[asterisk-dev] Pinetree :: For Asterisk SIP trunks behind a SIPproxy

[Nick Lewis]

> With my new code, you can add a rule to the SIP proxy [peer] section,

> saying "don't match me, match who sent to me". The way Asterisk does  
> that, is by reading the second VIA header. This is the device that  
> sent the message to Asterisk - another proxy or an endpoint. You can  
> also be very strict and say "match last via" - which always will be  
> the other endpoint.

I support this approach to proxies for as long as the current ip 
address based matching scheme is employed. 

However I think that in the longer term no ip address based approach 
to matching is appropriate. Matching on the invite request uri 
(register contact) is the best way to distinguish incoming calls to 
different peers. Digest authentication is the best way to ensure the 
other party is as claimed.

Nick_Lewis

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