[Asterisk-Users] No sound with SIP Phones on the Internet

[duncan]

>This is bull... I can't believe that...
>Must be a solution...

sip is very tricky to get working behind firewalls.  sip clients work quite 
well with nat, just make sure nat=yes is in the sip profile in sip.conf

my solution has always been to put an asterisk box behind the firewall and 
make all the sip clients connect to that, then IAX out of the firewall to 
the other machines.  i spent a few days trying unsuccessfully to find a 
decent sip proxy that worked the way i wanted and decided that the asterisk 
solution was much better.



duncan