Bind9 - Reverse net /20 mask 255.255.240.0
Mark Andrews
Mark_Andrews at isc.org
Thu Mar 6 23:04:49 UTC 2008
> Hello? I doubt with a setup for Reverse to
> The networks contracted to the AS, here is the problem and attitudes held,
>
>
> I would like obtain information where to set the bind9 to do the reverse of a
> network
> /20 mask 255.255.240.0 and
Just set up the 16 reverse zones that make up the /20.
> /18 mask 255.255.192.0
Just set up the 4 reverse zones that make up the /18.
RFC 2317 is for /25 - /32. It was designed to alleviate the
need to create up to 128 zones, along with their delegations,
which each of which was like:
@ SOA <soa details>
@ NS <server1>
@ NS <server2>
@ PTR <name>
RFC 2317 gives you 1 zone for up to 128 hosts rather than
1 zone per host.
For /17-/24 you have 1 zone per 256 hosts with traditional
delegation.
For /9-/16 you have 1 zone per 65536 hosts with traditional
delegation.
Mark
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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