monitoring/scanning DHCP clients
 

I have around 100 XP Professional clients who get IPs from a Netware DHCP pool. I want to scan these clients for any port changes on a weekly basis using nmap and also want to monitor their download pattern using any Linux based tools. The issue is that the IPs change everyday making it impossible to determine which user was using a particular machine on a given day. It is also not feasible for me to remember 100 MAC address. Is there any way to track the changes?

Thanks.

If your clients send a hostname or client identifier, you can associate the IP address (and for further identification purposes the MAC) using that. See 'man dhcpd.leases' (or the equivalent for Netware).