Dynamic DNS Facts

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For a Windows 2000/XP/2003 client, the following process is used to dynamically update the DNS database.

1. The client boots and receives an IP address from the DHCP server.
2. The client sends a DNS update request to update the forward lookup record.
3. The DHCP server sends an update request to update the reverse lookup record.



For non-dynamic update clients, the DHCP server sends both the forward and reverse lookup updates. You can also configure the DHCP server to perform both tasks for Windows clients.

To enable dynamic updates, use the following steps:

1. On the Windows DNS server, open the Zone Properties dialog box and enable dynamic updates.
2. In the TCP/IP Properties of the client, make sure dynamic DNS is enabled (enabled is the default setting).
   

Note: You may also need to enable dynamic updates on the DHCP server if you're doing dynamic updates by proxy.

You should know the following facts about secure dynamic DNS:

• Secure dynamic updates are only available for Active Directory-integrated zones.
• To use secure DDNS, a client must be a member of the same Active Directory domain as the DDNS server.
• Only the original client can alter or remove records when using secure DDNS.