asterisk users - Oct 2006 - SIP fails when internet connection lost.

I have been seeing this problem for a long time and it occurs in 1.4.0b2 
(as well as 1.2.0-1.2.12.1).

If the internet connection is lost and I have SIP services that require 
me to register, any SIP devices attached to the system stop working.

I have an IAX phone connected to one of my servers that I've been having 
this problem with which will work fine (and filover to the PSTN) the 
problem is that SIP handsets and softphones can no longer register or 
make calls.

Is this normal behaviour or have I got something wrong with each server?

On 2006-10-11 03:22:00 -0700, Thomas Kenyon <digium@sanguinarius.co.uk>
said:
> I have been seeing this problem for a long time and it occurs in 
> 1.4.0b2 (as well as 1.2.0-1.2.12.1).
> 
> If the internet connection is lost and I have SIP services that require 
> me to register, any SIP devices attached to the system stop working.
> 
> I have an IAX phone connected to one of my servers that I've been 
> having this problem with which will work fine (and filover to the PSTN) 
> the problem is that SIP handsets and softphones can no longer register 
> or make calls.
> 
> Is this normal behaviour or have I got something wrong with each server?
I think this was recently discussed and a likely issue is the lack of a 
fully qualified domain name for you servers.

Try searching the list  archives for "hosts".

Basically if the server box tries to resolve itself via the network you 
have a problem.

HTH,
Marty