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How do I find rogue IP addresses?

Posted on 2009-05-07
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Last Modified: 2012-05-06
I set up a Windows 2003 DHCP server, but 3 of the addresses are flagged in the DHCP server as BAD ADDRESSES. They show a unique ID in the column where MAC addresses normally show up. The IDs are e50110ac, f70110ac, and e80110ac.

One will respond to pings, the other two dont. If I delete them from the DHCP list they come back as bad addresses again.

How can I find these on the network without a lot of manually searching?
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Question by:Eric_Price
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by:Bembi
Comment Utility
Is it possible, that these IPs are printers or other devices like NAS devices or something similar?

The device your can ping, can you resolve the name? (ping -a xxx)
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omarfarid earned 500 total points
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you check arp table after pinging ip and then get mac address, use command

arp -a
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