[Asterisk-Users] Cisco 7960 NAT question

[Rich Adamson]

> 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?

The sonicwall has a user selectable option to support sip. Have you tried
to enable it? (Don't know how well that actually works, never tested it.)