Date: Mon, 16 Jul 2007 13:07:55 +0700 (ICT) From: Olivier Nicole <on@cs.ait.ac.th> To: cswiger@mac.com Cc: freebsd-questions@freebsd.org, cuongvt@fpt.vn Subject: Re: is is able to setting up DNS server reverse lookup with DynamicIP? Message-ID: <200707160607.l6G67tod005252@banyan.cs.ait.ac.th> In-Reply-To: <157815A5-2619-4457-85B0-40941C58C284@mac.com> (message from Chuck Swiger on Fri, 13 Jul 2007 10:13:03 -0700) References: <46970917.3030502@fpt.vn> <200707130536.l6D5akxS070187@banyan.cs.ait.ac.th> <157815A5-2619-4457-85B0-40941C58C284@mac.com>
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> >> I'm using dynamicDNS, so I will able to specify the forward *AND* > >> reverse lookups? > > > > Yes. > > No, nobody else is going to see the results your local nameserver > sends since it isn't authoritative for the domains, and the > delegation for the IP block isn't going to point to your server but > to the actual nameserver. Take a look at what happens when someone > using an external nameserver does the same queries: For the example I gave, I am of course authoritative. > Notice the NXDOMAIN response...? Stange, because I don't get such response, even when querying from germany to my domain in Thailand. (Could have been a matter of time of day, Friday 22:00 is busy time in Thailand, the DNS may have been hard to reach). > The answer everyone else gets, VAIO.desktops.cs.ait.ac.th, doesn't > match alrw17.desktops.cs.ait.ac.th, so a double-reverse lookup check > would fail. It could have been a cache issue? Same thing I get correct answer for a request made from Germany to that Thai domain. Best regards, Olivier
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