For larger subnets just use multiple zones as necessary.  

For 10.20.30.0/23 you have 30.20.10.in-addr.arpa and 31.20.10.in-addr.arpa.

For smaller than a /24 look at RFC 2317.  That's only necessary if you want to 
delegate authority to a different DNS server.  If you have multiple networks in 
a /24, all of the rDNS entries for those networks can exist in a single zone.


On Oct 6, 2010, at 1:43 PM, Alex McKenzie wrote:
>  But how do I deal with larger or smaller subnets?  Clearly I can't use
> exactly the same notation, but I assume there has to be a way.  If
> anyone can even point me at some documentation, I'd appreciate it --
> I've been looking for a few days, and everything I've found assumes a
> /24 subnet.

--
Matt Baxter
m...@fatpipe.org



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