> I have asterisk running on a public ip and a client running behind a
natting
> firewall with a Grandstream bt-100.Is there something special I should do
to
> get it working,I got other users working using "host=dynamic" in
sip.conf
There are many answers to this in the list, it comes up all the time.
Check the usual sources like the wiki:
http://www.voip-info.org/wiki-Asterisk+SIP+NAT+solutions
You will need to forward SIP port 5060 tot he phone and probably some RTP ports
Another solution:
http://www.google.com/search?q=sip+asterisk+nat+forward