Stunnel too many clients

Posted by davidsmalley on Server Fault See other posts from Server Fault or by davidsmalley
Published on 2010-05-06T22:45:44Z Indexed on 2010/05/06 22:48 UTC
Read the original article Hit count: 367

Filed under:

stunnel

|

haproxy

|

ssl

|

http

|

proxy

I'm trying to hook up stunnel and haproxy to forward https connections through to some backend servers.

I've got haproxy setup right, and I seem to have stunnel set up right. Trouble is that when I hit the setup with a load test after a while I start to see these log entries:

2010.05.05 11:24:43 LOG7[3498:3086792368]: https accepted FD=512 from 10.195.158.225:52579 2010.05.05 11:24:43 LOG4[3498:3086792368]: Connection rejected: too many clients (>=500)

I guess I've hit a limit somewhere but I wasn't sure how to fix it, there doesn't seem to be a config file option for stunnel to change this.

Does anyone know how to configure stunnel for a potentially large number of connections?

© Server Fault or respective owner

Related posts about stunnel

stunnel not working - stunnel.pem: No such file or directory

as seen on Server Fault - Search for 'Server Fault'
I am trying to install stunnel on an amazon LINUX machine. (i want to configure postfix so that it sends its emails through amazon ses) I first tried to install from the tar.gz package download from http://www.stunnel.org and installed with the commands: ./configure make make install but than… >>> More
Can't connect to STunnel when it's running as a service

as seen on Server Fault - Search for 'Server Fault'
I've got STunnel configured to proxy non SSL POP3 requests to GMail on port 111. This is working fine when STunnel is running as a desktop app, but when I run the STunnel service, I can't connect to port 111 on the machine (using Outlook Express for example). The Stunnel log file shows the port binding… >>> More
Can't connect to STunnel when it's running as a service

as seen on Server Fault - Search for 'Server Fault'
I've got STunnel configured to proxy non SSL POP3 requests to GMail on port 111. This is working fine when STunnel is running as a desktop app, but when I run the STunnel service, I can't connect to port 111 on the machine (using Outlook Express for example). The Stunnel log file shows the port binding… >>> More
Unknown protocol when trying to connect to remote host wit stunnel

as seen on Server Fault - Search for 'Server Fault'
I'm trying to set up a stunnel for WebDav on Windows. I want to connect 80 port on my local interface to 443 on another machine in my network. I can ping the machine remote machine. However when I use the tunnel, I'm getting this error all the time SSL state (accept): before/accept initialization SSL_accept:… >>> More
stunnel crashing

as seen on Server Fault - Search for 'Server Fault'
I'm trying to use stunnel to secure a legacy application's communications. I can't seem to get it setup and working. Can anyone provide any hints where I'm going wrong? Here's what I'm trying to accomplish: A windows service on a client machine connects to a server on port 7000 using TCP. I'd like… >>> More

Related posts about haproxy

HA Proxy Stick-table and tcp-connection configuration

as seen on Server Fault - Search for 'Server Fault'
I am using HA Proxy HA-Proxy version 1.4.18 2011/09/16 I am trying to insert the following into /etc/init.d/haproxy.cfg file # Use General Purpose Couter (gpc) 0 in SC1 as a global abuse counter # Monitors the number of request sent by an IP over a period of 10 seconds stick-table type ip size 1m… >>> More
Rotate haproxy logs

as seen on Server Fault - Search for 'Server Fault'
I tried few things but still not able to rotate haproxy logs efficiently. I need to rotate logs when log files crosses 500 MB size. Considering haproxy is serving large no. of static tcp connections, I can not restart haproxy process though a reload is doable. Daily haproxy log file size normally… >>> More
could not bind socket while haproxy restart

as seen on Server Fault - Search for 'Server Fault'
I m restarting HAproxy by following command haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -sf $(cat /var/run/haproxy.pid) but i get following message [ALERT] 183/225022 (9278) : Starting proxy appli1-rewrite: cannot bind socket [ALERT] 183/225022 (9278) : Starting proxy appli2-insert:… >>> More
Restarting Haproxy Gracefully

as seen on Server Fault - Search for 'Server Fault'
As per various blogs, HAproxy can be gracefully restarted using the following command: sudo haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -sf $(cat /var/run/haproxy.pid) TO verify this, I had set up a apache bench script which contiguously sent message to haproxy. Ideally, whenever… >>> More
HAProxy: Display a "BADREQ" | BADREQ's by the thousands

as seen on Server Fault - Search for 'Server Fault'
My HAProxy Configuration. #HA-Proxy version 1.3.22 2009/10/14 Copyright 2000-2009 Willy Tarreau <[email protected]> global maxconn 10000 spread-checks 50 user haproxy group haproxy daemon stats socket /tmp/haproxy log localhost local0 log localhost local1 notice defaults … >>> More