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Posted by / 03-Apr-2017 03:09

Ptr not updating records in dns

I've stumbled upon a strange behaviour with Windows machines, which seems to be fairly consistent between all Windows versions from Vista/2008 to 8.1/2012 R2; it doesn't happen instead when using Windows XP or Windows Server 2003.

The problem is this: when the network adapter is configured for DHCP and the DHCP server doesn't register DNS records on behalf of its clients (because it can't, or because it's not configured to do so), then A friend not on SF said: "That's normal, PTR is only updated by DHCP in Win2K ".

The DNS Client service and the DNS Server service support the use of dynamic updates, as described in Request for Comments (RFC) 2136, "Dynamic Updates in the Domain Name System." The DNS Server service allows dynamic update to be enabled or disabled on a per-zone basis at each server that is configured to load either a standard primary or directory-integrated zone.

By default, the DNS Client service dynamically updates host (A) resource records in DNS when the service is configured for TCP/IP.

By default, computers that are statically configured for TCP/IP attempt to dynamically register host (A) resource records and pointer (PTR) resource records for IP addresses that are configured and used by their installed network connections.

By default, all computers register records based on their fully qualified domain name (FQDN).

The forward DNS entries ("A" records) for windows machines on the domain are populated automatically.

However, the reverse DNS entries ("PTR" Records) are not.

DHCP This will open DHCP MMC snapin now you need to right click on your DHCP select properties this will bring properties windows now click on DNS tab under this select “Always dynamically Update DNS A and PTR Records.Yes, but it might not create the reverse lookup zone by default.Take a look at this technet article explaining how to setup a reverse lookup zone.If so, your DHCP server may not be configured to auto-register their IP with the DNS server.To check, right-click your DHCP scope and go to properties.

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Those records have an ACL on them to stop registered records from being hijacked by other hosts.

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