Find IP Address on Network

Posted on 2007-10-15
Last Modified: 2010-04-10
It is possible to see which IP addresses are connecting to a certain commericial network that is used by many folks on the Internet?  If so, how?
Question by:jaseverson
    LVL 3

    Expert Comment

    There are several options.  If you have a cisco router that connects you to the internet you could use netflow.  Depending on which firewall you have their may be logs so you could search through those.
    LVL 1

    Expert Comment

    What kind of protocol is used ?
    do you want to monitor out going trafic to a specific subnet ?
    We need so more details on what you're trying to do.

    Author Comment

    I would like to know how many employees from ABC Corporation are connecting to a certain network that is maintained by a software company that sells a  PC connectivity product.  Is that possible?
    LVL 2

    Expert Comment

    Try AdvancedIPScanner from  It's a free product and works well to do what (I think) you want.

    Author Comment

    Tonydave67...I  am looking for a product that will let me search for certain IP address ranges that are connected to certain networks on the internet....not on my LAN.  Is that possilbe?  If so, how?

    LVL 16

    Accepted Solution

    >It is possible to see which IP addresses are connecting to a certain
    >commericial [sic] network that is used by many folks on the Internet?

    Do you have administrative access to the commercial network in question?  If not, then no.  If yes, then you could use ethereal/wireshark, iptraf, ntop, to name a few...


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