Forwarding Requests to an External Name Server
Mark Andrews
Mark_Andrews at isc.org
Tue Jun 6 03:34:49 UTC 2006
> I have several internal name servers are that still running BIND
> 8.3.7-REL running under BSD/OS 4.3.1. Normally, this version of BIND
> behaves the same as BIND 9.3.x that is running on various Linux
> systems and appears to be a little more robust.
>
> The BIND 8.3.7-REL systems are internal master name servers that
> function as name servers of last resort for all internal name
> servers. If they cannot answer the DNS query locally, they are
> configured to forward all DNS queries to an external name server.
> The global section of named.conf has both forwarders {...}; and
> forward only; statements.
>
> Over the weekend, one of the internal servers began forwarding
> queries for an internal-only zone to the external name server
> although it had a valid copy of the internal zone. What can cause
> this to happen?
If the zone has expired it will do this if I remember
correctly. Similarly if a reload of the zone fails for
some reason.
Note 8.3.7-REL has bugs which are fixed in 8.4.7-REL.
> To clear the problem, I had to stop the name server and then restart
> it. This is unusual as we, typically, only stop and restart BIND is
> when we change versions of BIND or apply a patch to the operating
> system.
>
> Merton Campbell Crockett
> m.c.crockett at adelphia.net
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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