[Asterisk-Users] DNS Server Failure wreaks havoc

[Mojo with Horan & Company, LLC]

I installed a caching dns server on the * box itself 'cause when the 
external dns stopped resolving guess where my emailed voicemails went? 
Ya, I don't know either.  :P  They weren't in the mailq but showed up 
just a little while later when the names began resolving again :)

Brian Capouch wrote:
> I don't think this is a new issue--I've seen it talked about on the list 
> before.  I don't know if I've ever seen anyone post a fix.
> 
> My DNS server went out last night in a horrendous storm when an upstream 
> link went down.  The madness is that the behavior of the whole server, 
> including the part that's handling my POTS lines, gets wigged out on a 
> DNS failure, making the whole system unusable.  I have two questions; 
> being able to solve either would be wonderful:
> 
> * Is it true that if I hand-resolve the server names in all the config 
> files, and then use those instead of the hostnames, this problem won't 
> occur?  That's not exactly optimal, of course, since it defeats the 
> whole purpose of dynamic name binding.  But it's hard to explain to my 
> SOHO customers, who don't really need any IP-based functionality 
> (although I give all of them some complimentary minutes on nufone) why 
> their phones go down when the Internet is down.
> 
> * Is it true that there's no way to get applications in Linux, generally 
> speaking, to try more than a single server when doing a name resolve? 
> Only the first server listed in /etc/resolv.conf (on my systems, anyway) 
> seems to ever get consulted.
> 
> I think both of these situations are pretty serious failings, if in fact 
> they're failings in the systems and not this bedeviled cranium.
> 
> Thanks.
> 
> B.
> 
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-- 
Mojo <mojo at horanappraisals.com>
Office Manger, Horan & Company, LLC
(907) 747-6666 x112