PTR records for IPv6
farmer at umn.edu
Mon Sep 2 01:46:53 CEST 2013
On 9/1/13 16:30 , Brian E Carpenter wrote:
> So, is there any real operational value in this, or is it just
> a case of "we did it for v4 so it must be right for v6"?
Purely in the context of servers, especially well-know services like
mail and web, just to name a couple, I think there is some value in
having PTR records. PTRs help add some positive reputation and credence
that you are talking to an authorized service and not just a
fly-by-night service. I don't necessarily think this should be required
for every service, but requiring this for mail servers doesn't seem
completely out of line, for several reasons mentioned by others.
Also, I would really like to see all routers have at least some generic
PTR, simply for the sake of traceroute. And, traceroute itself is a
reasonable excuse to have PTR records on most well-known services.
However, in IPv4 some have required PTRs even on client and essentially
every IPv4 address used on the Internet. I think this has little value
and would most definitely be a case of "we did it for v4 so it must be
right for v6", not to mention the fact that /64 for all practical
purposes is innumerable.
So, I wouldn't want to generically reuse the same operational practices
for PTRs in IPv6 that we have use in IPv4 up to now, but that doesn't
mean I think PTR are completely obsolete and I think they have value in
some situation, this is probably one of them.
> -------- Original Message --------
> Subject: [nznog] Orcon IPv6 rDNS delegation
> Date: Mon, 2 Sep 2013 02:08:47 +1200
> From: Jonathan Spence <jonathan.spence at power-business.co.nz>
> Reply-To: jonathan.spence at power-business.co.nz
> To: <nznog at list.waikato.ac.nz>
> Hi everyone, Google have just started enforcing PTR records for IPv6
> addresses delivering to Gmail. Our IPv6 works great with Orcon but having
> serious issues getting delegation back to our nameservers setup.
> <irrelevant operational details omitted>
David Farmer Email: farmer at umn.edu
Office of Information Technology
University of Minnesota
2218 University Ave SE Phone: 1-612-626-0815
Minneapolis, MN 55414-3029 Cell: 1-612-812-9952
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