[Asterisk-Users] Cisco 7960 nat problems.

[Rich Adamson]

Shaun wrote:
> I have a asterisk server running on site listening on a public ip.  
> Tonight I attempted to connect a Cisco 7960 phone from my home location 
> via sip but failed.  My home network is simple, Cox cable connection 
> hooked to a linksys wrt router.  The firewall on the linksys router is 
> disabled and I even setup dmz to the phones ip as a last resort.  I 
> removed the linksys router and plugged the phone directly into the cable 
> modem and now the phone can connect fine and works.  I pasted below the 
> sip debug output, anybody know what's going on or have experience with this?
>  

I have several of these working just fine. You really do need nat=yes in 
sip.conf, and, change the 7960 config to say nat=yes in the phone.