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  1. 01-23-2011, 06:11 PM #1
    CaptnCAPSLOCK
    CaptnCAPSLOCK is offline Member
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    Default How to list all computer in a network?

    Hi, I'm a newbie in this forum but I have a question...

    What are the possibilities to list all computer in a network?

    I've already wrote a program and it does what it should do but it's really inefficiently. It checks all IP-addresses between two IP's if they're reachable with isReachable(). I had to set the timeout to 2000ms and you can imagine how long it takes to check a whole class C net.

    So far I know is isReachable() implemented by the ECHO-protocol.
    Can I send a request to broadcast and every active PC answers to it? Is that possible? Or what about ARP, NetBios/SMB, LLMNR?

    Anyone has an idea?
    I hope you can help me!
  2. 01-24-2011, 01:12 PM #2
    j2me64's Avatar
    j2me64
    j2me64 is offline Senior Member
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    Quote Originally Posted by CaptnCAPSLOCK View Post
    Anyone has an idea?
    I hope you can help me!

    perhaps you can find some examples with google searching for multicastsniffer
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