To:
Markus Stumpf <maex-lists-dns-ietf-dnsop@Space.Net>
Cc:
dnsop@cafax.se
From:
Mans Nilsson <mansaxel@sunet.se>
Date:
Fri, 4 Apr 2003 13:17:23 +0200
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Subject:
Re: I-D ACTION:draft-ietf-dnsop-inaddr-required-04.txt
Subject: Re: I-D ACTION:draft-ietf-dnsop-inaddr-required-04.txt Date: Thu, Apr 03, 2003 at 09:28:13PM +0200 Quoting Markus Stumpf (maex-lists-dns-ietf-dnsop@Space.Net):
> What I am missing is some kind of requirement of usefulness of the
> IN-ADDR data. We have
> Internet providers and other users to whom a block of addresses are
> delegated SHOULD provide for lookup of host names from IP addresses.
>
> Do PTR records within the following list qualify for the above statement,
> i.e. do they qualify as "host names"?
> (I picked those examples from a scrolling maillog file, so the listed hosts
> are picked at random and not for the purpose to offend anyone)
>
> unknown.level3.net 64.157.143.50
> 67.106.228.14.ptr.us.xo.net 67.106.228.14
> 200-170-198-6.core01.spo.ifx.net.br 200.170.198.6
> 0x50a2eb04.unknown.tele.dk 80.162.235.4
They do convey something -- the operator has taken care of them,
perhaps only by $GENERATE, but still, and it has not been delegated
further, for whatever reason. I find this partially useful in
assessment och "credibility". That it is served is essentially the
most important part, (because of problems associated with unreachable
servers et al.) but there is also value in these autgenerated labels.
> If these are considered to be valid "host names" it would IMHO be nice
> if the, obviously generated, names mapping the IP address would also
> carry some CIDR information. A naming scheme like in RFC 2317 could be
> used:
<snip>
> This would help especially in cases where no assignment information
> beyond /16 is available from the RIR databases to block out abusive
> hosts/nets without risking collateral damage.
>
> IMHO recommending this would be nice, but maybe this is beyond the
> objective of that draft.
Agree.
--
Måns Nilsson Systems Specialist
+46 70 681 7204 KTHNOC
MN1334-RIPE
The PILLSBURY DOUGHBOY is CRYING for an END to BURT REYNOLDS movies!!