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Block Internet, Allow LAN?

Discussion in 'Networking' started by Codemaster, Feb 9, 2007.

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  1. Codemaster

    Codemaster Thread Starter

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    What is the easiest way to block a program from the internet, but still allow it access to LAN?
     
  2. etaf

    etaf Moderator

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    unplug the router/modem from the telephone/cable line
     
  3. Bob Cerelli

    Bob Cerelli

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    Could you explain in more detail what you mean by "block a program from the internet".

    For example, do you want no Internet access for any computer?
    Do you just want to block something like the Internet Explorer but allow your anti-virus program to get updates?
     
  4. Codemaster

    Codemaster Thread Starter

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    I'm at college, so I need a software solution that would allow me to do what your example states. I want to block a program from communicating with the internet, but still allow it to have access to lan. Or if there is a way to turn off my computers internet completely, but still have access to lan, that would work too.
     
  5. Bob Cerelli

    Bob Cerelli

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    One way is to misconfigure TCP/IP on the computers with an incorrect gateway IP. Then computer's can't get to the Internet but can access their local network. Just make sure the users don't have admin rights to change it back.
     
  6. JohnWill

    JohnWill Retired Moderator

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    You can also install a software firewall and limit just that application from Internet access while allowing other applications through.
     
  7. Bob Cerelli

    Bob Cerelli

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    Zone Alarm is a pretty common program that may be able to this for you.

    Same thing would apply about not giving user's the rights to just change it back again.
     
  8. Codemaster

    Codemaster Thread Starter

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    How do I do this?
     
  9. Bob Cerelli

    Bob Cerelli

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    Log on with an account that has admin rights
    Go into the Local Area Connection Properties
    Open TCP/IP properties
    Put in something like 1.1.1.1 for the gateway address.
     
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