[Asterisk-Dev] Configurable 'Proxy Require' Parameter?

[Olle E. Johansson]

Jeremy Thorson wrote:

> I have been trying to get Asterisk to work as a client with a SIP call
> server which uses a proprietary NAT Transversal method.  In order to
> take advantage of the NAT transversal intelligence in the call server,
> I need to be able to send a configurable Proxy-Require: line within
> the SIP Register message to the call server to identify that my
> Asterisk server requires the NAT transversal intelligence applied.
> 
> My question is whether there is any way with the current builds to
> configure additional SIP headers in outgoing SIP messages on a
> per-destination basis ... and if not, how difficult would this type of
> feature be to implement?

Interesting. Which phone do send the Proxy-Require: header in a
registration message today? SInce the server requires this
header, there must be an implementation out there.

No, currently there's no way to add a SIP header to registration.
In chan_sip2, you can add headers to an INVITE, but that will not
solve your problem.

/Olle