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

Uriel Carrasquilla uriel at adelphia.net
Mon Oct 13 20:14:53 MST 2003


Dunca:
I am not sure I understand your statemnet.
SIP devices (UA) on the other side of the Internet behnid a NAT communicate
to * on the public Internet.  Then this Asterisk connects to other Asterisks
(via IAX) that can be behind Firwalls (or NATS).  am I understanding
correctly?
Uriel

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com]On Behalf Of duncan
Sent: Monday, October 13, 2003 12:25 PM
To: asterisk-users at lists.digium.com
Subject: RE: [Asterisk-Users] No sound with SIP Phones on the Internet



>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

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