[asterisk-users] asterisk 1.2.12 lost phone registrations today... why?

[Jay R. Ashworth]

On Wed, Oct 11, 2006 at 12:07:50PM -0400, Bob Chiodini wrote:
> We had a power failure that took down the internet connection and local
> DNS server.  My local Cisco phones could not register (IP addresses are
> hard-coded) and, because of the DNS failure I could not register with my
> SIP provider.  I have not had a chance to sort through the logs, but I
> had to reset the Asterisk box, after the DNS server was restored.  In my
> case, inbound and outbound PSTN calls (via a TDM11b) were failing.  The
> local analog phone rang (on an inbound PSTN call), but did not recognize
> the analog answering machine taking the line off-hook.  Once the caller
> hung up, the local (analog) phones would ring again, but no call was
> present, as reported by my wife.
> 
> BTW:  The Asterisk box is on UPS and did not go down and I do not have
> voicemail enabled for my local extensions.

As a general rule, if you aren't already, you should have your Linux
box running a local DNS server, to which everything in your net should
be pointed, and that server *should have an authoritative zone for your
local RFC 1918 network number, in both directions*.  If it does not, then
those reverse lookups that many programs generate, in trying to log
names for connections instead of numbers, will go to the outside world
before they bounce...

or they'll time out when your uplink is dead.

This may be (part of) your problem.

Cheers,
-- jra
-- 
Jay R. Ashworth                                                jra at baylink.com
Designer                          Baylink                             RFC 2100
Ashworth & Associates        The Things I Think                        '87 e24
St Petersburg FL USA      http://baylink.pitas.com             +1 727 647 1274

	"That's women for you; you divorce them, and 10 years later,
	  they stop having sex with you."  -- Jennifer Crusie; _Fast_Women_