Reverse Lookups with Forwarders

Matus UHLAR - fantomas uhlar at
Tue Jul 9 07:33:54 UTC 2013

On 09.07.13 11:51, sumsum 2000 wrote:
>I have a reverse lookup zone file configuration as follows:
>zone "0/" {
>When I do dig -x, I expect it to forward it to
>, but instead, it uses the default resolver.
> So if DNS Server X is configured against this zone
>, then any reverse DNS request for
>should be forwarded via DNS Server X

>Currently this is not the case. There is no forwarding in the above
>scenario ( where CIDR notation x.x.x.x/Mask is used)

Neither the BIND nor DNS does use the CIDR format.
the resursive resolution searches for which does
NOT belong into 0/, they are two separate names.

You would have to set up either zone or 

>Only when the zone file is changed to
>                        zone "" IN {
>All the requests for
>  is forwarded to

Use then. You should be aware that the IP range
belongs to facebook, as already noted.

Matus UHLAR - fantomas, uhlar at ;
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