[asterisk-users] Asterisk dies when external access is lost

[Geraint Lee]

just an idea, could it have something to do with DNS being unavailable, but
that wouldn't really explain why it would die when ADSL is down... hmmmm.

Cheers

Geraint

2008/12/11 Phil Knighton <phil.knighton at mjog.com>

>  Hello
>
> Looking for some help with a rather odd problem.  We have Asterisk 1.4.10
> running on a Linux box, within our Windows domain.  Our Domain Controller is
> a Windows 2003 server, providing the normal Windows domain functions, such
> as DHCP and DNS.
>
> When we lose either our Domain Controller (for a reboot/maintenance) or
> external ADSL access, Asterisk drops all SIP registrations - even internal
> SIP calls within the building no longer function.
>
> All of our SIP clients are assigned static IP addresses, and our incoming
> lines are via a Zaptel card using (currently) analog lines from our national
> telco.  When the SIP registrations drop, Asterisk will still answer incoming
> calls via the Zap channels, but can't forward them anywhere.
>
> What is most confusing is a recent issue when our ADSL connections were all
> offline, and despite everything internal to the network working perfectly,
> all of the SIP phones stopped working and left us without phones for 4
> hours.
>
> I'm suspecting that these two issues (losing connectivity when DC is
> unavailable and losing connectivity when ADSL drops) are related, but I
> can't figure out how?  I'm sure I'm missing something simple in the config,
> but I've been tinkering with this issue since we were using Asterisk 1.2 and
> I've still not resolved it.
>
> Any help or comments would be appreciated...
>
> Thanks in advance
>
> Phil
>
>
> Phil Knighton
>
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