Date: Fri, 13 Aug 1999 14:40:11 +0100 From: Tony Finch <dot@dotat.at> To: Doug@gorean.org Cc: hackers@freebsd.org Subject: Re: (2) hey Message-ID: <E11FHZ5-000Oqi-00@fanf.noc.demon.net> In-Reply-To: <Pine.BSF.4.05.9908121648340.84187-100000@dt011n65.san.rr.com> References: <199908122308.TAA88002@whizzo.transsys.com>
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Doug <Doug@gorean.org> wrote: >Louis A. Mamakos wrote: >>[lost attribution] >>> >>> That IS a violation of the standard, since A records are not valid >>> for hosts in in-addr.arpa. >> >> And next I suppose you'll tell me that PTR records are not valid >> outsize of the IN-ADDR.ARPA portion of the DNS namespace? > > Given how PTR RR's are defined, I'd have to say, ayyup. I suggest you read RFC 2317 (classless reverse DNS). Among its recommendations are setups like: 130.134.240.212.in-addr.arpa. CNAME 130.128/28.134.240.212.in-addr.arpa. 130.128/28.134.240.212.in-addr.arpa. PTR dotat.at. and: 130.134.240.212.in-addr.arpa. CNAME 130.rev.dotat.at. 130.rev.dotat.at PTR dotat.at. RFC 2181 allows the / in the CNAME RRs. There's no reason for restricting PTR RRs to a particular part of the name space, and indeed this example shows that doing so can make administration unnecessarily harder. The real reverse DNS for dotat.at uses this more conservative setup: 130.134.240.212.in-addr.arpa. CNAME 130.128-28.134.240.212.in-addr.arpa. 130.128-28.134.240.212.in-addr.arpa. PTR dotat.at. Tony. -- f.a.n.finch dot@dotat.at fanf@demon.net e pluribus unix To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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