Bind9 - Reverse net /20 mask 255.255.240.0

Mark Andrews Mark_Andrews at isc.org
Thu Mar 6 23:05:54 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.

	Just set up the 64 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
-- 
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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