[Freeswitch-users] Rewriting media address in SDP as well as contact IP/port

[Ken Rice]

IIRC freeswitch has never re-written this... In bypass media mode FreeSWITCH
can not accurately re-write the SDP for the RTP, it doesn't know what PORT
the NAT device is going to expose the RTP port on...

NAT devices have a bad habit of translating ports from whatever the host
behind them says to something completely different...

To handle this, FreeSWITCH adjusts media on the fly to send media back to
where it came from....


On 11/20/12 2:35 PM, "PhilQ" <philq at qsystemsengineering.com> wrote:

> We're running in bypass media mode with aggressive-nat-detection enabled.  FS
> handles the signaling but passes the internal 10.x.x.x addresses for media
> along unchanged, even between different sites.
> 
> Any recommendations for SIP proxies if FS can't do it automatically?
> Rewriting the SDP from the dialplan might be worth looking into depending
> upon how it's implemented.
> 
> Thanks for the info.
> 
> - Phil
> 
> 
> 
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-- 
Ken
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