To Configure TCP/IP In Windows NT:
Start the Windows NT Server computer and logon as the administrator.
From the Windows desktop, click Start>Settings>Control Panel>Network Icon.Â
The Network dialog is displayed.
Click the Protocols tab to see the list of protocols already installed on the computer. If TCP/IP is already installed on the computer, you will see TCP/IP Protocol in the list of components. Proceed to Step 5.
If TCP/IP Protocol is not in the list of protocols, click Add.Â
The Select Network Protocol dialog is displayed.
o Click TCP/IP Protocol in the Network Protocol list.
o Click OK.Â
  The TCP/IP Protocol is added to the list of protocols.
Click TCP/IP Protocol in the Network Protocol list.
Click Properties.Â
The Microsoft TCP/IP Properties dialog is displayed.Â
Enter the details of the IP settings of the computer here.
o Click the IP Address tab.
o Click Specify an IP address.
o Type the IP address of the computer in IP address.
o Type the sub-net mask of the network in Sub-net mask.
o Click OK.
If you are now prompted to restart the computer, click Yes.