On Wed, 6 Oct 2010, Alex McKenzie wrote:
Out of curiosity: what if it's a /16 or /8 network? Do those also get
built as 24 bit files, or can they be built differently? I seem to
recall seeing an option for a reverse lookup file with hosts declared as:
x.y PTR host.domain.tld.
Does that work, or was that an old format that's been deprecated, or
would it never have worked?
Sure, that works
For the /16 case, define the zone like b.a.in-addr.arpa & define records like
"d.c PTR name." for address a.b.c.d.
For the /8 case, define the zone like a.in-addr.arpa & define records like
"d.c.b PTR name." for address a.b.c.d.
Note the order of the address components in the zone file, with least
significant furthest left.
________________________________________________________________________
Jay Ford, Network Engineering Group, Information Technology Services
University of Iowa, Iowa City, IA 52242
email: jay-f...@uiowa.edu, phone: 319-335-5555, fax: 319-335-2951
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