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LAN security

  • 27-04-2010 12:38am
    #1
    NoQuarter
    Registered Users, Registered Users 2 Posts: 4,624 ✭✭✭


    Evening all,

    I've just set up a LAN (not wireless) in my home and i was wondering is there anything i should know about securing it? Theres one desktop and two laptops running into a switch which runs to the outside world!

    Im a bit new to the whole networking thing so any advce appreciated! All systems are running windows XP.

    thanks.


Comments

  • #2
    Jonathan
    Moderators, Education Moderators, Home & Garden Moderators Posts: 8,287 Mod ✭✭✭✭Jonathan


    king-stew wrote: »
    Evening all,

    I've just set up a LAN (not wireless) in my home and i was wondering is there anything i should know about securing it? Theres one desktop and two laptops running into a switch which runs to the outside world!

    Im a bit new to the whole networking thing so any advce appreciated! All systems are running windows XP.

    thanks.
    A switch or a router? A switch would imply that there is no NAT, and every computer has a public IP address. In which case you need to ensure every computer is running a firewall.

    A home router would most likely implement NAT, in which case you are pretty safe already.
    Just be aware of forwarding any ports, IPv6 tunnelling and any other services which permit NAT traversal. Disable any remote access to the router itself, and if that is not possible only use SSH (Public key, password disabled, run on a non standard port) to access your router externally.


  • #3
    NoQuarter
    Registered Users, Registered Users 2 Posts: 4,624 ✭✭✭NoQuarter


    Jonathan wrote: »
    A switch or a router? A switch would imply that there is no NAT, and every computer has a public IP address. In which case you need to ensure every computer is running a firewall.

    A home router would most likely implement NAT, in which case you are pretty safe already.
    Just be aware of forwarding any ports, IPv6 tunnelling and any other services which permit NAT traversal. Disable any remote access to the router itself, and if that is not possible only use SSH (Public key, password disabled, run on a non standard port) to access your router externally.

    Definitely a switch! No router involved!


  • #4
    Jonathan
    Moderators, Education Moderators, Home & Garden Moderators Posts: 8,287 Mod ✭✭✭✭Jonathan


    king-stew wrote: »
    Definitely a switch! No router involved!
    Every PC has a public IP address so?


  • #5
    NoQuarter
    Registered Users, Registered Users 2 Posts: 4,624 ✭✭✭NoQuarter


    Yeah all PC's have been assigned a public IP address! for some reason...

    But it makes my life easier so no complaints! :D

    So security?


  • #6
    TouchingVirus
    Registered Users, Registered Users 2 Posts: 8,582 ✭✭✭TouchingVirus


    If you're using a switch then you will need to ensure firewalls are running/active on all three machines as each machine is a separate point of entry to your network.

    You could also lockdown LAN traffic and only open what you need open between the three computers on the switch, just for extra security (all done through the firewalls on each machine individually).


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