[stunnel-users] stunnel maximum clients to server

bruce bushby bruce.bushby at gmail.com
Mon Mar 14 22:08:50 CET 2011


I'm about to add stunnel to my buildroot embedded project (ARM926EJ-S) and I
was hoping the list could answer a few performance questions?

I've been looking for a way to encrypt the connections between my embedded
units and my server. From what I understood about openvpn, the server
starts to give problems beyond 1024 "concurrent sessions" .... I'm looking
at a design that can handle 4K concurrent sessions....although it'll take a
years to get that big.

My embedded devices have a GSM modem and setup a ppp0 interface over gprs.
I'm considering stunnel in the hope that I could have up to 3000 stunnel
coming into my servers. I say 3K because by the tike I reach this figure I
hope to have implemented better switches and off load the overhead of the
encrypted connection to
the switch.

The requirement is that the embedded "non-ssl aware client" will be able to
communicate with the server over a secure tunnel.

Am I completely on the wrong road? .... could stunnel cater for something
like this?

Thanks in advance!
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