A question about using forwarders.

[Merton Campbell Crockett]

The "forward first;" and "forward only:" statements control this DNS
behaviour.  The "forward only;" statement restricts DNS queries to the 
sysems listed in forwarders.  The "forward first;" statement allows the 
root name servers to be queried after the forwarders.  If either of your 
forwarders returns an authoritative NXDOMAIN no further queries will be 
made.

Merton Campbell Crockett


On Thu, 8 Dec 2005, Lee Fu-yuan wrote:

> Hi everyone,
> 
> I have a question about the usage of the forwarder options.
> Consider a simple setting: 
> 	
> 	options {
> 		....
> 		....
> 		forwarders {IP_ADDRESS1; IP_ADDRESS2;};
> 		....
> 	};
> 
> Is it possbile that we can ask the DNS server to query the 
> second forwarder with IP_ADDRESS2 if the first forwarder 
> answers our query with NXDOMAIN message? 
> 
> 
> Similarly, if none of the forwarders have the answer, i.e.,
> they all answers NXDOMAIN, can we let the DNS server perform 
> interative query from root DNS servers?
> 
> Thanks a lot.
> 
> With best regards,
> 
> 
> 

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