Question

The CorpDC server is the DNS server for the subnet. The CorpDHCP12 server is the DHCP server for this subnet. All clients are running Windows 7 or Window 8 and receive their IP addresses and other TCP/IP configuration information from the CorpDHCP12 server.

You want DNS to be updated automatically with the A and PTR records for all hosts in the CorpNet domain. When you check the DNS server, you discover that although host records have been created automatically, the corresponding PTR records have not been created. Examine the DNS and DHCP configurations to diagnose and correct the problem.

Both CorpDC and CorpDHCP12 run as Hyper-V guests on CorpServer.

Answer 1

To fix the problem with PTR records not being created automatically in the DNS server, check the DNS and DHCP configurations. In the DNS configuration, enable the option to update DNS records only if requested by DHCP clients. In the DHCP configuration, enable the option to always dynamically update DNS A and PTR records.

Step-by-step explanation:

The problem is that although host records have been created automatically in the DNS server, the corresponding PTR records have not been created. PTR records are used to map IP addresses to hostnames, allowing reverse DNS lookup. To diagnose and correct the problem, you should check the DNS configuration and the DHCP configuration.

In the DNS configuration, ensure that the option 'Automatically update DNS records only if requested by the DHCP clients' is enabled. This will ensure that the DHCP server sends the necessary requests to the DNS server for PTR record updates.

In the DHCP configuration, make sure that the 'Always dynamically update DNS A and PTR records' option is enabled. This will allow the DHCP server to update both the A and PTR records in the DNS server when assigning IP addresses to clients.