[Freeswitch-users] Wrong IP on ACK?

Brian West brian at freeswitch.org
Tue Nov 4 09:45:05 PST 2008

You can use the param "NDLB-force-rport" to force it to use rport no  
matter what.


On Nov 4, 2008, at 11:43 AM, David Aldworth wrote:

> Hi bkw -
> We did that and it does indeed fix the issue. However, in the case
> that you have multiple SIP UA's behind a router there tend to be many
> dynamically generated ports in use. The obvious solution would be to
> statically map a port to an internal IP and then set the externip and
> localhost settings. I agree, this would work. Except if you are using
> a dsl or cable modem provider that also like to update your WAN ip on
> a regular basis. But what confuses me more is that all the sip
> messaging works fine right up until the ACK we send back to the 200
> OK. Obviously FS is sending the ACK to the Contact field IP but is
> there a way in FS to tell it to just respond on the IP and port that
> the 200 OK came from? I thought that is what the force rport setting
> did but i guess it does not.
> David

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