Thanks for the reply Len. Your answers are always helpful, if somewhat lacking in tack.
I wasn't mixing up NS records and MX records, I was drawing a parallel. The idea was that when you query a server (mail, DNS, whatever), does that server have to identify itself and does it matter what answer is given. I know how it works for SMTP servers, and I know how it appears to work for DNS servers, and the question is whether there is wiggle room with DNS servers. I do get the message that you cannot move the DNS services among different machines without also reconfiguring the glue records. To tell you the truth, this surprises me. It would make more sense, providing greater flexibility, if you could. I just assumed that this had been worked out and that I was just ignorant of the answer. Anyway, I wouldn't say I was looking to play "tricks", just investigating ways to make our DNS servers more reliable and efficient. Thanks for the information from you and everyone else who replied. Ben ----- Original Message ----- From: "Len Conrad" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, May 14, 2004 7:49 AM Subject: Re: [IMail Forum] OT: Alias for DNS > > >a couple of other responses discussed). We want to be able to take the same > >IP to a different machine, with a different name. > > Then, clear and simple, you need to unregister/delete the current host at > parent NSs, and register a new host. You will also have to modify ALL > domains delegated to the current host so they are delegated to the new host > (or wherever). > > >Let me ask this: when mail servers talk to each other, they give their names > >and that can (or will someday) be important. Does is matter if the DNS > >server's reported name > > "reported" where? in the SMTP greeting? why are you mixing in MX > algorithm and SMTP protocol with a glue record question? They are totally > independent issues. > > >doesn't match the claimed (DNS A record) name? > > which A record, in the parent's zone NS. You need to separate your > thinking about how DNS works and how SMTP works. They are totally separate > protocols. > > >Rather than use an alias > > don't use CNAMES within 10 miles of NS or MX records. > > >There must be some standard way to do this. > > standard tricks? nope > > >Otherwise, every time you replace your DNS server (with a machine with a > >new name), you'd have to reset all the registration records for any > >managed zones. > > You've finally got the picture. Quit looking for DNS tricks to play with > your host and domain registrations. > > Len > > > _____________________________________________________________________ > http://MenAndMice.com/DNS-training : Denver; NYC; San Jose > http://IMGate.MEIway.com : free anti-spam gateway, runs on 1000's of sites > > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
