Find IP Address on Network

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?
jaseversonAsked:
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The--CaptainConnect With a Mentor Commented:
>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...

Cheers,
-Jon
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mhequipitMH IT DeptCommented:
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.
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tonuxCommented:
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.
regards
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jaseversonAuthor Commented:
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?
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tonydav67Commented:
Try AdvancedIPScanner from radmin.com.  It's a free product and works well to do what (I think) you want.
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jaseversonAuthor Commented:
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?

Thanks
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