[146183] in North American Network Operators' Group
Re: Performance Issues - PTR Records
daemon@ATHENA.MIT.EDU (Leigh Porter)
Mon Nov 7 08:53:28 2011
From: Leigh Porter <leigh.porter@ukbroadband.com>
To: "sthaug@nethelp.no" <sthaug@nethelp.no>
Date: Mon, 7 Nov 2011 13:52:46 +0000
In-Reply-To: <20111107.144648.74734213.sthaug@nethelp.no>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 7 Nov 2011, at 13:48, "sthaug@nethelp.no" <sthaug@nethelp.no> wrote:
>>> The practice of filling out the reverse zone with fake PTR record
>>> started before there was wide spread support for UPDATE/DNS. There
>>> isn't any need for this to be done anymore. Machines are capable
>>> of adding records for themselves.
>>=20
>> How do I setup this for DHCPv6-PD? Say, I delegate 2001:db8:42::/48 to=
>> the end user. Should I delegate reverse DNS as well? If so, to whom?
>>=20
>> Or is it the CPEs responibility to dynamically add records for whatever=
>> addresses it sees on the internal LAN(s)? Are there CPEs capable of
>> doing this?
>>=20
>> Or will the end systems themselves do the update against my DNS server?=
>> If so, how do I authenticate that?
>=20
> With my ISP hat on, I find the idea of customer CPEs updating their
> own PTR records to be completely unacceptable. So I guess I'll either
> live without the reverse DNS, or use a name server that can synthesize
> answers on the fly.
>=20
> Steinar Haug, Nethelp consulting, sthaug@nethelp.no
>=20
Indeed, there is no way I would allow that either. But really, providing a=
reverse zone and forward zone to match is a case of five minutes and a sh=
ell script or a DNS that as Steinar said, will synthesise results.
It's really not all that difficult..
--
Leigh Porter
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