Named server fails to respond

[Barry Margolin]

In article <dtj3ag$2dh4$1 at sf1.isc.org>, etieseler at gmail.com wrote:

> Hello list,
> 
> I have been getting stumped with my current issue.  I have a BIND
> (9.2.4) server running on Redhat EL3.0.  It works most of the time, but
> every now and again it fails to handle DNS requests.  While this is
> happening I issue the following command on the DNS server:
> 
> #dig -t ANY maps4.rapmls.com @127.0.01
> ;; global options:  printcmd
> ;; connection timed out; no servers could be reached
> 
> I check with netstat and port 53 is listening on both the loopback and
> the IP address of the server for both UPD and TCP.
> 
> I have disabled iptables and even went as far as to remove it entirely,
> and the behavior has not changed.
> 
> After a few minutes it starts to handle requests again.  I am stumped!
> The load on the server is minimal, looking through the log files with
> debug level 3 does not reveal anything obvious (What should I look
> for?)  This is an internal DNS server that does recursion.  It recieves
> no requests from the Internet.  I have setup DNS on another server but
> would like to get this resolved.  Any thoughts?  I will be happy to
> provide further information if needed.

When you turn on tracing, what do you see while it's not responding?

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
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