IPv6 rDNS

Tue Nov 2 17:42:53 UTC 2010

would be interested in anybody other
than IRC operators who feel they still require forward and reverse DNS
to match,

SMTP, email-2 (don't ask ;), and preferably (though not required) anything 
that has to do with /bin/login on *nix systems (as it shows the reverse 
dns host name in who and w and last unless specified otherwise).

although smtp -itself- does note require it to match, the various 
"anti-spam" things -do-.

On Tue, 2 Nov 2010, David Freedman wrote:

> Lee Howard wrote:
>> Since there's a thread here, I'll mention rDNS for residential users.
>>
>> I'm not sure there's consensus about whether forward and reverse ought
>> to match (how strong a "should" is that?).  I know you can't populate
>> every potential record in a reverse zone, as in IPv4.  You can generate
>> records on the fly, or just not provide PTRs.
>>
>> I've described options in draft-howard-isp-ip6rdns-04 but I'm not sure
>> enough people care whether it's published as an RFC.  Discuss on
>> IETF's dnsop list.
>> https://www.ietf.org/mailman/listinfo/dnsop
>>
>
> Presuming that signed wildcarding in ip6.arpa is achieveable under
> DNSSEC  (use of the LABELS field), would be interested in anybody other
> than IRC operators who feel they still require forward and reverse DNS
> to match,
>
> I feel this preferable than either not providing PTRs or dynamically
> creating them on query (which would be cool but another headache DoS
> vector to manage well)
>
> Thoughts?
>
>
> -- 
>
>
> David Freedman
> Group Network Engineering
> Claranet Group
>
>