How to disable Internet connection without disabling the LAN/network ?

How to disable Internet connection without disabling the LAN/network ?

Hi, I am using Windows XP operating system. I want to block internet access without disabling LAN settings. How to do this? Is it possible?

Thanks in advance.

 From the Start menu, select either Control Panel, or Settings and then Control Panel.


  
 Double-click Network Connections, and then Local Area Connection. In the Local Area Connection Status dialog box that appears, click Properties.










Click to highlight Internet Protocol [TCP/IP] , and then click the Properties button.



  
 Select the radio button for Use the following IP Address, and enter the IP address of your computer.

   Enter the correct code for the "Subnet Mask" field.

    Enter the correct information for the "Default Gateway" field, in this case that would be deleting all the        information.

   Enter the correct information in the "Preferred DNS Server" field and the "Alternate DNS Server" field, in this case that would be deleting all the information. .

   "OK" your way out of the properties.