Three Non Windows Programs Taking IP's On Network

[Zen]

I have a quick question I was wondering if anyone has dealt with this and how they took care of it. I ran Look@Lan on my network and found 5 non-windows items on my network. 1 of them is the gateway, 1 of them is an as400, but 3 of these items seem to be game related things taking up IP's on my network. Look@Lan gives me the IP and the ports these things are using (1. Free Internet Chess Sever, 2. Doom Id Software, and the 3rd I'm really not to sure about). Now I can ping these IP's, but I can't seem to find out which user computers they are installed on. Is there anyway of homing in on these bad boys??

Thanks

[dedub]

If there are not that many computers you could go to each one and Cntr, Alt Del, and check the services that are running.

You could also do a NBTSTAT -A "IP ADDRESS" without the qoutes in a cmd prompt. That should give you the name of the maching that has that address.

If your network is a running DHCP then all you have to do is look at the DHCP leases on the sever, or router.

If your running 2003 with Active directory then you could find out several more ways. (if of course you have an admin account.)
Im sure there are even more ways, but those are off the top of my head

[Zen]

Hey thanks for the reply

Thats the weird thing the IP addresses aren't showing up in the DHCP leases as being used and there are to many computers to go desktop to desktop and hunt for em and I'm not getting a netbios name or a host name for the IP addresses...Grrrr

[dedub]

A few things come to mind. Someone could of manually typed in the IP and gained access? If you are the admin is it possible to filter traffic at the gateway or router? I would even consider a packet sniffer and see what is getting passed back and forth, how often, and how much traffic. You could then detect a pattern and narrow the cultrip?