[asterisk-users] SIP Extensions and loss of Internet connection

[Alec Davis]

A DNS cache on your asterisk box may be the answer.

Google Asterisk DNS Cache, many hits.



> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Alejandro Imass
> Sent: Tuesday, 23 November 2010 6:18 a.m.
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [asterisk-users] SIP Extensions and loss of 
> Internet connection
> 
> On Mon, Nov 22, 2010 at 11:44 AM, Daniel Bareiro 
> <daniel-listas at gmx.net> wrote:
> > Hi, Alejandro.
> >
> >> > A few days I have problems connecting to the Internet on my house
> [...]
> > It would appear that the server for some reason was 'locked'. For 
> > example, when I try to register from Twinkle softphone, I get the
> > following:
> >
> > -----------------------------------------------------------------
> > lun 13:41:56
> > Daniel, registration failed: 503 Service Unavailable
> > -----------------------------------------------------------------
> >
> >
> 
> I have had a similar problem when we have some sort of 
> network disruption, but it _never_ affects clients on the 
> LAN, it only affects my SIP registrations on the public 
> network. I have 2 NICs one on the public network with a 
> public IP (but dynamic), and one on the LAN. I also have a 
> cron to a dyndns service that updates the name of  this 
> server so other PBX can register to it.
> 
> Anyway, sometimes, but very rare, something happens and the 
> is no way that it re-registers to external SIP sources, and 
> no other external SIP can register with it either. Nothing 
> works except to reboot the server a-la Windoze. I have 
> Asterisk 1.6 on FreeBSD 8. I have always attributed this 
> problem to my set-up or a quirky NIC but maybe it's related 
> to your problem (although it has _never_ happened to us in 
> the LAN extensions). Unable to find a solution, and since 
> it's really very rare, we have test calls every day to make 
> sure everything is working
> ;-)
> 
> Best,
> Alejandro Imass
> 
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