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By default, the ACL gives Create permission to all members of the Authenticated User group, the group of all authenticated computers and users in an Active Directory forest.This means that any authenticated user or computer can create a new object in the zone.
The way to get around this is you can configure DHCP’s Option 081 to update the record for all client, no matter if the client asks or not.If there is a problem with PTRs getting updated even after configuring credentials, please see this article: DHCP server processes expired PTR resource records in Windows Server 2003 . The use of Name Protection in the Windows Server® 2008 R2 operating system prevents name squatting by non-Windows-based computers.Name squatting does not present a problem on a homogeneous Windows network where Active Directory® Domain Services (AD DS) can be used to reserve a name for a single user or computer.” DHCP Step-by-Step Guide: Demonstrate DHCP Name Protection“Name squatting occurs when a non-Windows-based computer registers in Domain Name System (DNS) with a name that is already registered to a computer running a Windows® operating system.Technet says something about setting option 81 but I don't even have an option 81. I assume this is set, but on the client network adapter under your ipv4 or 6 properties and then advanced, under the dns tab you have the option "Register this connections address in DNS" checked correct? We are experiencing the same thing in our environment. It seems to occur once every couple of days and only on our 2012 R2 DC not on the other 2003 DCs in the forest.On the server that has a 'missing' DNS record - if I do ipconfig /registerdns - then it is put back in. Obviously that only band-aids that one server and doesn't fix the root problem.
Additionally if you have a DHCP 2012 failover environment and credentials are not configured for those devices which do not have their own account in AD, each server will register those devices with it's own name as the owner of record so should the device renew it's lease on the alternate server that server will not have permission to update the record - hence I can't see a way around using credentials on both sides (and consequently scripting the setting of permission on the records already owned by the server)no, it seems the issue was that I had it set to secure updates only and for some reason none of these machines wanted to do it that way.