How to request rDNS from my ISP?

[Steve Cabito]

I recently posted the message below and received a prompt and helpful 
response. However, the only info my ISP has given me is the host names 
of their name servers. I am told that I am not authoritative for the 
reverse.

Should I disregard RFC 2317 and Mark's suggestions and simply remove 
in-addr.arpa records from my config?

Is this just a matter of doing things their way?

I had been worried that running a misconfigured name server in their IP 
space might cause them problems; it seems not.

What is the minimum information I have to give them, when using one IP 
for bind and name-based web hosting? All host names? All domain names?

Thanks,

-Steve

==============================
[Previous post]

 > >
 > > I have to move some domains and their DNS server from a class C to 
a new
 > > /27 block elsewhere. Can someone provide an example of a minimal
 > > (skeleton) named.conf and db.something to help me get bind set up?
 > > Thanks in advance,
 > >
 > > -Steve
 > >

	The only real difference is that you don't have a full /24
	assigned to you.  This needs to be handled specially.

	See RFC 2317, Classless IN-ADDR.ARPA delegation.

	Assuming you have been delegated 1.2.3.32/27 and you and
	your ISP decide to use 32-63.3.2.1.in-addr.arpa as the zone
	name your side should look something like this.

	You will have a local copy of the reverse for the /24 your
	address space is delegated from.  This will allow you to
	always have the CNAMEs to map from the well known names to
	the names that actually have the PTR records even when your
	external link is down.  You will also have a zone
	(32-63.3.2.1.in-addr.arpa) with the PTR records.

	Mark

zone "3.2.1.in-addr.arpa" {
	type slave;
	file "slave/3.2.1.in-addr.arpa";
	masters { /* ISP's auth servers here */ };
	notify no;
};

zone "32-63.3.2.1.in-addr.arpa" {
	type master;
	file "master/32-63.3.2.1.in-addr.arpa";
};

master/32-63.1.2.3.in-addr.arpa:
$TTL 3600
@	SOA	...
@	NS	...
@	NS	...
33	PTR	...
34	PTR	...
...
62	PTR	...

--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org