Windows 2000 Server and Windows Server 2003 both include a featured called Dynamic Domain Name Systems(DDNS), which enables the server to automatically update host (A) and pointer (PTR) records for client computers. Windows 2000 and later clients can directly request updates of their records, while the server can update records for other clients, such as those running Windows 98. DDNS makes it possible to maintain accurate client host records in DNS even when those clients take their IP addresses from DHCP.

You configure DDNS at the client side through the TCP/IP properties for a network interface. Follow these steps:

1. Open the Network And Dial-Up Connections folder, right-click an interface, and choose Properties.

2. Select Internet Protocol (TCP/IP) and click Properties.

3. Click Advanced on the General tab to open the Advanced TCP/IP Settings dialog box.

The DNS tab contains the options that control DDNS; it's up to you to decide which option meets your needs. The option Register This Connection's Addresses In DSN causes the client to attempt to register the host name specified in the Network Identification tab of the computer's System Properties dialog box (right-click My Computer and choose Properties).

The option Use This Connection's DNS Suffix In DNS Registration causes Windows to attempt to register the computer's connection-specific DNS suffix, as specified on the DNS tab, with the DNS server.