[dns-operations] IPv6 PTR best practice

Mark Andrews marka at isc.org
Thu May 10 00:46:54 UTC 2018

> On 10 May 2018, at 7:36 am, Ray Bellis <ray at isc.org> wrote:
> On 09/05/2018 21:56, Mark Andrews wrote:
>> They are Internet SERVICE Providers and they are NOT providing
>> FULL service.  Part of being on the Internet FULLY is the ability
>> to NAME YOUR OWN MACHINE.  This can be done fully automatically
>> without the ISP having to deploy more staff.  What say ARIN, APNIC
>> and RIPE pull all the IN-ADDR.ARPA delegations for all the ISPs they
>> currently do to and wait for the howls of protest.
>> Just because you are a home user doesn’t mean that you should not
>> be able to publish the name of your machine.  That is ISPs acting
>> as a CARTEL against the home user.
> Respectfully Mark, as an ex-ISP guy myself, I must disagree.
> For customers with static assignments it is pretty straight forward.
> For home users with dynamically assigned IP addresses it's *not* as
> simple as just permitting a TCP authenticated dynamic update.
> You must also *automatically* erase / replace that PTR record whenever
> the user gets disconnected, which at the very least means hooks into the
> RADIUS and/or DHCP server on session logout, and may also require some
> background reaping to cope with those cases where a user gets
> disconnected without a corresponding RADIUS message (e.g. an LNS crash).
> If you don't do that, the next customer that comes along on that IP
> address who doesn't update their PTR will get left with the previous
> users' record.

Which is why automated cleanup was mentioned.  Two different methods of
cleanup to be precise.

Stuart Cheshire is also looking at server cleanup of dynamically added

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

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