[asterisk-users] Re: SIP fails when internet connection lost.

[Martin Joseph]

On 2006-10-11 03:22:00 -0700, Thomas Kenyon <digium at 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