Danny Verrazano
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DNS Records Deleted?
I would like to know under what circumstances (either by design or otherwise... all inclusive) would any server (including domain controllers) remove their own DNS records.
Is this not only possible but is it something that occurs regularly/normally?? and if so, why?
Thank you!
Is this not only possible but is it something that occurs regularly/normally?? and if so, why?
Thank you!
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I've never come across a situation whereas a DC would remove it's own DNS info and I've been managing a network since days of NT4.
ASKER
When dynamic updates is turned on, even with servers set with static IP addresses, do they refresh their DNS records on a schedule of some sort?
If so, what would that refresh look like to the DNS servers? How is it done? Is it that they do a delete and then re-register??
If so, what would that refresh look like to the DNS servers? How is it done? Is it that they do a delete and then re-register??
I agree with efrimpol. Yes, the server has the ability to do this, because the permissions on the server's own DNS records allow it to make changes to them, but I can't think of a situation in which a server would delete them (aside from some kind of strange malware action).
I believe the refresh happens every 60 minutes for a DC and every 24 hours for everything else. Nothing gets deleted during a refresh; the timestamp on the record is simply updated.
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ASKER
So you all are mentioning that Dynamic DNS clients regularly update records (every 24 hours?).
What is the expected normal behavior of servers/domain controllers with static IP addresses in regards to the event logs? In other words, what events would be logged when a server/domain controller successfully updates or refreshes its DNS records?
and
What events would be logged on Servers/Domain Controllers if they could not successfully update their DNS records?
What is the expected normal behavior of servers/domain controllers with static IP addresses in regards to the event logs? In other words, what events would be logged when a server/domain controller successfully updates or refreshes its DNS records?
and
What events would be logged on Servers/Domain Controllers if they could not successfully update their DNS records?
I can't be very specific on that, I'm afraid. What I can tell you is that the DNS console has it's own event log, you could filter that for errors / warnings?
I'm fairly certain nothing goes into the event logs when a machine (DC or not) successfully refreshes its DNS records. I'm not sure whether anything gets logged when a refresh fails, but I don't think so. At least, I can't recall ever seeing an event of that sort.
Incidentally, it doesn't even appear that debug logging logs refresh packets.
Incidentally, it doesn't even appear that debug logging logs refresh packets.
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Thank you all for your input. Greatly appreciated.
ASKER
Does a server (and/or Domain Controller) have the ability to remove its own DNS records (A or SRV)?
If yes, when and why would that happen?
Anyone?