DNS

A Domain Name Service (DNS) restores IP addresses into host names. When a web browser connects to your server, the server gets only the client’s IP address, for example, 198.18.251.30. The server does not have the host name information, such as www.example.com. For access logging and access control, the server can resolve the IP address into a host name. On the Configure System Preferences page, you can tell the server whether or not to resolve IP addresses into host names.