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connect to the lan but not the internet.

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  • 26-11-2015 10:53pm
    #1
    Closed Accounts Posts: 68 ✭✭


    i have 3 pc's on a lan. I want to add a fourth which i want to be able to connect to the lan but not the internet. How will i do this

    I wan to move files between fourth pc and lan. could i have internal vpn?


Comments

  • Registered Users Posts: 1,299 ✭✭✭moc moc a moc


    Give the fourth PC a static IP address on your LAN with no default gateway. Done.


  • Closed Accounts Posts: 68 ✭✭perry123


    Give the fourth PC a static IP address on your LAN with no default gateway. Done.
    will i be able to communicate with the lan with PC a static IP address on the fourth? How do i make no default gateway?


  • Registered Users Posts: 6,163 ✭✭✭ZENER


    perry123 wrote: »
    will i be able to communicate with the lan with PC a static IP address on the fourth? How do i make no default gateway?

    So long as the static IP address you assign to the 4th PC isn't already used but in the same network subnet then you should have no problems.

    For example: If the other PCs have addresses like :

    192.168.1.xxx

    Then assign your 4th PC with an address like 192.168.1.xxx where xxx is any number between 1 and 254 but not already used by any other device. Try a random number like 139 for example.

    tumblr_me3du9KDaz1rtwokd.png

    The above is where the IP address, DNS and Gateway are entered. In your case do not enter anything in the Default Gateway section.

    Ken


  • Closed Accounts Posts: 68 ✭✭perry123


    ZENER wrote: »
    So long as the static IP address you assign to the 4th PC isn't already used but in the same network subnet then you should have no problems.

    For example: If the other PCs have addresses like :

    192.168.1.xxx

    Then assign your 4th PC with an address like 192.168.1.xxx where xxx is any number between 1 and 254 but not already used by any other device. Try a random number like 139 for example.


    The above is where the IP address, DNS and Gateway are entered. In your case do not enter anything in the Default Gateway section.

    Ken
    Thanks. if any malware got to the lan could it spread to the fourth? Culd i havvejust one folder of the fourth shared with the lan? The fourth is an old one and will only be used for light. i do not want to bother with any security on it hence do not want it on internet.

    had to remove your image as i cannot do urls


  • Registered Users Posts: 6,163 ✭✭✭ZENER


    Once you connect a computer to a LAN there is always the chance of some infection spreading to it. Some Malware can spread by detecting other computers and spreading to them but usually it takes some action on the users side to install the malware or virus.

    If you're that worried perhaps installing a light Linux Distro on the 4th PC and sharing out a folder to the rest of the LAN is the way to go ? Mint is a nice easy to live with OS.

    Another option is to install Windows PE to it and create a share using the command line, this greatly reduces the attack area of the system.

    Ken


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  • Closed Accounts Posts: 68 ✭✭perry123


    ZENER wrote: »
    So long as the static IP address you assign to the 4th PC isn't already used but in the same network subnet then you should have no problems.

    For example: If the other PCs have addresses like :

    192.168.1.xxx

    Then assign your 4th PC with an address like 192.168.1.xxx where xxx is any number between 1 and 254 but not already used by any other device. Try a random number like 139 for example.

    tumblr_me3du9KDaz1rtwokd.png

    The above is where the IP address, DNS and Gateway are entered. In your case do not enter anything in the Default Gateway section.

    Ken
    should default gateway be 192.168.1 254?. If there is a default gateway the static ip pc should be able to connect to net?


  • Registered Users Posts: 6,163 ✭✭✭ZENER


    The address of the Default Gateway will be the IP of your router - theoretically it can be any address in the subnet but typically it's set to 192.168.1.1 or 192.168.1.254 depending on your providers default settings. Most Eircom routers I've seen are 192.168.1.254.

    On a DHCP enabled computer you can find the Gateway address by typing ipconfig at a command prompt. By not entering any value or by entering 0.0.0.0 you're giving the computer no path out of the subnet hence it can't get to the internet.

    Ken


  • Closed Accounts Posts: 68 ✭✭perry123


    ZENER wrote: »
    The address of the Default Gateway will be the IP of your router - theoretically it can be any address in the subnet but typically it's set to 192.168.1.1 or 192.168.1.254 depending on your providers default settings. Most Eircom routers I've seen are 192.168.1.254.

    On a DHCP enabled computer you can find the Gateway address by typing ipconfig at a command prompt. By not entering any value or by entering 0.0.0.0 you're giving the computer no path out of the subnet hence it can't get to the internet.

    Ken
    Thanks I was trying with an old xp. I gave it a static ip and default gateway but it would not connect to net?


  • Registered Users Posts: 3,318 ✭✭✭davo2001


    perry123 wrote: »
    Thanks I was trying with an old xp. I gave it a static ip and default gateway but it would not connect to net?

    What about DNS? If you're so concerned about security then why are you using XP? It's no longer supported.


  • Closed Accounts Posts: 68 ✭✭perry123


    davo2001 wrote: »
    What about DNS? If you're so concerned about security then why are you using XP? It's no longer supported.
    it does not need tobe as it won't be on net. i was only practising with the settings


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