 seconds 2005.05.06 15:37:18 LOG7[32660:0]: Waiting 10 second(s) for 1 file descriptor(s) tcpserver: end 32660 status 11 tcpserver: status: 0/20 If is use openssl's s_client (openssl s_client -connect mail.bcmediagroup.com:995 -state) I get: CONNECTED(00000003) SSL_connect:before/connect initialization SSL_connect:SSLv2/v3 write client hello A SSL_connect:error in SSLv2/v3 read server hello A write:errno=104 Scott Geiger

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Newbie windows user needs help patching/compiling with mingw
by Geoff Elmer 04 May '05

04 May '05

Can anyone point me to some documentation on how to use mingw to patch and make stunnel? Specifically, I want to apply connect-proxy_dunbar.patch to v4.05 source and compile it. As I am not really a coder (yet) and am not yet very *nix knowledgeable, any help would be much appreciated. Situation is: I am trying to traverse a MS ISA server (running as a proxy) and the v4.10 stunnel doesn't allow me to specify a proxy to route thru. Thanks in advance, Geoff __________________________________ Do you Yahoo!? Yahoo! Mail - Find what you need with new enhanced search. http://info.mail.yahoo.com/mail_250

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[Newbie] Set up question
by Geoff Sheridan 02 May '05

02 May '05

I have compiled and installed stunnel 4.10 under Mac OS X 10.3. I want to set up stunnel to connect a non-ssl newsreader client to an ssl nntp server. The newsreader client is Unison and the server is Easynews SSL server. I don't really know how to do this. I wonder if anyone can point me in the right direction. Thanks Geoff ___________ PS I did various searches of the list archive and read TFM, but still need guidance! I am asked to include some details: $ /usr/local/sbin/stunnel -version stunnel 4.10 on powerpc-apple-darwin7.7.0 PTHREAD+POLL+IPv4+LIBWRAP with OpenSSL 0.9.7b 10 Apr 2003 Global options cert = /usr/local/etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH debug = 5 key = /usr/local/etc/stunnel/stunnel.pem pid = /usr/local/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 TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds $ uname -a Darwin My-Computer.local 7.7.0 Darwin Kernel Version 7.7.0: Sun Nov 7 16:06:51 PST 2004; root:xnu/xnu-517.9.5.obj~1/RELEASE_PPC Power Macintosh powerpc $ gcc -v Reading specs from /usr/libexec/gcc/darwin/ppc/3.3/specs Thread model: posix gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)

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[Newbie] Set up question
by retrocool 30 Apr '05

30 Apr '05

I have compiled and installed stunnel 4.10 under Mac OS X 10.3. I want to set up stunnel to connect a non-ssl newsreader client to an ssl nntp server. The newsreader client is Unison and the server is Easynews SSL server. I don't really know how to do this. I wonder if anyone can point me in the right direction. Thanks Geoff ___________ PS I did various searches of the list archive and read TFM, but still need guidance! I am asked to include some details: $ /usr/local/sbin/stunnel -version stunnel 4.10 on powerpc-apple-darwin7.7.0 PTHREAD+POLL+IPv4+LIBWRAP with OpenSSL 0.9.7b 10 Apr 2003 Global options cert = /usr/local/etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH debug = 5 key = /usr/local/etc/stunnel/stunnel.pem pid = /usr/local/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 TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds $ uname -a Darwin My-Computer.local 7.7.0 Darwin Kernel Version 7.7.0: Sun Nov 7 16:06:51 PST 2004; root:xnu/xnu-517.9.5.obj~1/RELEASE_PPC Power Macintosh powerpc $ gcc -v Reading specs from /usr/libexec/gcc/darwin/ppc/3.3/specs Thread model: posix gcc version 3.3 20030304 (Apple Computer, Inc. build 1640)

1 0

ldaps error "unknown protocol"
by Mike Partyka 29 Apr '05

29 Apr '05

Hello, Description of problem is as follows: I have a email server package called Scalix, which when installed came with openldap. On the same server i am also running Stunnel, which is already successfully ssl wrapping imap,pop, and smtp protocols. The ldap directory is very handy for an address book internally but we also have people that will be outside the corporate lan and to provide the directory securely would be desirable so i added the lines in the stunnel.conf to wrap ldap as well. I can see the stunnel daemon listening on port 636. But when i try to connect from any ssl aware mail client, such as evolution, or entourage, i get an error indicating failure to authenticate, which i know is not really the problem because the ldap directory is anonymous read access enabled. Debug logging gives more information about what is occurring, here is the conversion when attempting to connect: 2005.04.28 12:15:05 LOG5[27926:1076812720]: ldaps connected from 71.4.124.200:43012 2005.04.28 12:15:05 LOG7[27926:1076812720]: SSL state (accept): before/accept initialization 2005.04.28 12:15:05 LOG7[27926:1076812720]: waitforsocket: FD=14, DIR=read 2005.04.28 12:15:05 LOG7[27926:1076812720]: waitforsocket: ok 2005.04.28 12:15:05 LOG3[27926:1076812720]: SSL_accept: 140760FC: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol 2005.04.28 12:15:05 LOG7[27926:1076812720]: ldaps finished (6 left) Searching the archive is saw someone suggesting that either the ldap server or ldap client was not compiled with ssl support. I know the email clients i am trying to connect with are ssl compatible and maybe someone can set me straight here but i didn't think that the ldap server had to be ssl aware and that was the advantage of stunnel is that it can wrap services that are do not have ssl support? At any rate i believe the ldap server does have ssl support becuase i can see the binary omslapd (provided by Scalix, preceding "om" is there because Scalix is based on HP's Open Mail) links to the ssl library using the ldd command, here is the output, note the bolded line: msp1intmx01:~ # ldd /opt/scalix/bin/omslapd linux- gate.so.1 => (0xffffe000) libom_er.so => /opt/scalix/lib/libom_er.so (0x40018000) libom_ext.so => /opt/scalix/lib/libom_ext.so (0x40023000) libom_ldapth.so => /opt/scalix/lib/libom_ldapth.so (0x4002d000) libom_mdc.so => /opt/scalix/lib/libom_mdc.so (0x4004f000) libom_omldap.so => /opt/scalix/lib/libom_omldap.so (0x4005c000) libom_os.so => /opt/scalix/lib/libom_os.so (0x40079000) libom_sdl.so => /opt/scalix/lib/libom_sdl.so (0x40087000) libom_str.so => /opt/scalix/lib/libom_str.so (0x4008e000) libpthread.so.0 => /lib/tls/libpthread.so.0 (0x400a9000) libc.so.6 => /lib/tls/libc.so.6 (0x400b9000) libom_cvc.so => /opt/scalix/lib/libom_cvc.so (0x401ce000) libom_go.so => /opt/scalix/lib/libom_go.so (0x401e2000) libom_t61.so => /opt/scalix/lib/libom_t61.so (0x401e6000) libom_tfl.so => /opt/scalix/lib/libom_tfl.so (0x401eb000) libom_gcl.so => /opt/scalix/lib/libom_gcl.so (0x401f1000) libom_ccs.so => /opt/scalix/lib/libom_ccs.so (0x401f5000) libdl.so.2 => /lib/libdl.so.2 (0x40203000) libom_cl.so => /opt/scalix/lib/libom_cl.so (0x40206000) libom_cust.so => /opt/scalix/lib/libom_cust.so (0x40215000) libom_da.so => /opt/scalix/lib/libom_da.so (0x4021c000) libom_dit.so => /opt/scalix/lib/libom_dit.so (0x40244000) libom_dr.so => /opt/scalix/lib/libom_dr.so (0x4024a000) libom_hash.so => /opt/scalix/lib/libom_hash.so (0x4027b000) libom_lng.so => /opt/scalix/lib/libom_lng.so (0x4027e000) libom_mes.so => /opt/scalix/lib/libom_mes.so (0x40282000) libom_mim.so => /opt/scalix/lib/libom_mim.so (0x4028a000) libom_ml.so => /opt/scalix/lib/libom_ml.so (0x4029d000) libom_pam.so => /opt/scalix/lib/libom_pam.so (0x402a6000) libom_pwdl.so => /opt/scalix/lib/libom_pwdl.so (0x402b4000) libom_ul.so => /opt/scalix/lib/libom_ul.so (0x402b9000) libom_uni.so => /opt/scalix/lib/libom_uni.so (0x402cc000) libom_im.so => /opt/scalix/lib/libom_im.so (0x402e3000) libom_sfl.so => /opt/scalix/lib/libom_sfl.so (0x402ee000) libcrypt.so.1 => /lib/libcrypt.so.1 (0x4030c000) libom_sml.so => /opt/scalix/lib/libom_sml.so (0x4033d000) libom_tfo.so => /opt/scalix/lib/libom_tfo.so (0x40340000) libom_enc.so => /opt/scalix/lib/libom_enc.so (0x40343000) libom_lkf.so => /opt/scalix/lib/libom_lkf.so (0x40347000) libom_nm.so => /opt/scalix/lib/libom_nm.so (0x4034b000) /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000) libom_uscv.so => /opt/scalix/lib/libom_uscv.so (0x40352000) libom_fstr.so => /opt/scalix/lib/libom_fstr.so (0x4035a000) libom_gen.so => /opt/scalix/lib/libom_gen.so (0x4035c000) libom_xdse.so => /opt/scalix/lib/libom_xdse.so (0x40362000) libom_acl.so => /opt/scalix/lib/libom_acl.so (0x40365000) libom_cdl.so => /opt/scalix/lib/libom_cdl.so (0x4036c000) libom_drsc.so => /opt/scalix/lib/libom_drsc.so (0x40374000) libom_inet.so => /opt/scalix/lib/libom_inet.so (0x40379000) libom_vi.so => /opt/scalix/lib/libom_vi.so (0x40388000) libom_akt.so => /opt/scalix/lib/libom_akt.so (0x40399000) libom_q.so => /opt/scalix/lib/libom_q.so (0x403a1000) libom_date.so => /opt/scalix/lib/libom_date.so (0x403a6000) libom_ssn.so => /opt/scalix/lib/libom_ssn.so (0x403a8000) libom_orname.so => /opt/scalix/lib/libom_orname.so (0x403ac000) libom_culb.so => /opt/scalix/lib/libom_culb.so (0x403af000) libom_dstring.so => /opt/scalix/lib/libom_dstring.so (0x403b3000) libssl.so.0.9.7 => /usr/lib/libssl.so.0.9.7 (0x403b6000) libom_ufcv.so => /opt/scalix/lib/libom_ufcv.so (0x403e7000) libom_vista.so => /opt/scalix/lib/libom_vista.so (0x4040d000) libom_rda.so => /opt/scalix/lib/libom_rda.so (0x40439000) libom_rdudp.so => /opt/scalix/lib/libom_rdudp.so (0x4043e000) libom_rsl.so => /opt/scalix/lib/libom_rsl.so (0x40444000) libom_mp.so => /opt/scalix/lib/libom_mp.so (0x40456000) libom_mpl.so => /opt/scalix/lib/libom_mpl.so (0x4045e000) libom_msg.so => /opt/scalix/lib/libom_msg.so (0x40466000) libom_qml.so => /opt/scalix/lib/libom_qml.so (0x4046c000) libom_tf.so => /opt/scalix/lib/libom_tf.so (0x40471000) libcrypto.so.0.9.7 => /usr/lib/libcrypto.so.0.9.7 (0x4047b000) libom_fmem.so => /opt/scalix/lib/libom_fmem.so (0x4056b000) libom_acf.so => /opt/scalix/lib/libom_acf.so (0x40570000) libom_cvr.so => /opt/scalix/lib/libom_cvr.so (0x40575000) libom_ct.so => /opt/scalix/lib/libom_ct.so (0x40589000) libom_bb.so => /opt/scalix/lib/libom_bb.so (0x405cc000) libom_rtfl.so => /opt/scalix/lib/libom_rtfl.so (0x405e1000) libom_isl.so => /opt/scalix/lib/libom_isl.so (0x405f2000) libom_nf.so => /opt/scalix/lib/libom_nf.so (0x405fc000) libom_nfda.so => /opt/scalix/lib/libom_nfda.so (0x40602000) libom_nsl.so => /opt/scalix/lib/libom_nsl.so (0x40607000) libom_exual.so => /opt/scalix/lib/libom_exual.so (0x4060d000) Stunnel version information is as follows: stunnel 4.05 on i686-suse-linux-gnu PTHREAD with OpenSSL 0.9.7d 17 Mar 2004 Global options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH debug = 5 key = /etc/stunnel/stunnel.pem pid = /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 is running in stand-alone mode and is being started without any parameters that i am aware of, i just used the init script supplied SuSE for their Enterprise 9 server product. Output of "stunnel -f -D 7 is: msp1intmx01:~ # stunnel -f -D 7 2005.04.29 08:27:24 LOG3[3326:1076392064]: -f: No such file or directory (2) Output of "stunnel -V is: msp1intmx01:~ # stunnel -V 2005.04.29 08:30:49 LOG3[3368:1076392064]: -V: No such file or directory (2) Output of "uname -a" msp1intmx01:~ # uname -a Linux msp1intmx01 2.6.5-7.151-smp #1 SMP Fri Mar 18 11:31:21 UTC 2005 i686 i686 i386 GNU/Linux Libc version is 2.3.3 Output of "gcc -v" msp1intmx01:~ # gcc -v Reading specs from /usr/lib/gcc-lib/i586-suse-linux/3.3.3/specs Configured with: ../configure --enable-threads=posix -- prefix=/usr --with-local-prefix=/usr/local -- infodir=/usr/share/info --mandir=/usr/share/man --enable- languages=c,c++,f77,objc,java,ada --disable-checking -- libdir=/usr/lib --enable-libgcj --with-gxx-include- dir=/usr/include/g++ --with-slibdir=/lib --with-system-zlib -- enable-shared --enable-__cxa_atexit i586-suse-linux Thread model: posix gcc version 3.3.3 (SuSE Linux) Openssl version is: msp1intmx01:~ # openssl version OpenSSL 0.9.7d 17 Mar 2004 Regards, -- Michael W. Partyka Jumpnode Systems, LLC Systems Administrator 612.605.5056 Desk 651.208.5734 Cell

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stunnel with pop-3 over SSL, port 995?
by conover＠rahul.net 27 Apr '05

27 Apr '05

Can stunnel be used to connect to a pop-3 over SSL server on port 995? Thanks, John -- John Conover, conover(a)rahul.net, http://www.johncon.com/

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SIGSEGV in init_ssl stunnel 4.10 on solaris 8
by Toni Schmidbauer 27 Apr '05

27 Apr '05

hi, we've got the following problem: - compiled stunnel 4.10 with openssl-0.9.7g - stunnel receives a SIGSEGV when connecting i am really not a C or gdb guru, but running stunnel 4.10 under gdb shows this: # gdb src/stunnel GNU gdb 6.0 Copyright 2003 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "sparc-sun-solaris2.8"... (gdb) set args /usr/local/stunnel-4.10/etc/stunnel/stunnel.conf (gdb) run Starting program: /usr/local/src/stunnel-4.10/src/stunnel /usr/local/stunnel-4.10/etc/stunnel/stunnel.conf [New LWP 1] [New LWP 2] [New LWP 3] [New LWP 4] Program received signal SIGSEGV, Segmentation fault. 0x0002a32c in init_ssl (c=0x11e008) at client.c:298 298 s_poll_add(&c->fds, c->ssl_rfd->fd, (gdb) bt #0 0x0002a32c in init_ssl (c=0x11e008) at client.c:298 #1 0x00029f30 in do_client (c=0x11e008) at client.c:147 #2 0x00029dd8 in client (arg=0x126270) at client.c:120 (gdb) p c->ssl_rfd $1 = (FD *) 0x1 (gdb) so it seems c->ssl_rfd points to nowhere. further investigation reveals that c->ssl_rfd gets overwritten after the call to SSL_accept. stunnel 4.09 works. is this a problem with UCONTEXT? ************************************************************************ information as request on the support page: openssl version: OpenSSL 0.9.7g 11 Apr 2005 uname -a: SunOS coti 5.8 Generic_117350-05 sun4u sparc SUNW,UltraAX-i2 gcc -v: Reading specs from /usr/local/lib/gcc-lib/sparc-sun-solaris2.8/3.3.2/specs Configured with: ../configure --with-as=/usr/ccs/bin/as --with-ld=/usr/ccs/bin/ld --disable-nls --disable-libgcj --enable-languages=c,c++ Thread model: posix gcc version 3.3.2 stunnel log with debug=7: 2005.04.27 08:41:33 LOG5[24386:1]: stunnel 4.10 on sparc-sun-solaris2.8 UCONTEXT+POLL+IPv4 with OpenSSL 0.9.7g 11 Apr 2005 2005.04.27 08:41:33 LOG7[24386:1]: RAND_status claims sufficient entropy for the PRNG 2005.04.27 08:41:33 LOG6[24386:1]: PRNG seeded successfully 2005.04.27 08:41:33 LOG7[24386:1]: Configuration SSL options: 0x00000FFF 2005.04.27 08:41:33 LOG7[24386:1]: SSL options set: 0x00000FFF 2005.04.27 08:41:33 LOG7[24386:1]: Certificate: /usr/local/stunnel-4.10/etc/stunnel/stunnel.pem 2005.04.27 08:41:33 LOG7[24386:1]: Key file: /usr/local/stunnel-4.10/etc/stunnel/stunnel.pem 2005.04.27 08:41:33 LOG6[24386:1]: file ulimit = 256 (can be changed with 'ulimit -n') 2005.04.27 08:41:33 LOG6[24386:1]: poll() used - no FD_SETSIZE limit for file descriptors 2005.04.27 08:41:33 LOG5[24386:1]: 125 clients allowed 2005.04.27 08:41:33 LOG7[24386:1]: FD 5 in non-blocking mode 2005.04.27 08:41:33 LOG7[24386:1]: FD 6 in non-blocking mode 2005.04.27 08:41:33 LOG7[24386:1]: FD 7 in non-blocking mode 2005.04.27 08:41:33 LOG7[24386:1]: SO_REUSEADDR option set on accept socket 2005.04.27 08:41:33 LOG7[24386:1]: https bound to 0.0.0.0:443 2005.04.27 08:41:33 LOG7[24386:1]: Created pid file /usr/local/stunnel-4.10/var/stunnel/stunnel.pid 2005.04.27 08:41:33 LOG7[24386:0]: Waiting -1 second(s) for 2 file descriptor(s) 2005.04.27 08:41:35 LOG7[24386:0]: CONTEXT 1, FD=5, (IN)->() 2005.04.27 08:41:35 LOG7[24386:0]: CONTEXT 1, FD=7, (IN)->(IN) 2005.04.27 08:41:35 LOG7[24386:1]: https accepted FD=9 from 162.25.222.252:35728 2005.04.27 08:41:35 LOG7[24386:1]: Creating a new context 2005.04.27 08:41:35 LOG7[24386:1]: Context 2 created 2005.04.27 08:41:35 LOG7[24386:2]: https started 2005.04.27 08:41:35 LOG7[24386:2]: FD 9 in non-blocking mode 2005.04.27 08:41:35 LOG5[24386:2]: https connected from 162.25.222.252:35728 2005.04.27 08:43:08 LOG7[24386:2]: SSL state (accept): before/accept initialization 2005.04.27 08:43:08 LOG7[24386:2]: SSL state (accept): SSLv3 read client hello A 2005.04.27 08:43:08 LOG7[24386:2]: SSL state (accept): SSLv3 write server hello A 2005.04.27 08:43:08 LOG7[24386:2]: SSL state (accept): SSLv3 write certificate A 2005.04.27 08:43:08 LOG7[24386:2]: SSL state (accept): SSLv3 write server done A 2005.04.27 08:43:08 LOG7[24386:2]: SSL state (accept): SSLv3 flush data ************************************************************************ thanks for your time and help regards toni -- Wer es einmal so weit gebracht hat, dass er nicht | toni at stderror dot at mehr irrt, der hat auch zu arbeiten aufgehoert | Toni Schmidbauer -- Max Planck |

1 1

stunnel crash when multiple connections
by Debin Chen 27 Apr '05

27 Apr '05

Hi, I will appreciate greatly if you can diagnose the following crash problem: I am using stunnel 4.05, working with webserver thttpd to provide a https solution, in linux environment. First I wrote down some noticeable behavior of stunnel. 1) stunnel each time spawns a thread to handle the https connection then destroy the thread. If I browse a lot of pages, then internally a lot of thread ( or process) got created and destroyed. 2) Sometimes after a https request is completed, the thread is still there. Only following request will trigger the thread got destroyed. Normally if there is no activity, just 2 threads left. The problem: During some stress testing, such as multiple ( in my case, actually just 2 or 3) web browser simultaneously issues request to the web server in https, I found out in certain moment stunnel spawns more than 5 or 6 threads to handle the connections, sometimes it crashed without giving out any serious debug error messages. When it crashed, system resource of CPU and memory is still sufficient. Note than I already set timeoutclose=0, that should be done. Best Regards Debin Chen ======================================== Advanced Storage Division Promise Technology, Inc. 580 Cottonwood Drive, Milpitas, CA 95035 Tel: 408-228-1529 CONFIDENTIALITY NOTICE: The information contained in or attached to this email message is either proprietary and/or confidential information, or information intended solely for the use of the individual or entity named above. If the reader of this message is not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify us by email and delete the original message from your computer/server with confirmation to us that you have done so. Thank you.

1 0

connect directly to unix domain socket?
by Marty Lamb 25 Apr '05

25 Apr '05

Hello, Sorry for the newb question, but I've done quite a bit of searching and haven't found a definitive answer either way - and I doubt I'm the first to ask about this. Is there any way to connect an incoming connection directly to a unix domain socket? Some sort of service level option like: connect = /path/to/socket would be ideal, and hopefully I'm just missing something in the docs. If this is not available, I can just exec socat - but that seems like an unnecessary step. Thanks much, Marty

1 0

Newbie question
by Rick Kubowic 25 Apr '05

25 Apr '05

I'm trying to implement a secure TCP tunnel from one PC to another. I've been looking for quite some time and can't seem to find the problem. I've been following the following example of how to start a server service: stunnel -p /path/to/stunnel.pem -d pop3s -r bar:pop3 I've created a generic certificate, but I get the error: Failed to open configuration file -p What am I doing wrong?? Rick Kubowicz ITG Canada Corp. 416-874-0834

2 1

Mailing list web interface
by Michal Trojnara 24 Apr '05

24 Apr '05

Dear Users, I'm glad to announce that mirt.net server is now fully moved to the new location. I hope you'll enjoy the speed. 8-) The mailing list management web interface is operational, again. Best regards, Mike

1 0

Stunnel 4.10 released
by Michal Trojnara 23 Apr '05

23 Apr '05

Here is the ChangeLog entry: Version 4.10, 2005.04.23, urgency: LOW/EXPERIMENTAL: * DLLs for OpenSSL 0.9.7g. * Bugfixes - Missing locking on Win32 platform was added (thx to Yi Lin <yi.lin(a)convergys.com>) - Some problems with closing SSL fixed. * New features - New UCONTEXT user-level non-preemptive threads model is used on systems that support SYSV-compatible ucontext.h. - Improved stunnel3 script with getopt-compatible syntax. * Release notes - This version should be thoroughly tested before using it in the mission-critical environment. Homepage: http://stunnel.mirt.net/ Download: ftp://stunnel.mirt.net/stunnel/ Best regards, Mike

1 0

Patch: Windows version of stunnel 4.09 is not thread-safe
by yi.lin＠convergys.com 23 Apr '05

23 Apr '05

We have been using stunnel on Windows as a SSL proxy to connect to HTTPS server but stunnel kept crashing randomly under load. After some investigation, we found the following: according to OpenSSL document (http://www.openssl.org/docs/crypto/threads.html) "OpenSSL can safely be used in multi-threaded applications provided that at least two callback functions are set. locking_function(int mode, int n, const char *file, int line) is needed to perform locking on shared data structures. (Note that OpenSSL uses a number of global data structures that will be implicitly shared whenever multiple threads use OpenSSL.) Multi-threaded applications will crash at random if it is not set. " The original stunnel package only implements a POSIX Pthread version of locking callback functions, but doesn't provide any implementation for Windows. This has caused random crashes during our testing because the way we use stunnel requires frequent creation/destruction of threads and stunnel is not thread-safe without the locking callbacks. The attached fix attempts to address the problem by implementing the Windows version of locking callbacks using Windows native CRITICAL_SECTION object. =============================================================================================================================== *** sthreads.c Fri Dec 31 02:55:40 2004 --- sthreads_w32.c Thu Apr 14 08:29:07 2005 *************** *** 121,126 **** --- 121,127 ---- #ifdef USE_WIN32 CRITICAL_SECTION stunnel_cs[CRIT_SECTIONS]; + static CRITICAL_SECTION lock_cs[CRYPTO_NUM_LOCKS]; void enter_critical_section(SECTION_CODE i) { EnterCriticalSection(stunnel_cs+i); *************** *** 130,141 **** --- 131,161 ---- LeaveCriticalSection(stunnel_cs+i); } + static void locking_callback(int mode, int type, + #ifdef HAVE_OPENSSL + const /* Callback definition has been changed in openssl 0.9.3 */ + #endif + char *file, int line) { + if(mode&CRYPTO_LOCK) + EnterCriticalSection(lock_cs+type); + else + LeaveCriticalSection(lock_cs+type); + } + + void sthreads_init(void) { int i; /* Initialize stunnel critical sections */ for(i=0; i<CRIT_SECTIONS; i++) InitializeCriticalSection(stunnel_cs+i); + + /* Initialize OpenSSL locking callback */ + for(i=0; i<CRYPTO_NUM_LOCKS; i++) + InitializeCriticalSection(lock_cs+i); + CRYPTO_set_locking_callback(locking_callback); + + } unsigned long stunnel_process_id(void) { (See attached file: sthread_diff) Yi Lin Convergys Corporation yi.lin(a)convergys.com (703)885-5767 -- "NOTICE: The information contained in this electronic mail transmission is intended by Convergys Corporation for the use of the named individual or entity to which it is directed and may contain information that is privileged or otherwise confidential. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email or by telephone (collect), so that the sender's address records can be corrected."

2 1

connection refsed (111)
by RAJADURAI D 20 Apr '05

20 Apr '05

hi I am trying to connect using mysql, there are no fw between the 2 boxes. I tested with stunnel latest version 4.08 in red hat 9,it shows the last message as connection refused (111) after the cipher negotiation Any ideas on how to solve this error plz help me, to short out this problem ? i am using ==> Stunnel 4.08 redhat 9 Kernel 2.4.20-8 mysql Ver 11.18 Distrib 3.23.54,for redhat-linux-gnu(i386) I am using stunnel.pem generated while installing stunnel 4.08 SERVER SIDE [root@scorpion src]# ./stunnel 2005.03.30 12:23:19 : stunnel with OpenSSL 0.9.7a Feb 19 2003 2005.03.30 12:23:19 : Certificate: /usr/local/etc/stunnel/stunnel.pem 2005.03.30 12:23:19 : Key file: /usr/local/etc/stunnel/stunnel.pem 2005.03.30 12:23:19 : 500 clients allowed 2005.03.30 12:23:19 : SO_REUSEADDR option set on accept socket 2005.03.30 12:23:19 : mysqls bound to 0.0.0.0:3307 2005.03.30 12:23:19 : Created pid file /stunnel.pid 2005.03.30 12:27:01 : mysqls accepted FD=7 from 192.168.2.175:33091 2005.03.30 12:27:01 : mysqls started 2005.03.30 12:27:01 : mysqls connected from 192.168.2.175:33091 2005.03.30 12:27:01 : SSL state (accept): before/accept initialization 2005.03.30 12:27:01 : SSL state (accept): SSLv3 read client hello A 2005.03.30 12:27:01 : SSL state (accept): SSLv3 write server hello A 2005.03.30 12:27:01 : SSL state (accept): SSLv3 write certificate A 2005.03.30 12:27:01 : SSL state (accept): SSLv3 write server done A 2005.03.30 12:27:01 : SSL state (accept): SSLv3 flush data 2005.03.30 12:27:01 : SSL state (accept): SSLv3 read client key exchange A 2005.03.30 12:27:01 : SSL state (accept): SSLv3 read finished A 2005.03.30 12:27:01 : SSL state (accept): SSLv3 write change cipher spec A 2005.03.30 12:27:01 : SSL state (accept): SSLv3 write finished A 2005.03.30 12:27:01 : SSL state (accept): SSLv3 flush data 2005.03.30 12:27:01 : 1 items in the session cache 2005.03.30 12:27:01 : 0 client connects (SSL_connect()) 2005.03.30 12:27:01 : 0 client connects that finished 2005.03.30 12:27:01 : 0 client renegotiatations requested 2005.03.30 12:27:01 : 1 server connects (SSL_accept()) 2005.03.30 12:27:01 : 1 server connects that finished 2005.03.30 12:27:01 : 0 server renegotiatiations requested 2005.03.30 12:27:01 : 0 session cache hits 2005.03.30 12:27:01 : 0 session cache misses 2005.03.30 12:27:01 : 0 session cache timeouts 2005.03.30 12:27:01 : SSL accepted: new session negotiated 2005.03.30 12:27:01 : Negotiated ciphers: AES256-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA1 2005.03.30 12:27:01 : mysqls connecting 127.0.0.1:3306 2005.03.30 12:27:01 : connect_wait: waiting 10 seconds 2005.03.30 12:27:01 : connect_wait: getsockopt: Connection refused (111) 2005.03.30 12:27:01 : Failed to initialize remote connection 2005.03.30 12:27:01 : mysqls finished (0 left) ====================================================== CLIENT SIDE [root@redhat src]# ./stunnel 2005.03.30 23:24:42 LOG5[7383:1075999904]: stunnel 4.08 on i686-pc-linux-gnu PTH READ+POLL+IPv4+LIBWRAP with OpenSSL 0.9.7a Feb 19 2003 2005.03.30 23:24:42 LOG7[7383:1075999904]: RAND_status claims sufficient entropy for the PRNG 2005.03.30 23:24:42 LOG6[7383:1075999904]: PRNG seeded successfully 2005.03.30 23:24:42 LOG7[7383:1075999904]: Certificate: /usr/local/etc/stunnel/s tunnel.pem 2005.03.30 23:24:42 LOG7[7383:1075999904]: Key file: /usr/local/etc/stunnel/stun nel.pem 2005.03.30 23:24:42 LOG6[7383:1075999904]: file ulimit = 1024 (can be changed wi th 'ulimit -n') 2005.03.30 23:24:42 LOG6[7383:1075999904]: poll() used - no FD_SETSIZE limit for file descriptors 2005.03.30 23:24:42 LOG5[7383:1075999904]: 500 clients allowed 2005.03.30 23:24:42 LOG7[7383:1075999904]: FD 4 in non-blocking mode 2005.03.30 23:24:42 LOG7[7383:1075999904]: FD 5 in non-blocking mode 2005.03.30 23:24:42 LOG7[7383:1075999904]: FD 6 in non-blocking mode 2005.03.30 23:24:42 LOG7[7383:1075999904]: SO_REUSEADDR option set on accept soc ket 2005.03.30 23:24:42 LOG7[7383:1075999904]: mysqls bound to 0.0.0.0:3306 2005.03.30 23:24:42 LOG7[7383:1075999904]: Created pid file /stunnel.pid 2005.03.30 23:32:19 LOG7[7383:1075999904]: mysqls accepted FD=7 from 127.0.0.1:3 3090 2005.03.30 23:32:19 LOG7[7383:1075999904]: FD 7 in non-blocking mode 2005.03.30 23:32:19 LOG7[7383:1076067520]: mysqls started 2005.03.30 23:32:20 LOG5[7383:1076067520]: mysqls connected from 127.0.0.1:33090 2005.03.30 23:32:20 LOG7[7383:1076067520]: FD 8 in non-blocking mode 2005.03.30 23:32:20 LOG7[7383:1076067520]: mysqls connecting 192.168.2.210:3307 2005.03.30 23:32:20 LOG7[7383:1076067520]: connect_wait: waiting 10 seconds 2005.03.30 23:32:20 LOG7[7383:1076067520]: connect_wait: connected 2005.03.30 23:32:20 LOG7[7383:1076067520]: Remote FD=8 initialized 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): before/connect initialization 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 write client hello A 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 read server hello A 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 read server certificate A 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 read server done A 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 write client key exchange A 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 write change cipher spec A 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 write finished A 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 flush data 2005.03.30 23:32:20 LOG7[7383:1076067520]: SSL state (connect): SSLv3 read finished A 2005.03.30 23:32:20 LOG7[7383:1076067520]: 1 items in the session cache 2005.03.30 23:32:20 LOG7[7383:1076067520]: 1 client connects (SSL_connect()) 2005.03.30 23:32:20 LOG7[7383:1076067520]: 1 client connects that finished 2005.03.30 23:32:20 LOG7[7383:1076067520]: 0 client renegotiatations requeste d 2005.03.30 23:32:20 LOG7[7383:1076067520]: 0 server connects (SSL_accept()) 2005.03.30 23:32:20 LOG7[7383:1076067520]: 0 server connects that finished 2005.03.30 23:32:20 LOG7[7383:1076067520]: 0 server renegotiatiations request ed 2005.03.30 23:32:20 LOG7[7383:1076067520]: 0 session cache hits 2005.03.30 23:32:20 LOG7[7383:1076067520]: 0 session cache misses 2005.03.30 23:32:20 LOG7[7383:1076067520]: 0 session cache timeouts 2005.03.30 23:32:20 LOG6[7383:1076067520]: SSL connected: new session negotiated 2005.03.30 23:32:20 LOG6[7383:1076067520]: Negotiated ciphers: AES256-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA1 2005.03.30 23:32:20 LOG3[7383:1076067520]: SSL_read: Connection reset by peer (1 04) 2005.03.30 23:32:20 LOG5[7383:1076067520]: Connection reset: 0 bytes sent to SSL , 0 bytes sent to socket 2005.03.30 23:32:20 LOG7[7383:1076067520]: mysqls finished (0 left) RUNNING mysqL IN AN SEPARATE TERMINAL [root@redhat bharathi]# mysql -h 127.0.0.1 -u anirudh -p Enter password: ERROR 2013: Lost connection to MySQL server during query

2 2

Disabling IPv6
by Punitha 20 Apr '05

20 Apr '05

Hello Everyone !! I need to build Stunnel-4.09 in HP-UX11.11 without the support of IPv6. I did not use --enable-ipv6 option. In the configure log I could see the reference of getaddrinfo and getnameinfo functions. Is that refers any of the system file or the function defined in the souce code? I used `nm stunnel | grep getaddrinfo` and it shows the following. $ nm stunnel | grep getaddrinfo getaddrinfo | |undef |code | getaddrinfo | 118768|uext |stub | $ I need to confirm the source(from where they are taken) of getaddrinfo and getnameinfo functions. Is that related with the support of ipv6 in any way? Any of you please make me clear. Thanx in ADVANCE. Regards, Punitha.

2 1

Disabling IPv6
by Punitha 20 Apr '05

20 Apr '05

Hello Everyone !! I need to build Stunnel-4.09 in HP-UX11.11 without the support of IPv6. I did not use --enable-ipv6 option. In the configure log I could see the reference of getaddrinfo and getnameinfo functions. Is that refers any of the system file or the function defined in the souce code? I used `nm stunnel | grep getaddrinfo` and it shows the following. $ nm stunnel | grep getaddrinfo getaddrinfo | |undef |code | getaddrinfo | 118768|uext |stub | $ I need to confirm the source(from where they are taken) of getaddrinfo and getnameinfo functions. Is that related with the support of ipv6 in any way? Any of you please make me clear. Thanx in ADVANCE. Regards, Punitha.

1 0

Reporting problems
by Michal Trojnara 19 Apr '05

19 Apr '05

Dear Users, Please stop reporting problems with obsolete versions of stunnel. You should always upgrade to the latest stunnel and OpenSSL first, than repeat your tests and report a problem. Best regards, Mike

2 1

Stunnel - Transfer loop executes not transferring any data.
by Michel Esber 19 Apr '05

19 Apr '05

Hello All, I am running a proprietary daemon on port 443 that accepts incoming connections. We are experiencing problems when activating stunnel on our production box. Everytime that we run our daemon with stunnel, our CPU and memory/swap area consumption is extremely intensive. Each stunnel process consumes approximately 37Mb of RSS memory. I have browsed through my logs and here is what I found: 2005.04.18 14:35:00 LOG3[15242:1245336]: transfer() loop executes not transferring any data 2005.04.18 14:35:06 LOG3[15242:1245336]: please report the problem to Michal.Trojnara(a)mirt.net 2005.04.18 14:35:06 LOG3[15242:1245336]: socket open rd=yes wr=yes, ssl open rd=yes wr=yes 2005.04.18 14:35:06 LOG3[15242:1245336]: socket ready rd=no wr=no, ssl ready rd=no wr=no 2005.04.18 14:35:06 LOG3[15242:1245336]: check_SSL_pending=0, ssl_closing=0 2005.04.18 14:35:06 LOG5[15242:1245336]: Connection reset: 258 bytes sent to SSL, 153319 bytes sent to socket Some details: a) My configuration file: [https] accept = 443 exec = /path/to/daemon execargs = daemon -ssl stunnel 4.07 on i686-pc-linux-gnu PTHREAD+POLL+IPv4+LIBWRAP with OpenSSL 0.9.6b [engine] 9 Jul 2001 Global options cert = /usr/local/etc/stunnel/stunnel.pem ciphers = ALL:!ADH:RC4+RSA:+SSLv2:@STRENGTH debug = 5 key = /usr/local/etc/stunnel/stunnel.pem pid = /usr/local/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 TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds b) glibc-2.2.4-31.7 glibc-devel-2.2.4-32.8 libcap-1.10-6 glibc-common-2.2.4-31.7 c) uname -a Linux myserver 2.4.9-e.57enterprise #1 SMP Thu Dec 2 20:45:51 EST 2004 i686 unknown d) gcc -v gcc version 2.96 20000731 (Red Hat Linux 7.2 2.96-118.7.2) e) openssl version OpenSSL 0.9.6b [engine] 9 Jul 2001 Can anyone shred some light? I believe I should upgrade some of my core components (gcc / openssl). I just need to make sure this is the right direction. Thanks in advance, X------------------- Michel Esber MCSE, MCSA, MCDBA Automatos - www.automatos.com US: 1 (866) 2293584

2 1

stunnel generating defuncts
by Serxio Barral 19 Apr '05

19 Apr '05

Hi there! I'm using stunnel as client with SuSE SLES 8. Usually after several days working OK (up to two weeks) it begins to generate defunct processes for every transfer. At first, stunnel version was 3.14 (the one that comes out of the box with SLES 8), but now I have downloaded an compiled 3.26 and it just happens the same. killing stunnel won't help, since relaunching it again turns on generating defuncts. Situation does not come back to normal until rebooting the server. Any hint on this issue? Thanks in advance, Serxio Barral.

1 0

stunnel generating defuncts
by SERXIO BARRAL PAN/ Generali-España 19 Apr '05

19 Apr '05

Hi there! I'm using stunnel as client with SuSE SLES 8. Usually after several days working OK (up to two weeks) it begins to generate defunct processes for every transfer. At first, stunnel version was 3.14 (the one that comes out of the box with SLES 8), but now I have downloaded an compiled 3.26 and it just happens the same. killing stunnel won't help, since relaunching it again turns on generating defuncts. Situation does not come back to normal until rebooting the server. Any hint on this issue? Thanks in advance, Serxio Barral.

1 0

Please Help! I keep getting the same error.
by Theodore W. Hildebrandt 11 Apr '05

11 Apr '05

Refer to my submission of 03/24/05: "error:1408F10B:SSL . . . " I had hoped that someone would tell me how to get around this error, but no message has appeared in the stunnel Archive. I have now ftp'd version 4.09 and tried it, with the same results. I wait and wait for a connection, and finally interrupt the process, since it's not going anywhere. And then I get the "error:1408F10B. . ." message in the stunnel log. Since I seem to be able to send e-mail from my old Pentium II computer (Windows 98SE) I'm, using it so send this message. [Note that I can still receive e-mail on the new Dell Pentium IV machine (Windows XP Home). I just can't send anything.] Doesn't anyone have answers? Ted Hildebrandt

1 0

Unexpected closed connections
by Rory Campbell-Lange 11 Apr '05

11 Apr '05

Hi Everyone We have been very happily using stunnel for about 5 months connecting a site office back to a main office, tunnelling imap connections. We are suddenly seeing lots of disconnection messages and people at a. can no longer see their mail on d. The server suffers a "socket write shutdown" condition and shuts down the associated process. We have restarted the routers and firewalls and all seems to be working fine, other than stunnel. I'd be grateful for any insight or further help. Many thanks Rory Present arrangement: a. site client | b. site server port forwarded to c. | | internet | | c. main office server port forwarded to d. | d. imap server Server b forwards imap connections securely to the main office server, which then passes on on the imap connections to the imap server. Server b connects through the following inetd line: imaph stream tcp nowait nobody /usr/sbin/stunnel /usr/sbin/stunnel -c -r server_c_address:imap We are running version 3.26 on debian: stunnel 3.26 on i386-pc-linux-gnu PTHREAD+LIBWRAP with OpenSSL 0.9.7e 25 Oct 2004 Server shows following disconnect messages: 2005.04.11 13:21:46 LOG7[13320:163848]: SSL alert (read): warning: close notify 2005.04.11 13:21:46 LOG7[13320:163848]: SSL closed on SSL_read 2005.04.11 13:21:46 LOG7[13320:163848]: SSL alert (write): warning: close notify 2005.04.11 13:21:46 LOG7[13320:163848]: SSL write shutdown (output buffer empty) 2005.04.11 13:21:46 LOG7[13320:163848]: Socket write shutdown (output buffer empty) 2005.04.11 13:21:46 LOG5[13320:163848]: Connection closed: 92 bytes sent to SSL, 0 bytes sent to socket 2005.04.11 13:21:46 LOG7[13320:163848]: 10.0.0.24.imap finished (6 left) Client logs: Apr 11 15:50:26 hald stunnel[4672]: server_b.imaps connected from 10.0.1.54:49301 Apr 11 15:55:05 hald stunnel[4672]: SSL_connect: Peer suddenly disconnected ... Apr 11 15:49:55 hald stunnel[4655]: 195.172.252.146.imaps connected from 10.0.1.52:49819 Apr 11 15:54:08 hald stunnel[4655]: SSL_connect: Peer suddenly disconnected -- Rory Campbell-Lange <rory(a)campbell-lange.net> <www.campbell-lange.net>

1 0

Re: [stunnel-users] Pass IP Attn: Alexander Lazic
by Tim Brown 10 Apr '05

10 Apr '05

Nope...I see Cygwin is a Linux-like environment for Windows. Can you send me the stunnel.exe that already has this patch compiled? This works for windows? thanks. ----- Original Message ----- From: "Alexander Lazic" <al-stunnel(a)none.at> To: "Tim Brown" <tbrown2376(a)adelphia.net> Sent: Sunday, April 10, 2005 12:06 PM Subject: Re: [stunnel-users] Pass IP Attn: Alexander Lazic > On Son 10.04.2005 10:24, Tim Brown wrote: >>Al....not following how to do this from Windows..cmd prompt? > > Don't you use cygwin? > > al ;-) > >>From: "Alexander Lazic" <al-stunnel(a)none.at> >>To: "Tim Brown" <tbrown2376(a)adelphia.net> >>Cc: <stunnel-users(a)mirt.net> >>Sent: Sunday, April 10, 2005 4:28 AM >>Subject: Re: [stunnel-users] Pass IP Attn: Alexander Lazic >> >> >>>On Son 10.04.2005 00:33, Tim Brown wrote: >>>>Al...how do I install this patch? ...I running stunnel 4.07 >>> >>>Have you ever used the program 'patch'? >>> >>>>Thanks for your help. >>> >>>get stunnel-4.07.tar.gz >>>extract stunnel-4.07.tar.gz >>>get the patch >>>call patch -p0 < the_patch_file >>> >>>al ;-) >>> >>>>From: "Alexander Lazic" <al-stunnel(a)none.at> >>>>To: <tbrown2376(a)adelphia.net> >>>>Cc: <stunnel-users(a)mirt.net> >>>>Sent: Saturday, April 09, 2005 3:54 AM >>>>Subject: Re: [stunnel-users] Pass IP Attn: Alexander Lazic >>>> >>>> >>>>>Hi, >>>>> >>>>>On Fre 08.04.2005 12:48, tbrown2376(a)adelphia.net wrote: >>>>>>Attn: Alexander Lazic >>>>>> >>>>>>Can you please send me the patch for: >>>>>>patch for HTTP => X-Forwarded-For Header >>>>>> >>>>>>to: tbrown2376(a)adelphia.net >>>>> >>>>>You can get it from: >>>>> >>>>>http://stunnel.mirt.net/pipermail/stunnel-users/2005-February/000331.html >>>>> >>>>>or you can wait for monday, then i can send you the patch. >>>>> >>>>>al ;-) >>>>> >>>>_______________________________________________ >>>>stunnel-users mailing list >>>>stunnel-users(a)mirt.net >>>>http://stunnel.mirt.net/mailman/listinfo/stunnel-users >> >>_______________________________________________ >>stunnel-users mailing list >>stunnel-users(a)mirt.net >>http://stunnel.mirt.net/mailman/listinfo/stunnel-users

2 1

stunnel 4.09 error message-- s_poll_wait:invalid argurment <WSAEINVAL> <10022>
by Ed Huckins 10 Apr '05

10 Apr '05

Occurs when I upgraded from stunnel 4.08 to 4.09. Using OpenSSL 0.9.7f . Stunnel.conf looks like # We're running as a client to SSLify the POP & IMAP connections client=yes # POP3 service, listens on localhost:11110 [dslx-pop3s] accept=localhost:11110 connect=mail.dslextreme.com:995 What do I need to add when going from 4.08 to 4.09? Everything seems to work; just a reset of the connection occurs instead of a close. --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 0514-3, 04/10/2005 Tested on: 4/10/2005 10:40:50 AM

1 0

Pass IP Attn: Alexander Lazic
by tbrown2376＠adelphia.net 10 Apr '05

10 Apr '05

Attn: Alexander Lazic Can you please send me the patch for: patch for HTTP => X-Forwarded-For Header to: tbrown2376(a)adelphia.net Thanks. On Die 29.03.2005 11:00, Tim Brown wrote: >I am running Stunnel version 4.07 on a Windows 2000 server. Is there >any way to pass the originating IP through Stunnel to my server >application? As it is now Stunnel is passing the server IP for all >requests. I have send a patch for HTTP => X-Forwarded-For Header to the list. al ;-)

3 4

Pass IP Attn: Alexander Lazic
by Tim Brown 09 Apr '05

09 Apr '05

Alexander Lazic Can you please send me the patch for: patch for HTTP => X-Forwarded-For Header to: tbrown2376(a)adelphia.net Thanks. On Die 29.03.2005 11:00, Tim Brown wrote: >I am running Stunnel version 4.07 on a Windows 2000 server. Is there >any way to pass the originating IP through Stunnel to my server >application? As it is now Stunnel is passing the server IP for all >requests. I have send a patch for HTTP => X-Forwarded-For Header to the list. al ;-) Tim Brown VP Network Services Florida Telco Credit Union Ph: 904.723.6315 Toll Free: 800.342.2352 ext. 6315 Fax: 904.722.6615 <mailto:[email protected]> tbrown(a)floridatelco.org Confidentiality Notice: This email may contain confidential and privileged material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, be advised that any unauthorized disclosure, copying, distribution, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately delete this message and attachments (including all copies) and notify the sender by return e-mail or by phone at 904.723.6300.

3 3

stunnel and NNTP on windows - best practices
by Sir Thanksalot 08 Apr '05

08 Apr '05

Hi all, I am trying to use stunnel for SSL access to a NNTP newserver and found quite a few pages that list ways of doing that. I personally am using xnews as my newsreader, and I have seen variations of the same instructions with different software (Agent, Free Agent for newsreaders, Pegasus Mail as your mail application etc.). For completeness sake, here are some of the ones that I've found - http://www.cotse.net/users/putty/ssl (for Xnews and stunnel 4.x) http://www.geocities.com/d4vidb/x_setup13.html (for Xnews and stunnel 3.x - doesn't use the stunnel.conf file necessary in stunnel 4.x) http://www.noderunner.net/~llin/old/nntp-ssl.html (for a newsreader and stunnel 3.x. It also has links to a stunnel.conf file for stunnel 4.x users) In all these instructions (whether using the stunnel 3.x commandline options or using the stunnel.conf file for stunnel 4.x), I haven't seen any instructions about creating any certificates or public/private keys or a passphrase. Also there doesn't seem to be any writeup on what algorithm actually ends up getting used or even a way to pick which algorithm to use. What's the best practise for users? Should they do anything extra? Set up key pairs? Choose a default algorithm? Thanks. -- _______________________________________________ NEW! Lycos Dating Search. The only place to search multiple dating sites at once. http://datingsearch.lycos.com

1 0

TIMEOUTclose
by Joe Abbey 08 Apr '05

08 Apr '05

Background: I have been having issues getting Entourage to connect with my mail server over POP3S. Entourage will connect, communicate, and then hangs for 60 seconds. According to tcpdumps, Entourage appears to hang until a timeout. Connecting directly to the pop3 daemon, bypassing stunnel, there is no lag. Therefore something appears to be wrond with the stunnel/Entourage interaction. To get Entourage to work with POP3S and have virtually no lag, I've set in my stunnel.conf TIMEOUTclose = 2 for [pop3s]. Question: Is there any reason not to set TIMEOUTclose = 0? Thanks! Joe

1 0

Pass IP Attn: Alexander Lazic
by tbrown2376＠adelphia.net 08 Apr '05

08 Apr '05

ATTN: Alexander Lazic Can you please send me the patch for: patch for HTTP => X-Forwarded-For Header to: tbrown2376(a)adelphia.net Thanks. On Die 29.03.2005 11:00, Tim Brown wrote: >I am running Stunnel version 4.07 on a Windows 2000 server. Is there >any way to pass the originating IP through Stunnel to my server >application? As it is now Stunnel is passing the server IP for all >requests. I have send a patch for HTTP => X-Forwarded-For Header to the list. al ;-)

1 0

Compilation error on windows, cannot find "-lssl"
by Billinger Olle 07 Apr '05

07 Apr '05

Hi I'm trying to compile stunnel 4.08 on windows using mingw, with openssl-0.9.7f. I have edited the Makefile.w32 and it compiles ok until it cannot find the "-lssl". Any suggestions are welcome. //Olle ************************************** $ make -f Makefile.w32 stunnel.exe gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o stunnel.o stunnel.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o ssl.o ssl.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o client.o client.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o protocol.o protocol.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o sthreads.o sthreads.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o log.o log.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o options.o options.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o network.o network.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o resolver.o resolver.c gcc -g -O2 -Wall -DUSE_WIN32 -DHAVE_OPENSSL -I/c/openssl/include -c -o gui.o gui.c gcc -s -o stunnel.exe stunnel.o ssl.o client.o protocol.o sthreads.o log.o options.o network.o resolver.o gui.o resources.o -L/c/openssl/bin -lwsock32 -lgdi32 -lssl -mwindows c:\mingw\bin\..\lib\gcc-lib\mingw32\3.2.3\..\..\..\..\mingw32\bin\ld.exe: cannot find -lssl make: *** [stunnel.exe] Error 1 My Makefile.w32 ******************* SSLDIR=/c/openssl DEFINES=-DUSE_WIN32 -DHAVE_OPENSSL CFLAGS=-g -O2 -Wall $(DEFINES) -I$(SSLDIR)/include LDFLAGS=-s # LIBS=-L$(SSLDIR)/out -lssl -lcrypto -lwsock32 -lgdi32 LIBS=-L$(SSLDIR)/bin -lwsock32 -lgdi32 -lssl OBJS=stunnel.o ssl.o client.o protocol.o sthreads.o log.o options.o network.o resolver.o gui.o resources.o stunnel.exe: $(OBJS) $(CC) $(LDFLAGS) -o stunnel.exe $(OBJS) $(LIBS) -mwindows clean: rm *.o rm stunnel.exe #resources.o: resources.rc resources.h # windres resource.rc resources.o $(OBJS): *.h Makefile.w32 *********************

1 0

Stunnel.conf reload
by CIM Massy 05 Apr '05

05 Apr '05

Hi, is there a way, under win32, to have stunnel reload its .conf file and certificates without restarting the service ? (A kind of SIGHUP) Thanks, Phil

1 0

Stunnel and CRLs
by CIM Massy 05 Apr '05

05 Apr '05

Hi, is there a way to automagically mutually verify certificates (verify=3) and to check the certificates against a .crl file hosted on a web server ? I want my "VNC over Stunnel" host check if the incoming connexions are authorized or if the certificates have expired / been revoked. Thanks, Phil

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stunnel 4.09 problem: Connection rejected: too many clients
by Steven Van Acker 04 Apr '05

04 Apr '05

Hi, after upgrading to stunnel 4.09, we are having 2 problems with it that did not exist in a previous version (our case: stunnel 4.05 without pthreads) ---[ My testsetup is as follows: * stunnel listening on port 4321, connects to localhost port 13 (daytime) * daytime is enabled in inetd * stunnel was compiled without pthreads * ulimit -u = 8192 ---[ problem 1 At first, it works fine. For every incoming connection, the process forks and data is transferred. However, when the connection is closed, the forked process remains hanging for a while (about 1 minute) and then exits. This in itself is not a real problem, except that it generates a lot of processes. (and maybe causes problem 2 ?) ---[ data and logs concerning problem 1 (process hangs for 1 minute): I run the following command: openssl s_client -connect 192.168.2.119:4321 the output follows immediately The logfile (debug = debug) looks like this: 2005.03.31 14:05:05 LOG7[4552:0]: daytime accepted FD=8 from 192.168.2.103:47200 2005.03.31 14:05:05 LOG7[4552:0]: FD 8 in non-blocking mode 2005.03.31 14:05:05 LOG7[4553:0]: daytime started 2005.03.31 14:05:05 LOG5[4553:0]: daytime connected from 192.168.2.103:47200 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): before/accept initialization 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 read client hello A 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 write server hello A 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 write certificate A 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 write server done A 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 flush data 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 read client key exchange A 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 read finished A 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 write change cipher spec A 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 write finished A 2005.03.31 14:05:05 LOG7[4553:0]: SSL state (accept): SSLv3 flush data 2005.03.31 14:05:05 LOG7[4553:0]: 1 items in the session cache 2005.03.31 14:05:05 LOG7[4553:0]: 0 client connects (SSL_connect()) 2005.03.31 14:05:05 LOG7[4553:0]: 0 client connects that finished 2005.03.31 14:05:05 LOG7[4553:0]: 0 client renegotiatations requested 2005.03.31 14:05:05 LOG7[4553:0]: 1 server connects (SSL_accept()) 2005.03.31 14:05:05 LOG7[4553:0]: 1 server connects that finished 2005.03.31 14:05:05 LOG7[4553:0]: 0 server renegotiatiations requested 2005.03.31 14:05:05 LOG7[4553:0]: 0 session cache hits 2005.03.31 14:05:05 LOG7[4553:0]: 0 session cache misses 2005.03.31 14:05:05 LOG7[4553:0]: 0 session cache timeouts 2005.03.31 14:05:05 LOG6[4553:0]: SSL accepted: new session negotiated 2005.03.31 14:05:05 LOG6[4553:0]: Negotiated ciphers: RC4-SHA SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=SHA1 2005.03.31 14:05:05 LOG7[4553:0]: FD 7 in non-blocking mode 2005.03.31 14:05:05 LOG7[4553:0]: daytime connecting 127.0.0.1:13 2005.03.31 14:05:05 LOG7[4553:0]: connect_wait: waiting 10 seconds 2005.03.31 14:05:05 LOG7[4553:0]: connect_wait: connected 2005.03.31 14:05:05 LOG7[4553:0]: Remote FD=7 initialized 2005.03.31 14:05:05 LOG7[4553:0]: Socket closed on read 2005.03.31 14:05:05 LOG7[4553:0]: SSL write shutdown 2005.03.31 14:05:05 LOG7[4553:0]: SSL alert (write): warning: close notify 2005.03.31 14:05:05 LOG7[4553:0]: SSL_shutdown retrying 2005.03.31 14:05:06 LOG7[4553:0]: SSL alert (read): warning: close notify 2005.03.31 14:05:06 LOG7[4553:0]: SSL closed on SSL_read 2005.03.31 14:05:06 LOG7[4553:0]: Socket write shutdown When I check netstat, the connection from the client to stunnel is in the CLOSE_WAIT state and the connection from stunnel to the daytime server is in TIME_WAIT state then 1 minute later, this follows: 2005.03.31 14:06:06 LOG6[4553:0]: s_poll_wait timeout: connection close 2005.03.31 14:06:06 LOG5[4553:0]: Connection closed: 26 bytes sent to SSL, 0 bytes sent to socket 2005.03.31 14:06:06 LOG7[4553:0]: removing pid file /stunnel.pid 2005.03.31 14:06:06 LOG7[4552:0]: Steven: going into client_status with num_clients = 1 2005.03.31 14:06:06 LOG7[4552:0]: Process 4553 finished with code 0 (0 left) Now, netstat no longer shows the connections in any state. ---[ problem 2 Another problem that was found is that after bombarding stunnel with lots of connections, it stops accepting new connections. This would be normal if all connections remained open, but they are all closed. This is the error: Mar 31 13:53:40 hostname stunnel[13044]: Connection rejected: too many clients (>=4000) netstat only shows +- 500 connections, of which none are aimed at the stunnel process in question (port 4321 in my test setup) there is only 1 stunnel process active aswell. I dug into the problem a bit and it probably has to do with num_clients not being decreased after a process is closed (although I can not find any specifics :/) greets, -- Steven

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Terminal services and stunnel 4.09
by Mattias Olsson 01 Apr '05

01 Apr '05

Hi! Im tying to access an internal Win2003 terminal server from my Linux box (internet). As i understand it stunnel should do the work. I have read some documents but im not sure... This is my setup. Linuxbox ----> Linuxbox ssh server | Firewall | Terminal server i wish to access. Can this be done or do i have to open a port in the fw to access the TS directly? Should stunnel.conf look like this on my linuxbox (client) cert = /usr/local/etc/stunnel/mail.pem client = yes On the TS? [TS] accept = 3000 connect = 3389 Should it have cert = ? Or could i on my linux ssh server have a config looking like this: [TS-remote] accept = 3000 connect = <internal-ip>:3389 Should it have cert = ? A novice man sends his best regards and thanks! /Kaz -- Mvh / Regards Mattias Olsson - aka - KaZaMaNIaC

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Does stunnel work on Windows 2000 & SIMP(Secure Instant Messaging) ??
by DK 01 Apr '05

01 Apr '05

Hi Group, I have a windows 2000 box & want to communicate securely with someone else via SIMP(Secure Instant Messaging Protocol - http://www.winfosec.com/simp.php) I know that SIMP Instant Messaging is a "Direct Connection" & does NOT go through an intermediary server & that its encrypted, but being the security nut I am, I want to know if "stunnel" handles the SIMP protocols ? ... as I can't find anywhere what the SIMP protocols are ... because as I have read in the stunnel FAQ, stunnel does not handle UDP. Regards, David __________________________________ Do you Yahoo!? Yahoo! Personals - Better first dates. More second dates. http://personals.yahoo.com

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Pass IP
by Tim Brown 31 Mar '05

31 Mar '05

I am running Stunnel version 4.07 on a Windows 2000 server. Is there any way to pass the originating IP through Stunnel to my server application? As it is now Stunnel is passing the server IP for all requests. Thanks. Confidentiality Notice: This email may contain confidential and privileged material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, be advised that any unauthorized disclosure, copying, distribution, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately delete this message and attachments (including all copies) and notify the sender by return e-mail or by phone at 904.723.6300.

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help
by Maddalena.Pulcini＠seleniacomms.com 31 Mar '05

31 Mar '05

Hi Mike, Thank you for your precious help. I am using stunnel as SSL client. The SSL server runs in a router. As you suggested me, I have done these changes: at first I have modified the stunnel.conf with options = SSL_OP_TLS_BLOCK_PADDING_BUG stunnel.conf ============================== client = yes debug=7 options = SSL_OP_TLS_BLOCK_PADDING_BUG [telnet] accept = 23 connect = 10.36.3.144:4433 ============================= but I have got this error ======================================= file stunnel.conf line 5: Illegal SSL option 2005.03.31 13:26:48 LOG3[3396:3716]: Server is down ======================================= After I have changed the stunnel.conf in this way: stunnel.conf ============================== client = yes debug=7 ciphers = RC4-MD5 [telnet] accept = 23 connect = 10.36.3.144:4433 ============================== The problem I had is now solved. But my question is: how can I know more about this protocol incompatibility? Is there an accurate documentation about that and also about stunnel configuration? Sorry but sometimes it's difficult for me to find (in the FAQ or other sessions) the informations that I need. Thanks&Regards Maddalena

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Terminal services and stunnel 4.09
by Mattias Olsson 31 Mar '05

31 Mar '05

Hi! Im tying to access an internal Win2003 terminal server from my Linux box (internet). As i understand it stunnel should do the work. I have read some documents but im not sure... This is my setup. Linuxbox ----> Linuxbox ssh server | Firewall | Terminal server i wish to access. Can this be done or do i have to open a port in the fw to access the TS directly? Should stunnel.conf look like this on my linuxbox (client) cert = /usr/local/etc/stunnel/mail.pem client = yes On the TS? [TS] accept = 3000 connect = 3389 Should it have cert = ? Or could i on my linux ssh server have a config looking like this: [TS-remote] accept = 3000 connect = <internal-ip>:3389 Should it have cert = ? A novice man sends his best regards and thanks! /Kaz

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Re: [stunnel-users] Libssl32.dll and Libeay32.dll Patents
by Brian Hatch 30 Mar '05

30 Mar '05

> I live in Maryland, United States. Can somebody please tell me if there > is a patent or some kind of legal restriction on the Libssl32.dll and > Libeay32.dll files available in the > http://www.stunnel.org/download/stunnel/win32/ directory? I would > really like to avoid compiling OpenSSL manually...gave it a shot this > evening and it bombed. I need to use Stunnel for strictly internal > purposes and not for any profit. The IDEA algorithm is patented, but I don't think Mike included that in his builds. You can configure Stunnel to only use specific ciphers, in which case you wouldn't be using it regardless. Does that make it legal? Consult a lawyer. Software patents suck. I'd download the openssl.exe and the libs and run 'openssl.exe ciphers -v' and see exactly which ciphers it includes and avoid any from which your legal team suggess you run away. -- Brian Hatch If we aren't supposed Systems and to eat animals, why Security Engineer are they made of meat? http://www.ifokr.org/bri/ Every message PGP signed

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Stunnel 4.09 released
by Michal Trojnara 26 Mar '05

26 Mar '05

New stunnel 4.09 can be found on my FTP site: ftp://stunnel.mirt.net/stunnel/ Here is the ChangeLog entry: * DLLs for OpenSSL 0.9.7f. * Bugfixes - Compilation problem with undeclarated socklen_t fixed. - TIMEOUTclose is not used when there is any data in the buffers. - Stunnel no longer relies on close_notify with SSL 2.0 connections, since SSL 2.0 protocol does not have any alerts defined. - Closing SSL socket when there is some data in SSL output buffer is detected and reported as an error. - Install/chmod race condition when installing default certificate fixed. - Stunnel no longer installs signal_handler on ignored signals. Best regards, Mike

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help
by Maddalena.Pulcini＠seleniacomms.com 25 Mar '05

25 Mar '05

Hi, I downloaded libeay32.dll and linssl32.dll. I started stunnel (4.07) and I did telnet to my router; after handshake I had the same problem. Client Debug ================ 2005.03.24 15:03:28 LOG5[3392:3104]: stunnel 4.07 on x86-pc-mingw32-gnu WIN32+IPv6 with OpenSSL 0.9.7f 22 Mar 2005 2005.03.24 15:03:28 LOG7[3392:2524]: Snagged 64 random bytes from C:/.rnd 2005.03.24 15:03:28 LOG7[3392:2524]: Wrote 1024 new random bytes to C:/.rnd 2005.03.24 15:03:28 LOG7[3392:2524]: RAND_status claims sufficient entropy for the PRNG 2005.03.24 15:03:28 LOG6[3392:2524]: PRNG seeded successfully 2005.03.24 15:03:28 LOG7[3392:2524]: Certificate: clcert.pem 2005.03.24 15:03:28 LOG7[3392:2524]: Key file: clcert.pem 2005.03.24 15:03:28 LOG5[3392:2524]: No limit detected for the number of clients 2005.03.24 15:03:28 LOG7[3392:2524]: FD 144 in non-blocking mode 2005.03.24 15:03:28 LOG7[3392:2524]: SO_REUSEADDR option set on accept socket 2005.03.24 15:03:28 LOG7[3392:2524]: telnet bound to 0.0.0.0:23 2005.03.24 15:03:39 LOG7[3392:2524]: telnet accepted FD=148 from 127.0.0.1:2133 2005.03.24 15:03:39 LOG7[3392:2524]: FD 148 in non-blocking mode 2005.03.24 15:03:39 LOG7[3392:2524]: Creating a new thread 2005.03.24 15:03:39 LOG7[3392:2524]: New thread created 2005.03.24 15:03:39 LOG7[3392:2556]: telnet started 2005.03.24 15:03:39 LOG5[3392:2556]: telnet connected from 127.0.0.1:2133 2005.03.24 15:03:39 LOG7[3392:2556]: FD 224 in non-blocking mode 2005.03.24 15:03:39 LOG7[3392:2556]: telnet connecting 10.36.3.144:4433 2005.03.24 15:03:39 LOG7[3392:2556]: connect_wait: waiting 10 seconds 2005.03.24 15:03:39 LOG7[3392:2556]: connect_wait: connected 2005.03.24 15:03:39 LOG7[3392:2556]: Remote FD=224 initialized 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): before/connect initialization 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 write client hello A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 read server hello A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 read server certificate A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 read server certificate request A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 read server done A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 write client certificate A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 write client key exchange A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 write certificate verify A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 write change cipher spec A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 write finished A 2005.03.24 15:03:39 LOG7[3392:2556]: SSL state (connect): SSLv3 flush data 2005.03.24 15:04:11 LOG7[3392:2556]: SSL state (connect): SSLv3 read finished A 2005.03.24 15:04:11 LOG7[3392:2556]: 1 items in the session cache 2005.03.24 15:04:11 LOG7[3392:2556]: 1 client connects (SSL_connect()) 2005.03.24 15:04:11 LOG7[3392:2556]: 1 client connects that finished 2005.03.24 15:04:11 LOG7[3392:2556]: 0 client renegotiatations requested 2005.03.24 15:04:11 LOG7[3392:2556]: 0 server connects (SSL_accept()) 2005.03.24 15:04:11 LOG7[3392:2556]: 0 server connects that finished 2005.03.24 15:04:11 LOG7[3392:2556]: 0 server renegotiatiations requested 2005.03.24 15:04:11 LOG7[3392:2556]: 0 session cache hits 2005.03.24 15:04:11 LOG7[3392:2556]: 0 session cache misses 2005.03.24 15:04:11 LOG7[3392:2556]: 0 session cache timeouts 2005.03.24 15:04:11 LOG6[3392:2556]: SSL connected: new session negotiated 2005.03.24 15:04:11 LOG6[3392:2556]: Negotiated ciphers: AES256-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA1 2005.03.24 15:04:27 LOG7[3392:2556]: SSL alert (write): fatal: bad record mac 2005.03.24 15:04:27 LOG3[3392:2556]: SSL_read: 1408F455: error:1408F455:SSL routines:SSL3_GET_RECORD:decryption failed or bad record mac 2005.03.24 15:04:27 LOG5[3392:2556]: Connection reset: 17 bytes sent to SSL, 191 bytes sent to socket 2005.03.24 15:04:27 LOG7[3392:2556]: telnet finished (0 left) =============================================================================== How can I procede? Thanks&Regards Maddalena

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