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the risks if any of putting a non company pc/laptop on LAN

  • 01-10-2010 4:44pm
    #1
    k123456
    Registered Users, Registered Users 2 Posts: 2,185 ✭✭✭


    To settle a discussion at work today, can anyone tell me the risks if any of putting a non company pc/laptop on LAN

    Imagine I work for abc ltd

    A visitor (does not work for abc ltd) meets someone in abc ltd offices ,connects a network cable into his laptop, boots up laptop, he will get an ip address from DHCP server, once he has an ip address , what can he do

    Could he get to our system, other pc's on LAN, servers , routers etc

    Imagine he has/trojan on laptop, can this infect our interfere with our systems

    Using a simple ipconfig command he can get his ip address , and can easily guess other ip addresses

    Not sure if this is the case, but he clicks on network neigbourhood, would he see other pc's etc on network


Comments

  • #2
    Spear
    Moderators, Computer Games Moderators, Technology & Internet Moderators, Help & Feedback Category Moderators Posts: 25,760 CMod ✭✭✭✭Spear


    k123456 wrote: »
    To settle a discussion at work today, can anyone tell me the risks if any of putting a non company pc/laptop on LAN

    Imagine I work for abc ltd

    A visitor (does not work for abc ltd) meets someone in abc ltd offices ,connects a network cable into his laptop, boots up laptop, he will get an ip address from DHCP server, once he has an ip address , what can he do

    Could he get to our system, other pc's on LAN, servers , routers etc

    Imagine he has/trojan on laptop, can this infect our interfere with our systems

    Using a simple ipconfig command he can get his ip address , and can easily guess other ip addresses

    Not sure if this is the case, but he clicks on network neigbourhood, would he see other pc's etc on network

    Seeing machines in network neighbourhood would be the least of the problems. Setting a packet sniffer running to grab passwords, emails etc would be more worrisome. Or just starting a port scanner to see who's sharing things would leak a lot of info.


  • #3
    k123456
    Registered Users, Registered Users 2 Posts: 2,185 ✭✭✭k123456


    Spear wrote: »
    Seeing machines in network neighbourhood would be the least of the problems. Setting a packet sniffer running to grab passwords, emails etc would be more worrisome. Or just starting a port scanner to see who's sharing things would leak a lot of info.

    Hi Spear

    Thanks for the reply

    tell us more about packet sniffer or port scanner, reason I ask , in work today, I was told OK to out non company laptop on our LAN, I have heard before in another company it is risky, but I do not know exactly why it is risky


  • #4
    Spear
    Moderators, Computer Games Moderators, Technology & Internet Moderators, Help & Feedback Category Moderators Posts: 25,760 CMod ✭✭✭✭Spear


    k123456 wrote: »
    Hi Spear

    Thanks for the reply

    tell us more about packet sniffer or port scanner, reason I ask , in work today, I was told OK to out non company laptop on our LAN, I have heard before in another company it is risky, but I do not know exactly why it is risky

    How could it not be risky? You're potentially exposing everything, business plans, customer data etc. Whoever said it was okay to allow an unchecked foreign machine on your network shouldn't be still employed. Your company has a firewall and locks on the doors for good reasons.


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