[Asterisk-Users] 2 Sip phones behind un-natted Asterisk

[Chad Brown]

I have 2 SIP phones (Cisco 7960 & XTen) behind a NAT provided by a Linksys firewall that supports UPnP.  The Asterisk server has a public IP. Here are the problems that I am having with this configuration…   The 2 SIP phones can call MeetMe and have a conference but cannot call each other. (Yes, they connect but no audio either direction) I have verify=yes in the sip.conf for both phones. Both phones constantly go Unreachable. (However, the connection is very fast between * and sip phones) Sometimes but not always when I try to call phone1 phone2 rings.   Is this Nat messing with me or something else? In any case…Any advice out there?   Thanks, Chad