a exemple of conf file for a subnet ?

[Kevin Darcy]

Phibee Noc wrote:

>Hi
>Anyone have a exemple of named.conf and zone file for the ip reverse ARPA
>of a subnet /26 ?
>
In your ISP's /24 reverse zone (assuming they run BIND):

$GENERATE 1-62 $ CNAME $.vlan1.rev.example.com.

In your vlan1.rev.example.com, rev.example.com or example.com zone 
(depending on how your forward namespace is delegated):

1.vlan1.rev.example.com. PTR alpha.example.com.
2.vlan1.rev.example.com. PTR beta.example.com.
(and so forth...)

Of course, this would require close co-operation from your ISP. They may 
have other ideas about how to do "classless in-addr.arpa delegation". If 
they follow RFC 2317 slavishly, they'll want to delegate a subzone of 
their /24 reverse zone, instead of just using some zone (e.g. 
example.com) that you're already serving. In that case, you'd need to 
add a new zone definition to named.conf, and somehow arrange for the 
zone to be slaved, for redundancy. You're pretty much stuck doing things 
whichever way they dictate.

                                                                         
                                                - Kevin