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I remember asking Michael Trojnara a similar question -- what version are you running and how much memory is in your EC2 instance?<div><br></div><div>I think he said you would need about 4g to properly allow for 1000 connections, and I could have sworn that in a version of 4.4 the connection limit went up to 64k</div><div><br></div><div><br><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">Date: Thu, 28 Jun 2012 17:50:09 -0400<br>From: tashburn@gmail.com<br>To: stunnel-users@stunnel.org<br>Subject: [stunnel-users] more than 1000 concurrent connections?<br><br><div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">
Hi There -</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">
I'd like to use stunnel as the SSL termination point for a bunch of persistent TCP connections.</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)"><br></div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">I'm running it on an EC2 instance and it's only allowing me about 1000 concurrent connections. It doesn't matter if the connections come from one client IP or two.</div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">
How can I raise this limit?</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">
I've already raised the OS tcp connection limit with ulimit and it doesn't improve things.</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)"><br></div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">Thanks,</div></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">
<br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px;background-color:rgb(255,255,255)">T</div>
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