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 From:  Tim Nelson <tnelson at rockbochs dot com>
 To:  Chuck Mariotti <cmariotti at xunity dot com>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Hundreds of VPN Connections.
 Date:  Fri, 17 Nov 2006 16:38:49 -0600
Technically, it is possible to increase the number of connections 
monowall will handle for VPNs. However, there may be limitations to the 
underlying architecture/daemon itself which might prevent you from doing 
this. Obviously, for such a setup, an embedded device like a Soekris or 
hacked Nokia will not work. You would need something with a fast CPU, 
good amounts of RAM, good nics, etc.

Another thing you may wish to keep in mind with voip and vpns is 
latency. I've noticed a varying amount of latency added to a connection 
through vpn. Sometimes, it is only as little as 50ms, other times it is 
as much as 150-200ms which may seriously impact your performance 
depending on which voip protocol you choose. Also, overseas connections 
may traverse some sort of satellite link which I have found to be almost 
certainly unusable.

Tim Nelson
Technical Consultant
Rockbochs Inc.

Chuck Mariotti wrote:
> I have a project where I would like to make several hundreds (maybe
> thousands) of VPN connections from clients over-seas to a network here
> in Canada. The VPN connections need to be capped to only allow VoIP over
> specific ports.
> Any suggestions on how to do this (maybe an offshoot of mono?), what
> open source might work or how much it might cost me?
> Regards,
> Chuck 
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