Hello,
First of all, I would recommend protecting your DNS zones from random updates by requiring secure updates which will allow only authenticated computers to update their DNS records.
For the cleanup which is made each week, I think that it is because aging and scavenging is enabled.


This
posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Microsoft
Student Partner 2010 / 2011
Microsoft
Certified Professional
Microsoft
Certified Systems Administrator: Security
Microsoft
Certified Systems Engineer: Security
Microsoft
Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration
Microsoft
Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
Microsoft
Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration
Microsoft
Certified Technology Specialist: Windows 7, Configuring
Microsoft
Certified Technology Specialist: Designing and Providing Volume Licensing Solutions to Large Organizations
Microsoft Certified IT Professional: Enterprise Administrator
Microsoft Certified IT Professional: Server Administrator
Microsoft Certified Trainer

Need to support users over the internet? click here try our remote control online beta

There are a bunch of old DNS entries that keep reappearing, apparently out of nowhere. Because of one cause or another, some machines, all on DHCP, get a new IP address, but the old IP entries are in the AD/DNS. I can go to each machine, do an
ipconfig/renew and ipconfig/registerdns and I can see that after a little bit all the AD/DNS servers for the domain have the new correct IP. This lasts less than an hour, with the old IP coming back after that. It seems to take about a week
for those old records to disappear for good but would be good to know what needs to be done to get rid of them sooner.
Note that I'm just a normal user with no write access to the AD/DNS servers or their configuration, but can query all of them and/or ask IT to do a few things.

There is an amazing pack of free network admin tools. click here to download it

Hello,
First of all, I would recommend protecting your DNS zones from random updates by requiring secure updates which will allow only authenticated computers to update their DNS records.
For the cleanup which is made each week, I think that it is because aging and scavenging is enabled.


This
posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Microsoft
Student Partner 2010 / 2011
Microsoft
Certified Professional
Microsoft
Certified Systems Administrator: Security
Microsoft
Certified Systems Engineer: Security
Microsoft
Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration
Microsoft
Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
Microsoft
Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration
Microsoft
Certified Technology Specialist: Windows 7, Configuring
Microsoft
Certified Technology Specialist: Designing and Providing Volume Licensing Solutions to Large Organizations
Microsoft Certified IT Professional: Enterprise Administrator
Microsoft Certified IT Professional: Server Administrator
Microsoft Certified Trainer

Need to support users over the internet? click here try our remote control online beta

Hello,
you can post your query
here rather than in general forum.
Since you are the normal user, you are not authorized to do this activity (clearing of old DNS entries.)
I suggest you to contact the right person who is managing the Domain Controllers and Domains.
Anyways this is can achieved by the concept of DNS Aging/Scavenging.


Regards, Ravikumar P

Need to support users over the internet? click here try our remote control online beta

Aging/scavenging may work but it takes too long. I want to get rid of the entries sooner. And yes, these are all authenticated computers, part of the domain.

Need to support users over the internet? click here try our remote control online beta

I'll post "there", thanks.
The reason I ask here is that the "authorized" person has deleted the old DNS entries multiples times but nonetheless they keep reappearing the same way. And again, I'd like to get rid of the bad records before aging/scavenging takes place.

There is an amazing pack of free network admin tools. click here to download it

Hello Hasm,
Please go through the below thread once, sure it can help you to resolve your query.

http://social.technet.microsoft.com/Forums/en-US/winserverNIS/thread/8419a93c-ac50-49e1-853a-3ecaa351eb9cRegards
, Ravikumar P

There is an amazing pack of free network admin tools. click here to download it

Hello Hasm,
Please go through the below thread once, sure it can help you to resolve your query.

http://social.technet.microsoft.com/Forums/en-US/winserverNIS/thread/8419a93c-ac50-49e1-853a-3ecaa351eb9cRegards
, Ravikumar P

Need to support users over the internet? click here try our remote control online beta

Hi Hasm,

As this thread has been quiet for a while, we assume that the issue has been resolved. At this time, we will mark it as Answered as the previous steps should be helpful for many similar scenarios. If the issue still persists, please feel free to reply this
post directly so we will be notified to follow it up. You can also choose to unmark the answer as you wish.

BTW, wed love to hear your feedback about the solution. By sharing your experience you can help other community members facing similar problems. Thanks for your understanding and efforts.

Best Regards

KevinTechNet Community Support

Need to support users over the internet? click here try our remote control online beta