[30598] in North American Network Operators' Group
Re: lame delegations
daemon@ATHENA.MIT.EDU (Gary E. Miller)
Fri Aug 18 15:35:48 2000
Date: Fri, 18 Aug 2000 12:33:01 -0700 (PDT)
From: "Gary E. Miller" <gem@rellim.com>
To: Joshua Goodall <joshua@roughtrade.net>
Cc: nanog@merit.edu
In-Reply-To: <Pine.BSF.4.21.0008182109580.20704-100000@juice.shallow.net>
Message-ID: <Pine.LNX.4.21.0008181228090.24973-100000@catbert.rellim.com>
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Errors-To: owner-nanog-outgoing@merit.edu
Yo Joshua!
On Fri, 18 Aug 2000, Joshua Goodall wrote:
> c) not everyone wants the reverse to match the forward (is this an RFC
> violation? I hope not :)).
RFC 1912, Sec 2.1:
" Make sure your PTR and A records match. For every IP address, there
should be a matching PTR record in the in-addr.arpa domain. If a
host is multi-homed, (more than one IP address) make sure that all IP
addresses have a corresponding PTR record (not just the first one).
Failure to have matching PTR and A records can cause loss of Internet
services similar to not being registered in the DNS at all. Also,
PTR records must point back to a valid A record, not a alias defined
by a CNAME. It is highly recommended that you use some software
which automates this checking, or generate your DNS data from a
database which automatically creates consistent data."
I have yet to hear a convincing argument why this RFC should be
ignored. I have seen many problems when this is ignored.
RGDS
GARY
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Gary E. Miller Rellim 20340 Empire Ave, Suite E-3, Bend, OR 97701
gem@rellim.com Tel:+1(541)382-8588 Fax: +1(541)382-8676
