stunnel-users

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3313 discussions

Re: [stunnel-users] Stunnel 4.21 99% cpu ultilization
by Fat Wallet 30 Jun '08

30 Jun '08

Hi, Can someone please help with this issue? This 100% cpu utilization issue happens randomly on multiprocess cpu. Thanks! ----- Original Message ---- From: Fat Wallet <fat8wallet(a)yahoo.com> To: stunnel-users(a)mirt.net Sent: Monday, June 23, 2008 10:39:16 AM Subject: Stunnel 4.21 99% cpu ultilization Hi All, I've been googling for this issue but it seems like google is not my friend at the moment. I am running Linux with 4 cpus and top command shows stunnel at 99-100% cpu. Please help. //stunnel configuration file # PID is created inside chroot jail pid = /var/run/stunnel.pid # debug debug = 7 output = /var/log/stunnel.log # Authentication stuff verify = 2 cert = /etc/stunnel/cert.pem CAfile = /etc/stunnel/ca.pem #Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 # Use it for client mode client = yes /////////// stunnel version stunnel 4.21 on i686-pc-linux-gnu with OpenSSL 0.9.7a Feb 19 2003 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = 5 pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = /etc/stunnel/stunnel.pem session = 300 seconds sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none //openssl version OpenSSL 0.9.7a Feb 19 2003 //Redhat version Red Hat Linux release 9 (Shrike) root]#cat /proc/cpuinfo | grep processor | wc -l 4 http://stunnel.mirt.net/mailman/listinfo/stunnel-users

2 1

UPNP & Nat-PMP with Stunnel
by Dean Shavit 26 Jun '08

26 Jun '08

Stunnel works great for me, but with dynamic port forwarding, I've not been able to get it working. I suspect it's because stunnel is a bit confusing about which port to reply to... Anyone else found a way to crack this nut?

1 0

How do I kill stunnel?
by Grant Edwards 25 Jun '08

25 Jun '08

I've got an application that starts stunnel using equivalent of a fork/exec. The stunnel process then appears to fork off multiple copies of itself. Before the application exits, it needs to stop stunnel. I send a SIGINT to the PID that was created using the fork, but only the first "master" copy terminates -- the master stunnel process doesn't terminate its children when it exits. So I end up with a bunch of "orphaned" stunnel processes. They're not zombies, they're process that are either in state R or S (runnable or sleeping). How do I tell stunnel to not only terminate, but to terminate whatever child processes it has created? -- Grant Edwards grante Yow! Zippy's brain cells at are straining to bridge visi.com synapses ...

2 4

Stunnel config files incompatible between 4.05 and 4.21 ?
by Brian McKee 25 Jun '08

25 Jun '08

Hi All, I have a stunnel config file that works fine on an older Mandrake machine running stunnel 4.05. If I use that same config file on a new Ubuntu machine running 4.21 it just dies with "/etc/stunnel/stunnel.pem: No such file or directory" IIUC, running in client mode it doesn't need a .pem file, and I didn't create any certifcates on the Mandrake machines. Do I need to generate a cert for some reason? I've attached the config below. Brian =============================== client = yes [telnet] accept = 23 connect = some.ip.number.removed:992 [as-central] accept = 8470 connect = some.ip.number.removed:9470 [as-database] accept = 8471 connect = some.ip.number.removed:9471 [as-rmtcmd] accept = 8475 connect = some.ip.number.removed:9475

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Is the "HTTP Proxy connect" feature implemented?
by alex Wright 24 Jun '08

24 Jun '08

Hey, I'm trying to use stunnel in the following scenerio: ssh-client -> stunnel (to ssl) -> Proxy -> server(ssl to ssh). I downloaded stunnel 4.25, but I hadn't noiticed any support for this. However, in the "patches" page (http://www.stunnel.org/patches/) - three patches seem to be suitable: (connect-proxy_dunbar.patch<http://www.stunnel.org/patches/patches/connect-proxy_dunbar.patch>, connect-proxy.mwald.patch<http://www.stunnel.org/patches/patches/connect-proxy.mwald.patch>) but are for version 4.05 (whichwill probably be a pain to merge with current version). When I stumbled upon the Changelog ( http://www.stunnel.org/download/ChangeLog.txt) I noticed that version 4.15, has support for "Client mode CONNECT protocol" - which is what I need - and altough i had looked hard, I haven't found any documentation to it. So, is the above feature what I want (and if so - how do I use it?) or do I need to update the patches to the current version? Thanks in advance, Alex.

1 0

Stunnel 4.21 99% cpu ultilization
by Fat Wallet 23 Jun '08

23 Jun '08

Hi All, I've been googling for this issue but it seems like google is not my friend at the moment. I am running Linux with 4 cpus and top command shows stunnel at 99-100% cpu. Please help. //stunnel configuration file # PID is created inside chroot jail pid = /var/run/stunnel.pid # debug debug = 7 output = /var/log/stunnel.log # Authentication stuff verify = 2 cert = /etc/stunnel/cert.pem CAfile = /etc/stunnel/ca.pem #Some performance tunings socket = l:TCP_NODELAY=1 socket = r:TCP_NODELAY=1 # Use it for client mode client = yes /////////// stunnel version stunnel 4.21 on i686-pc-linux-gnu with OpenSSL 0.9.7a Feb 19 2003 Threading:PTHREAD SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP Global options debug = 5 pid = /var/run/stunnel.pid RNDbytes = 64 RNDfile = /dev/urandom RNDoverwrite = yes Service-level options cert = /etc/stunnel/stunnel.pem ciphers = ALL:!ADH:+RC4:@STRENGTH key = /etc/stunnel/stunnel.pem session = 300 seconds sslVersion = SSLv3 for client, all for server TIMEOUTbusy = 300 seconds TIMEOUTclose = 60 seconds TIMEOUTconnect = 10 seconds TIMEOUTidle = 43200 seconds verify = none //openssl version OpenSSL 0.9.7a Feb 19 2003 //Redhat version Red Hat Linux release 9 (Shrike) root]#cat /proc/cpuinfo | grep processor | wc -l 4 http://stunnel.mirt.net/mailman/listinfo/stunnel-users

1 0

Using Stunnel on Vista
by John Lallemand 18 Jun '08

18 Jun '08

We have a system that needs a TN3270 client and Stunnel to connect on XP. Currently, OnNet Host/Rumba is the most popular TN3270 client in use. But when we try these programs on Vista, the connection times out. 1) Is Stunnel Vista compatible? 2) If it is, does Stunnel need specific settings to work on Vista? Thank you! ------------------------------ John Lallemand Software Release Manager University of California, Santa Cruz

2 1

Problem with multiple stunnel jobs
by Carter Browne 17 Jun '08

17 Jun '08

A couple of days ago, I upgrade from 4.15 to 4.23 on a Linux system running Redhat 8. At the same time I went from openssl 0.9.8g to 0.9.8h. No changes were made to the configuration file. After the change, rather than starting a single process, it starts 6 processes. The process number of the lowest number process is the one that is put into the /var/run/stunnel.pid file. When I try to stop stunnel, using /etc/init.d/stunnel stop, the lowest number process is kill, and the highest number process seems to be running continuously - although it is not a hard cpu loop, but it keeps on accumulating run time. The number of processes may not be a new phenomenon, but the inability to kill itself is. I normally restart the stunnel on a daily basis to keep the log files manageable, but with this new behavior, the /etc/init.d/strunnel restart command fails because the ports are still in use. Any ideas on how to fix this problem. Thanks, Carter -- Carter Browne CBCS cbrowne(a)cbcs-usa.com 781-721-2890

2 1

Goldmine 8 & Advisormail SSL problems
by Stephen E. Rischall 17 Jun '08

17 Jun '08

1 0

stunnel service problems...
by Jeremy Paje 10 Jun '08

10 Jun '08

Has anyone had any problems with the windows stunnel service not starting automatically? We install stunnel as a service (stunnel.exe -install) We've had it previously installed on 600+ machines with no problems, but recently (noticed on slower machines running XP) the stunnel service does not start...but it happens randomly only on slower machines. The following errors are in the event log... Timeout (30000 milliseconds) waiting for the stunnel service to connect. (Event ID ID 7009) AND The stunnel service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion. (Event ID 7000) I've tried setting the service to restart if failed, and to delay 2 minutes before restart, etc with no luck. If you start the stunnel manually all is well, it just doesn't start on bootup. Any suggestions? Thanks JP

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