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Date:      Mon, 24 May 1999 14:58:32 -0700
From:      Renaud Waldura <rwaldura@LIGOS.COM>
To:        mark@intrepid.net
Cc:        freebsd-isp@freebsd.org
Subject:   RE: BIND and subnetted in-addr.arpa domains
Message-ID:  <9141909996F1D011B8FF00A0C95A661B33EF08@server.ligos.com>

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Or you could directly map the addresses into their name space:

1	CNAME		1.addr.example.com.
2	CNAME		2.addr.example.com.

where example.com is your client's domain.

On the client side they have to maintain only one zone file for example.com:

www.example.com		A	10.1.1.1
1.addr.example.com	PTR		www.example.com.

etc.

--Renaud


> -----Original Message-----
> From:	dan@nfol.com [SMTP:dan@nfol.com]
> Sent:	Monday, May 24, 1999 6:22 AM
> To:	mark@intrepid.net
> Cc:	freebsd-isp@freebsd.org
> Subject:	Re: BIND and subnetted in-addr.arpa domains
> 
> 
> > We have a dedicated access customer who wants to run reverse
> > DNS on the subnet that we're routing to him.  We're running BIND 4.9.X,
> > and I've looked though the BOG and man pages -- this doesn't seem
> > possible.
> 
> > Is it possible in BIND 8?  This may be a good reason to upgrade if it
> is.
> 
> This is possible in bind 4.9.x as well.  AFAIK, there is no easy way to
> indicate
> what ip address the subnet starts on.  There are several ways to do this,
> and 
> the one that seems the easiest to administrate is to assign the PTR
> records to
> a CNAME, then assign a NS for that CNAME.  Here's an example for a subnet
> in
> a class C, 10.0.0.0:
> 
> 32		IN	PTR	32.subnet.0.0.10.in-addr.arpa.
> 33		IN	PTR	33.subnet.0.0.10.in-addr.arpa.
> 34		IN	PTR	34.subnet.0.0.10.in-addr.arpa.
> 35		IN	PTR	35.subnet.0.0.10.in-addr.arpa.
> 36		IN	PTR	36.subnet.0.0.10.in-addr.arpa.
> ...
> 
> subnet		IN	NS	ns.other.server.com.
> 		IN	NS	ns2.other.server.com.
> 		
> 
> On the customer's side, he/she will have to have a zone setup for the
> domain
> subnet.0.0.10.in-addr.arpa.  
> 
> I am unaware of an easier way to do this.  Perhaps bind8 has the ability
> to
> make this easy.
> 
> 
> Dan Harnett
> 
> 
> 
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