[Asterisk-Users] sip show peers - disappearing

[Jonathan Tew]

We have people connecting to an asterisk box over the internet.  They're 
using the x-lite client behind linksys firewalls.   The X-Lite client 
discovers the firewall no problem and connects to Asterisk without a 
problem.  After connecting the agent shows up properly in "sip show 
peers" with the IP address of their firewall, etc.  They can receive 
calls no problem.  After some time goes by... they don't show as 
registered with * any more in the sip show peers.  They can still make 
outbound calls, but can not receive the inbound ones.  Anyone have any 
ideas on this one?

Thanks,
Jonathan