[Asterisk-Users] Cisco 7960 NAT question

[Ben Merrills]

I've got 4 Cisco 7960's and they're behind a firewall (sonic wall). The
asterisk box is on a WAN connection on the other end of a DS3, the
phones connect fine to the Asterisk server as you can see from the
output of show sip peers below.

tp3/tp3          <firewall-ip>     D   N      255.255.255.255  60665
Unmonitored
tp2/tp2          <firewall-ip>     D   N      255.255.255.255  60646
Unmonitored
tp1/tp1          <firewall-ip>     D   N      255.255.255.255  60649
Unmonitored

Now, the Cisco phones are set to use nat (nat = 1) and in the SIP
configuration, the phones are also configured for SIP.

[tp1]
type=friend
secret=tp1
host=dynamic
nat=yes
callerid="Test Phone 1"

I can make calls out over the phones, but can't get anything back in. If
I call voicemail say, then that's fine. But if I try and call another
phone behind the firewall, it just sits there :/

IS there a specific port range I need to open? Should I be using a
different sip config?

Cheers for any help,

Ben
www.griffin.com