[Blink] Blink over VPN using the wrong ip address in headers

Dan Pascu dan at ag-projects.com
Mon May 16 11:21:05 CEST 2011

On 12 May 2011, at 1:46, Christian Kujau wrote:

>> When using UDP, if rport is not used responses are routed back to the source
>> address and the port in the topmost Via header. Since this may cause trouble
>> with NATs, if rport is being used, responses will be routed to the source IP
>> and port from which the request originated.
> So, if I parse this correctly, the SIP server needs to do some magic?

The server doesn't need to do any 'magic'. It just needs to support a NAT traversal mechanism (rport) which is described in the RFC. Once the client added the rport parameter, the server must honor it.


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