Forwarding DNS queries for all but some domains

[Chris Thompson]

On Sep 11 2006, Ramprasad wrote:

>Hi 
>  I want to forward all DNS queries from my caching-nameserver to
>another server. But there are are some domains which have to be server
>locally , via rbldnsd
>
>for-eg 
> sbl-xbl.spamhaus.org  ==> forward to rbldnsserver port 530;
> list.dsbl.org         ==> forward to rbldnsserver port 530;
> *                     ==> forward to primary nameserver;   
>
>How do I achieve this ? 

options { ...
    forward only;
    forwarders { <ip.of.primary.nameserver>; };
    ... };
...
zone "sbl-xbl.spamhaus.org" {
    type forward; forward only;  
    forwarders { <ip.of.rbldns.server> port 530; };
    };
zone "list.dsbl.org" {
    type forward; forward only;
    forwarders { <ip.of.rbldns.server> port 530; };
    };

Depending on your exact requirements, you might be able to use 
"forward first" rather than "forward only" in some places.

-- 
Chris Thompson
Email: cet1 at cam.ac.uk