[Serusers] NAT with multiple SERs

Andreas Granig andreas.granig at inode.info
Mon May 2 13:07:28 CEST 2005


Juha Heinanen wrote:
>   the other option might be to make ser-1 to send an options request to
>   uac-1 using ser-2's address in contact.
> 
> should have been "in via header".

How would you do this best?

Since the source address and the source port have to match SER-1's 
address, IMHO you can't just use an external script to perform this 
directly without SER-1, because you can't bind to SER-1's address.

If you inject the OPTIONS into SER-1 via FIFO or sipsak/sipp, the 
request goes thru, but SER-1 adds it's address as topmost Via, so the 
response always comes back to SER-1 first. Is it possible to suppress 
the insertion of the own Via-Header?

Or even better: is there a way to send the OPTIONS from inside the 
SER-Config without calling or using external scripts? Don't think so 
(beside writing a module)...

Suggestions?

Andy




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