From owner-freebsd-questions Thu Jan 24 14:11:17 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mail.strongnet.co.nz (mail.strongnet.co.nz [210.54.142.6]) by hub.freebsd.org (Postfix) with ESMTP id 3E99C37B841 for ; Thu, 24 Jan 2002 14:02:56 -0800 (PST) Received: from wapsolutions.co.nz (port-91-96.fastadsl.net.nz [203.96.91.96]) by mail.strongnet.co.nz (8.11.0/8.9.3) with ESMTP id g0OM0wP07103 for ; Fri, 25 Jan 2002 11:00:58 +1300 Message-ID: <3C508458.1030705@wapsolutions.co.nz> Date: Fri, 25 Jan 2002 11:02:00 +1300 From: Jonathan Chen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.7) Gecko/20011221 X-Accept-Language: en-us MIME-Version: 1.0 To: freebsd-questions@freebsd.org Subject: Reverse-ptr entry under DNS Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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. Cheers. -- Jonathan Chen "Nyuck, nyuck, nyuck" -- Curly. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message