Forwarding Requests to an External Name Server

The Doctor doctor at
Tue Jun 6 15:23:47 UTC 2006

In article <e62thq$m9l$1 at>,
Mark Andrews  <Mark_Andrews at> wrote:
>> 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
>Mark Andrews, ISC
>1 Seymour St., Dundas Valley, NSW 2117, Australia
>PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at

I am using Bind 9.X current on BSD/OS 4.3.1 .

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