Re: [OpenSIPStack] OpenSBC behind NAT/router

[Joegen E. B. <jb...@so...>]

openSBc isn't really made for this setup.   OpenSBC is intended to be 
used either as a bridge between multi-homed networks or as a far end NAT 
traversal server.  These two setup requires that OpenSBC itself is not 
the subject of NAT. 

You may try "Static RTP Media Address" in the general parameters 
config.  Set the value to the public address of your NAT router.    As 
for the port number, OpenSBC starts at 30000 onwards for RTP and no, 
there isn't any provision to set the port range.  This however can 
easily be achieved with some code modification.  Let me know if you want 
to stretch it a bit further.