[Users] Authentication in Trunk-Mode

[Klaus Darilion]

Martin Klisch wrote:
>> I think Asterisk supports all of them except TLS.
>>
>> btw: if you use IP based authentication do not use UDP (as it can be
>> spoofed easily)
> 
> That's my problem. We want to use standard SIP trunk (via UDP) to connect
> different PBX's and other carriers. So we cant use something, that isnt
> rfc conform. at the moment we put a cisco router in front of a pbx and
> build a tunnel to our ser. this is an expensive solution. anyone knows
> other ways to do it?


Who authenticates who? Does the PBX authenticate or does openser 
authenticate?

klaus