nanog mailing list archives
Re: comcast ipv6 PTR - DNSSEC
From: bmanning () vacation karoshi com
Date: Tue, 15 Oct 2013 03:45:05 +0000
On Mon, Oct 14, 2013 at 10:18:15PM -0500, Jimmy Hess wrote:
On Mon, Oct 14, 2013 at 10:01 PM, Barry Shein <bzs () world std com> wrote:This would be a lot of work, so nobody does it. If someone asks for the rdns for:> 2001:0db8:85a3:0042:1000:8a2e:0370:7334it's a lot of work for example.com to return something like: 2001-0db8-85a3-0042-1000-8a2e-0370-7334.example.com ?No... it's not a lot of work; the problem is, it's maybe worth even less than the amount of work involved though. What piece of information is being expressed there that would not be expressed by a NXDOMAIN response? Assuming the user is residential ".example.com" pertains to the ISP, not the hostname at that IP address. The ISP's info is accessible via services such as WHOIS-RWS How about some wildcard PTR record ? *.3.a.5.8.8.b.d.0.1.0.0.2.ip6.arpa PTR unnamedhost.example.com. It's equally useless; and conveys equally limited information about the host. However, at least it doesn't generate spurious records that are just (IP repeated).(domain) -- -JH
Forward domains and Reverse domains are often managed by different organizations - so if you were a paranoid validator, wanting to check that the name was from the correct place, you'd want to do DNSSEC validation on both the name and the address. Not going to weigh in on the value proposition. /bill
Current thread:
- Re: comcast ipv6 PTR, (continued)
- Re: comcast ipv6 PTR Franck Martin (Oct 14)
- Re: comcast ipv6 PTR Paul Ferguson (Oct 14)
- Re: comcast ipv6 PTR Barry Shein (Oct 14)
- Re: comcast ipv6 PTR John Levine (Oct 14)
- Re: comcast ipv6 PTR Blair Trosper (Oct 14)
- Re: comcast ipv6 PTR Chris Adams (Oct 15)
- Re: comcast ipv6 PTR Brielle Bruns (Oct 15)
- Re: comcast ipv6 PTR Andrew Sullivan (Oct 15)
- Re: comcast ipv6 PTR Barry Shein (Oct 14)
- Re: comcast ipv6 PTR Jimmy Hess (Oct 14)
- Re: comcast ipv6 PTR - DNSSEC bmanning (Oct 14)
- Re: comcast ipv6 PTR - DNSSEC Barry Shein (Oct 15)
- Re: comcast ipv6 PTR Barry Shein (Oct 15)
- Re: comcast ipv6 PTR John Levine (Oct 14)
- Re: comcast ipv6 PTR Barry Shein (Oct 15)
- Re: comcast ipv6 PTR Chris Adams (Oct 15)
- Re: comcast ipv6 PTR Eugen Leitl (Oct 15)
- Re: comcast ipv6 PTR Barry Shein (Oct 15)
- Re: comcast ipv6 PTR Cutler James R (Oct 15)
- Re: comcast ipv6 PTR John R. Levine (Oct 15)
- Re: comcast ipv6 PTR Mark Andrews (Oct 14)