stunnel-users

3 participants
3308 discussions

multiple stunnel client
by Manila, Dinesh - Contractor 15 Feb '05

15 Feb '05

Hi, I am working in a project, whereas the EMS application need to be secured while communicating with NE. To make it secure, we have decided to go with stunnel and openSSL. I have following questions while using stunnel in my application: 1. I read that stunnel limits the number of clients to be connected to 125. Can I increase this number. If so, by increasing this number, what is the implication in performance of stuunel. 2. Since my EMS is capable of managing more than 1000 NEs, I would want to have multiple stunnel client running on the same workstation. Is this possible to have multiple stuunel process running on the same server. if so, how should my stunnle.conf file look like. I appreciate greatly, If I could get the answers for the above queries. Thanks and Regards, Dinesh Wipro Technologies. Bangalore.

2 1

Multiple listeners with just one instance of Stunnel?
by Michael Zarlenga 15 Feb '05

15 Feb '05

It doesn't seem possible to start 1 instance of Stunnel for multiple accept ports. Judging by the format of the Stunnel configuration file, it seems that I need to 1 instance of Stunnel for each port that accepts connections from the outside world. Is this true?

3 6

HELP!!! Problem uploading files
by Bhavesh Patel 14 Feb '05

14 Feb '05

Hi all, I'm using stunnel verstion 4.05 and openssl 0.9.7d. When trying to upload a large file say 1Meg I always get the following: 2005.01.27 14:30:40 LOG7[72667165:0]: stunnel accepted FD=0 from 136.157.232.120:3372 2005.01.27 14:30:40 LOG7[72667165:0]: FD 0 in non-blocking mode 2005.01.27 14:30:40 LOG7[79306780:0]: stunnel started 2005.01.27 14:30:40 LOG5[79306780:0]: stunnel connected from 136.157.232.120:3372 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): before/accept initialization 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): SSLv2 read client hello A 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): SSLv2 write server hello A 2005.01.27 14:30:40 LOG7[79306780:0]: waitforsocket: FD=0, DIR=read 2005.01.27 14:30:40 LOG7[79306780:0]: waitforsocket: ok 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): SSLv2 read client master key A 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): SSLv2 server start encryption 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): SSLv2 write server verify A 2005.01.27 14:30:40 LOG7[79306780:0]: waitforsocket: FD=0, DIR=read 2005.01.27 14:30:40 LOG7[79306780:0]: waitforsocket: ok 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): SSLv2 read client finished A 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): SSLv2 write request certificate A 2005.01.27 14:30:40 LOG7[79306780:0]: SSL state (accept): SSLv2 write server finished A 2005.01.27 14:30:40 LOG7[79306780:0]: 1 items in the session cache 2005.01.27 14:30:40 LOG7[79306780:0]: 0 client connects (SSL_connect()) 2005.01.27 14:30:40 LOG7[79306780:0]: 0 client connects that finished 2005.01.27 14:30:40 LOG7[79306780:0]: 0 client renegotiatations requested 2005.01.27 14:30:40 LOG7[79306780:0]: 1 server connects (SSL_accept()) 2005.01.27 14:30:40 LOG7[79306780:0]: 1 server connects that finished 2005.01.27 14:30:40 LOG7[79306780:0]: 0 server renegotiatiations requested 2005.01.27 14:30:40 LOG7[79306780:0]: 0 session cache hits 2005.01.27 14:30:40 LOG7[79306780:0]: 1 session cache misses 2005.01.27 14:30:40 LOG7[79306780:0]: 0 session cache timeouts 2005.01.27 14:30:40 LOG6[79306780:0]: Negotiated ciphers: DES-CBC3-MD5 SSLv2 Kx=RSA Au=RSA Enc=3DES(168 ) Mac=MD5 2005.01.27 14:30:40 LOG7[79306780:0]: FD 1 in non-blocking mode 2005.01.27 14:30:40 LOG7[79306780:0]: stunnel connecting 127.0.0.1:80 2005.01.27 14:30:40 LOG7[79306780:0]: remote connect #1: EINPROGRESS: retrying 2005.01.27 14:30:40 LOG7[79306780:0]: waitforsocket: FD=1, DIR=write 2005.01.27 14:30:40 LOG7[79306780:0]: waitforsocket: ok 2005.01.27 14:30:40 LOG7[79306780:0]: Remote FD=1 initialized 2005.01.27 14:30:40 LOG7[79306780:0]: SSL_read returned WANT_: retrying 2005.01.27 14:30:40 LOG7[79306780:0]: SSL closed on SSL_write 2005.01.27 14:30:40 LOG5[79306780:0]: Connection closed: 0 bytes sent to SSL, 668 bytes sent to socket 2005.01.27 14:30:40 LOG7[79306780:0]: removing pid file /usr/local/var/run/stunnel.pid 2005.01.27 14:30:40 LOG7[72667165:0]: Process 79306780 finished with code 0 (0 left) Specifically: I get SSL_read returned WANT_: retrying I am using sslv2 because sslV3 does not work with windows explorer. Any help would be appreciated. __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail

2 1

using no certificate
by Zohar 14 Feb '05

14 Feb '05

Hi, I'm very new to all this issue of SSL, so I apologize if this question sounds stupid. I currently have a server that listens to connections on a TCP port. Clients that connect to it may do so using SSL v3 (mobile clients, which use their own SSL packages, so I have very little control over it). I want to add stunnel to my server's setting, to enable SSL communication. I have no need for the client to authenticate the server, I am only interested in the data being encrypted. I tried setting this up, but the client complains that my server certificate cannot be authenticated (I produced it using http://www.stunnel.org/pem/). Any pointers on how to set such a thing up (even for the time being, while I develop), without having to pay lots of money to a CA ?

3 2

Multiple Instances of stunnel
by dps_maillists＠mac.com 11 Feb '05

11 Feb '05

Hi everyone; Is it possible to run multiple instances of stunnel (v 4.07) in client mode on a single machine? We sould like to use stunnel to secure connections from a small number of client applications (1 to 10) connecting to a larger number of server applications (200 per client app). Ideally, we would like to use one instance of stunnel per client. Many thanks in advance. Doug

2 1

connect_wait: s_poll_wait timeout
by Alexander Lazic 07 Feb '05

07 Feb '05

Hi, we run stunnel on an solaris 9 with unlimited FD. Today we get the follwing error: connect_wait: s_poll_wait timeout With 'top' we see ~190-~220 threads and the client can't connect to our site. our config is: --- cert = /usr/local/apache/our.pem setuid = stunnel setgid = apache options = ALL pid = /usr/local/apache/logs/stunnel_netbanking.pid ciphers = ALL:!EXP1024-DHE-DSS-RC4-SHA:!EXP1024-RC4-SHA:!EXP1024-DHE-DSS-DES-CBC-SHA:!EXP1024-DES-CBC-SHA:!EXP1024-RC2-CBC-MD5:!EXP1024-RC4-MD5:!ADH:!EXP56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL:@STRENGTH debug = 6 output = /usr/local/apache/logs/stunnel_netbanking.log [https] accept = 10.3.169.208:443 connect = 10.3.169.208:10800 TIMEOUTclose = 0 xforwardedfor = yes --- stunnel 4.07 on sparc-sun-solaris2.9 PTHREAD+POLL+IPv4 with OpenSSL 0.9.7d 17 Mar 2004 PRNG seeded successfully file ulimit = 2147483647 (can be changed with 'ulimit -n') poll() used - no FD_SETSIZE limit for file descriptors 8388607 clients allowed --- Please can you help us to solve the problem. thx al ;-)

2 1

Problem downloading large files with sslv2
by Bhavesh Patel 04 Feb '05

04 Feb '05

Hi, I'm trying to download files from Internet Explorer using sslv2 and I keep getting the following message: 2005.02.04 16:45:04 LOG7[8237077:0]: FD 1 in non-blocking mode 2005.02.04 16:45:04 LOG7[8237077:0]: stunnel connecting 127.0.0.1:80 2005.02.04 16:45:04 LOG7[8237077:0]: remote connect #1: EINPROGRESS: retrying 2005.02.04 16:45:04 LOG7[8237077:0]: waitforsocket: FD=1, DIR=write 2005.02.04 16:45:04 LOG7[8237077:0]: waitforsocket: ok 2005.02.04 16:45:04 LOG7[8237077:0]: Remote FD=1 initialized 2005.02.04 16:45:04 LOG7[8237077:0]: SSL_read returned WANT_: retrying 2005.02.04 16:45:04 LOG7[8237077:0]: SSL closed on SSL_write 2005.02.04 16:45:04 LOG5[8237077:0]: Connection closed: 0 bytes sent to SSL, 669 bytes 2005.02.04 16:45:04 LOG7[8237077:0]: removing pid file /usr/local/var/run/stunnel.pid 2005.02.04 16:45:04 LOG7[2375710:0]: Process 8237077 finished with code 0 (0 left) Also does anyone know if that 10 TIMEOUTconnect for IE really works? Thanks, Bhavesh

1 0

concurrency request
by kevin 01 Feb '05

01 Feb '05

hi, I've recently set up stunnel for SSL connect. When I test its performance with siege with 700 concurrency request, I got this log: "Error: socket: connection timed out.: Operation now in progress" So, may I ask what is the upper limit of concurrency in stunnel, if the performance of the machine is good enough. and how can I increase the concurrency upper limit. thanks

2 1

Q: rereading configuration file?
by Heiko Nardmann 01 Feb '05

01 Feb '05

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi! Does stunnel offer a way to signal a need for rereading the configuration file, i.e. some kind of SIGHUP ? I would like to add services while running stunnel without stopping the program ... it should compare currently available services with the new list of services, stop the ones not available any more and start those which are new in the new/changed configuration ... - -- Heiko Nardmann (Dipl.-Ing. Technische Informatik) secunet Security Networks AG - Sicherheit in Netzwerken (www.secunet.de), Weidenauer Str. 223-225, D-57076 Siegen Tel. : +49 271 48950-13, Fax : +49 271 48950-50 Besuchen Sie uns vom 10. - 16. März auf der CeBIT 2005 in Halle 7, Stand D38. Informationen zu unseren CeBIT-Themen finden Sie unter www.secunet.com <outbind://44/www.secunet.com> - wir freuen uns auf das Gespräch mit Ihnen. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFB/4Dzpm53PRScYygRAtg4AJ9Ku/8xfufFdrLq7cz2+1GDjrcvyQCffVLw v/2D0Fd8UtTHpssq7cgc71Y= =uG2t -----END PGP SIGNATURE-----

3 2

Q: error message during startup?
by Heiko Nardmann 01 Feb '05

01 Feb '05

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi! I just got the following stunnel error message in my syslog: File descriptor out of range (1024>=1024) The reason is that I have tried to let stunnel create 2000 services. But where do I change the maximum for this range? (Linux) Kernel? Or stunnel? Thanks in advance! PS: I already changed ulimit to 4000. - -- Heiko Nardmann (Dipl.-Ing. Technische Informatik) secunet Security Networks AG - Sicherheit in Netzwerken (www.secunet.de), Weidenauer Str. 223-225, D-57076 Siegen Tel. : +49 271 48950-13, Fax : +49 271 48950-50 Besuchen Sie uns vom 10. - 16. März auf der CeBIT 2005 in Halle 7, Stand D38. Informationen zu unseren CeBIT-Themen finden Sie unter www.secunet.com <outbind://44/www.secunet.com> - wir freuen uns auf das Gespräch mit Ihnen. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFB/4TWpm53PRScYygRAv2JAKCHTe6zNvhmWAkypK5xymm+LWstEACgt1vJ vSNr7eeFXUpRFCu2SiY/4ls= =huyB -----END PGP SIGNATURE-----

2 1

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stunnel-users