[Asterisk-Users] A solution for SIP and NAT

[Andrew Radke]

Klaus Darilion wrote:
[snip]
>>The project can be found at http://sarp.sourceforge.net/
> 
> 
> There is also a similar project called siproxd:
> http://sourceforge.net/projects/siproxd/
> 
> regards,
> klaus

It has a broadly similar goal on the surface but a very very different 
approach. siproxd relies on a large library. It tries to be completely 
SIP compliant (you can't be compliant and handle NAT). It leaves 
outgoing RTP traffic to go direct with inbound coming to it. It requires 
ports to be forwarded to it/opened for incoming RTP traffic (SaRP 
doesn't). It doesn't consider security. And lastly myself and a number 
of other people just haven't seen it work.

There are a couple of us that now actually use SaRP to develop SaRP (the 
old the compiler can compile itself test :-). It handles any sort of NAT 
that can get the SIP port to it (5060 or whatever else you want). It 
drops any packets that don't make sense and logs them; don't reply 
unless you understand a packet or you are just giving away information 
about your network or opening yourself up to an attack. And it's 
cross-platform. There is no way you'll get siproxd to run on Windows for 
example.

I'm not taking anything away from siproxd, I'm just stating why I don't 
use it and why I don't know anyone who does.

Regards,

Andrew Radke