The Host Name option of the Network Configuration

Configure->NetworkConfig->HostName

The Host Name of the Server is the TCP/IP name that corresponds to its IP Address. You should keep the first part of this name (up to the first full stop) the same as the Windows server name as set in the Windows configuration pages. You may wish to change the domain name part of the address (the part after the first full stop) to fit in with a TCP/IP domain that you already have on your network.

The default value for this field is "thin-nin.lan"