To help clearify for those that don't have a good understanding of the
tcp-ip protocol, consider this:
- sip and rtp use the udp protocol (not tcp)
- all sip boxes (regardless of whether the box is a phone or *) _listen_
on udp port 5060. (What udp port is used as the _source_ port when
up asterisk for one
user in private ipNAT.
that isn't quite how ports work.. True, asterisk listens for
udp connections on 5060. But the softphone won't make its
outgoing connection on 5060. The OS will automatically choose
an unused port number for the outgoing connection. So
