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  1. Go ping yourself... phoeneous's Avatar
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    #1

    Default PTR records werent being updated

    Discovered something today that I wanted to share. I tried to do an nslookup on several boxes and noticed that some of them were retrieving records and some werent. I checked dns and sure enough, not all ptr records were there for dynamically created A records. Turns out that I had to update the dns credentials that were on the dhcp server. I think the admin before me created a special account that was used for dns updates but the account no longer exists. After I gave it to correct credentials, ptr records started showing up for clients that renewed their leases. Just an fyi.

    Configure DNS dynamic update credentials: Dynamic Host Configuration Protocol (DHCP)
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  3. Solutions Architect gateway's Avatar
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    #2
    Well found!
    It's amazing what you learn about DNS studying for the 291
    I have redesigned and rebuilt our DNS namespace strategy since doing and whilst studying for the 291.
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  4. Senior Member Devilsbane's Avatar
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    #3
    Another thing to look out for would be an account with an expiring password. That can tear down a network rather quickly as well.
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  5. Go ping yourself... phoeneous's Avatar
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    #4
    Quote Originally Posted by Devilsbane View Post
    Another thing to look out for would be an account with an expiring password. That can tear down a network rather quickly as well.
    All of my service accounts have a non-expiring, 12 character password.
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