comcast ipv6 PTR

Tue Oct 15 14:57:04 UTC 2013

Mark Andrews <marka at isc.org> writes:

> Actually you just need to *let* the hosts update their own ptr
> records using UPDATE.
>
> People keep saying the PTR records don't mean anything yet still
> demand really strong authentication for updates of PTR records.
> TCP is more than a strong enough authenticator to support update
> from self.
>
> You can even delegate the reverse zone when doing or just after a PD.
>
> * Accept NS/DNAME updates for the reverse prefix from any address
>   in the delegated address range over TCP.  This avoids having a
>   temporatially lame delegation.  named already has code to do this
>   for /48's as I coded it to to support 6to4.

This sounded like an excellent idea at first, but then I started
thinking:  As a home user, would I really want to give anyone with
access to my network the right to change my reverse delegation?

I don't think so.  I am not even sure I would want them all to be able
to update the PTR record for the addresses they use.

Bjørn