Date: Fri, 25 Jan 2002 17:05:52 +0000 From: Ceri <setantae@submonkey.net> To: Jonathan Chen <jonc@wapsolutions.co.nz> Cc: freebsd-questions@freebsd.org Subject: Re: Reverse-ptr entry under DNS Message-ID: <20020125170552.GA1108@rhadamanth> In-Reply-To: <3C508458.1030705@wapsolutions.co.nz> References: <3C508458.1030705@wapsolutions.co.nz>
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On Fri, Jan 25, 2002 at 11:02:00AM +1300, Jonathan Chen wrote: > Hi, > > Here in NZ, I've noticed that IP addresses allocated for ADSL > connections have odd reverse-ptr entries: > eg: > > dig -x 203.96.91.96 > [...] > ;; ANSWER SECTION: > 96.91.96.203.in-addr.arpa. 24m1s IN CNAME > 96.96-127.91.96.203.in-addr.arpa. > > ;; AUTHORITY SECTION: > 91.96.203.in-addr.arpa. 3d23h24m1s IN NS reliant.netgate.net.nz. > 91.96.203.in-addr.arpa. 3d23h24m1s IN NS defiant.netgate.net.nz. > > If I use: > > nslookup -type 203.96.91.96 > I eventually get the name associated with the IP. > > Is it legal to have CNAMEs for in-addr.arpa addresses instead of > PTR? I ask this 'cos the freebsd.org mailservers don't seem to > think so, and it's refusing to accept email directly from these IPs. Kind of. Read RFC2317. I think it's an ugly hack, but that's just my opinion. And it should work, yes. Ceri -- keep a mild groove on To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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