Revise DNS settings for Exchange 2013
I know that DNS can be a "religious topic", and I have had cases where even poorly implemented DNS works adequately, but following an upgrade to Ex13, I want to take a fresh look at my DNS settings since some of them date back to the guy before me and probably back to an NT domain.
First question, under primary domain->DomainDNSZones->_t
Also, we accept mail for our primary domain and a few variants all of which are listed in DNS but only the primary is part of AD. Each alternate domain has a mailserver.alt-domain.com MX record that points to the primary domain Exchange server. I just read to NOT have MX records internally since the clients know how to get to the server already. Should I delete these?
And finally, there is a CNAME record in all the alternate domains named '*' that points to the primary webserver (now gone anyway and hosted outside). I think I should delete these guys. Correct?
Oh and one more - I had an entry called 'legacy' that was used to point to the Ex07 server during my migration to Ex13. I assume I can kill this, too?
Any Microsoft DNS guys up on Exchange 2013 that can advise me on this? Thanks.
First question, under primary domain->DomainDNSZones->_t
Also, we accept mail for our primary domain and a few variants all of which are listed in DNS but only the primary is part of AD. Each alternate domain has a mailserver.alt-domain.com MX record that points to the primary domain Exchange server. I just read to NOT have MX records internally since the clients know how to get to the server already. Should I delete these?
And finally, there is a CNAME record in all the alternate domains named '*' that points to the primary webserver (now gone anyway and hosted outside). I think I should delete these guys. Correct?
Oh and one more - I had an entry called 'legacy' that was used to point to the Ex07 server during my migration to Ex13. I assume I can kill this, too?
Any Microsoft DNS guys up on Exchange 2013 that can advise me on this? Thanks.
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Yep, that's right. It's a wildcard (and not default). If the thing the wildcard points to is gone it can't be doing anything. Consequently getting rid of it in that circumstance should be perfectly acceptable.
Chris
Chris
ASKER
That should do it! Thank you.
ASKER
Thanks again Chris - your expertise is much appreciated!
ASKER
Many thanks. What is the significance of the CNAME called '*'? Is that a wildcard or default?