Dhcp not updating dns ptr records
In this mode, the DHCP server always performs updates of the client’s FQDN, leased IP address information, and both its host (A) and pointer (PTR) resource records, regardless of whether the client has requested to perform its own updates.” “With secure dynamic update, only the computers and users you specify in an ACL can create or modify dns Node objects within the zone.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.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.The use of Name Protection in the Windows Server® 2008 R2 operating system prevents name squatting by non-Windows-based computers.Also, if all servers, including DCs, are automatically updating their own record, then there is no fear of losing their records, because for one, their records (timestamps) are current, therefore scavenging won’t touch them, and two, Windows Servers by default will update their records every 24 hours, with the exception of domain controllers at every 60 minutes.Therefore, even if they were to scavenge these records, assuming the time stamp has ever been reached, the machines will refresh themselves anyway!
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.
This happens even though DHCP registered the record.
This is because DHCP doesn’t own the record, the client does, even though DHCP registered it.
By default, statically configured clients and remote access clients that do not rely on the DHCP server for DNS registration, will re-register their A & PTR records dynamically and periodically every 24 hours.
This applies to Windows 2000 Professional and all newer operating systems.Well, I will also offer the nitty gritty below the summary for those who want to read. But DHCP will register its PTR (reverse entry) record.