DNS Reverse lookup zone

[Andrew Lee]

Barry Margolin <barry.margolin at level3.com> a écrit:

> In article <biit19$2rtj$1 at sf1.isc.org>,
> Andrew Lee  <gladius at gladius.f9.co.uk> wrote:
>>Is it possible for us to provide the reverse lookup for our IP's but
>>for our ISP to be responsible for the domain names?
> 
> Sure.  Just put the reverse domains on your nameservers.  There's no
> built-in relationship between forward and reverse DNS.  They're all
> just ordinary domains as far as the nameservers and resolvers are
> concerned. 

Ok, thanks - would I do that like 
zone "x.x.x.in-addr.arpa" {
    	type master;
    	file "x.x.x";
};

and then the zone file with 
$TTL 1D
@  	IN    	SOA     ns1.example.com. hostmaster.example.com. (
all the good stuff );
NS  ns1.example.com.
1    	PTR     	mail.example.com.
2     PTR    	mail1.example.com.

or would I need the PTR records to point to my ISP?

I'm a little confused :)


and then would I not have any other zone files in there at all?


> However, it's often a maintenance headache to have different
> organizations maintain the two domains, because it's very easy for
> them to become inconsistent.  ISPs often use software to build the
> forward and reverse domains automatically from the same raw data, so
> they can ensure consistency.

Yeah, that would be the ideal, but they seem rather resistant to that.
 
>>We have our own RIPE allocated class C subnets, and our ISP is holding
>>the mx and other records for our domain, but they say they can't do
>>the reverse DNS, because the IP's do not belong to them - so we would
>>need to do this ourselves. Is this possible? Or do we need to do both?
> 
> They're wrong about not being able to do the reverse DNS.  You should
> be able to have RIPE delegate the reverse DNS to their nameservers.
> 

Ok, that's good to know, I'll try to pursue that, but in the interim advice 
on how to set up the ns for just r-lookup would be appreciated

thanks


-- 
Andrew Lee | gladius at gladius.f9.org.uk \PGP:DC84 FD28 DA8A E38A A9DD|
AVIEN Founding Member |http://avien.org \ID:18A9 AFAD 5422 43F1 4C81|           
// It is not certain that everything is uncertain -- Blaise Pascal
// Opinions expressed are my personal views, not those of my employer