That gets to the core of the original question. I figured there must be a reason for the conscious omission. However, I've noticed also that Comcast hasn't bothered to give PTR to their routers, either.
I think that's a horse of a different color. Leaving out PTR on the last hop for the residential customer? Sure. Leaving out v6 PTR on your core/backbone/edge routers? Surely that's not acceptable... On Mon, Oct 14, 2013 at 9:47 PM, John Levine <[email protected]> wrote: > >Is there any reason other than email where clients might demand RDNS? > > There's a few other protocols that want rDNS on the servers. IRC maybe. > > Doing rDNS on random hosts in IPv6 would be very hard. Servers are > configured with static addresses which you can put in the DNS and > rDNS, but normal user machines do SLAAC where the low 64 bits of the > address are quasi-random. To get any sort of DNS you'd need for the > routers to watch when new hosts come on line and somehow tell the > relevant DNS servers what hosts need names. > > This would be a lot of work, so nobody does it. > > R's, > John > >
