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RTM2007Flag for Afghanistan asked on

Strange - Server will not perform DNS update of it's new IP address (DR scenario) to the domain

We are testing a failover of services for a number of servers. One of those portions is bringing up our Lotus Notes server at a remote office. In our main branch office we have our mail server as 10.0.0.120 and when it comes up in our transatlantic remote office it is on a different IP scheme (10.1.7.120). The failover is fine and all services work however, the DNS A record does not update for the domain (even if you do a /flushdns /registerdns manually from the 10.1.7.120 server (which has not taken the same hostname).

The strange thing is that there is even a active DC (GC/DNS/DHCP) at the remote office (10.1.7.2).

The only way we've gotten this to work is to manually go into DNS management and update the A and PTR record manually.
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DrDave242

8/22/2022 - Mon
Paka

Is your DNS server setup for only Secure Dynamic updates?  Try to change it to Nonsecure and Secure or change the security permissions on the A record itself.
DrDave242

Are there any errors in the DC's DNS event log?
ASKER
RTM2007

No errors in the DC's DNS event log.

How do I check if the DNS servers are setup for only Secur Dynamic updates or not?

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James Murphy
DrDave242

In the server's DNS console, right-click the appropriate forward lookup zone and select Properties.  Under the General tab of the properties window, you'll see a dropdown for dynamic updates.  The three options are Secure only, Nonsecure and secure, and None.
ASKER
RTM2007

It is set to secure only.

Changing to to nonsecure - won't this present a security problem/limitation?
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DrDave242

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ASKER
RTM2007

Ok tried that just to test it out. Looks like the problem is still there even though we had both DCs on Nonsecure and secure updates.

Actually, I just checked the event logs and there was a DNSAPI error saying that the computer failed to update the A record and to run a /registerdns manually... I'm a little curious to find out why though. Any ideas on how to troubleshoot?
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DrDave242

Post the text of the DnsApi error, if you don't mind.  There may be something in there that indicates why the registration failed.