Is it possible to forward dns queries if unable to contact a DNS server?

Dawn Connelly dawn.connelly at
Thu Mar 29 05:01:28 UTC 2007

You can set up a specific zone to forward to specific servers. Not a great
solution but will work if you have a DNS server you know is able to make the
zone "" {
        type forward;
        forwarders {;; };
Are you able to do an outbound NAT to a different IP range? Make it look
like your DNS server is coming for a non former bogus IP range. Not sure if
you can make the routing work on your network and whatnot, but that would be
a different way of addresses the problem...and it would make sure that you
don't have to manually create forwarders per domain. That would be time
consuming and not a very effective solution.  The other option would be to
set up a forward only configuration so all queries are forwarded to DNS
servers that you know will get the answers for you.

forward ( only );
forwarders {;; };

On 3/28/07, Paul England <Pengland at> wrote:
> Hi there,
> I have a strange issue based upon the fact that our IPv4 name space was
> once included on old Bogons lists.
> (I'm sure that you all know what that is however - "Bogons is the name
> used to describe ip blocks not allocated by IANA and RIRs to ISPs and
> organizations plus all other ip blocks that are reserved for private or
> special use by RFCs (the actual term "bogons" comes from word "bogus", as in
> bogus ip announcements).")
> Occasionally we encounter DNS servers which are configured with an
> out-dated Bogon list and we are unable to resolve any of their domains,
> Is it possible to configure bind to forward dns requests which it cannot
> resolve to another DNS server?
> Any help would be greatly appreciated,
> Thank you,
> Paul England
> Auckland, New Zealand

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