Solved

How do I find rogue IP addresses?

Posted on 2009-05-07
2
433 Views
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?
0
Comment
Question by:Eric_Price
2 Comments
 
LVL 35

Expert Comment

by:Bembi
ID: 24328335
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)
0
 
LVL 40

Accepted Solution

by:
omarfarid earned 500 total points
ID: 24332777
you check arp table after pinging ip and then get mac address, use command

arp -a
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Organizations create, modify, and maintain huge amounts of data to help their businesses earn money and generally function.  Typically every network user within an organization has a bit of disk space to store in process items and personal files.   …
by Batuhan Cetin Within the dynamic life of an IT administrator, we hold many information in our minds like user names, passwords, IDs, phone numbers, incomes, service tags, bills and the order from our wives to buy milk when coming back to home.…
A short film showing how OnPage and Connectwise integration works.
This is a video that shows how the OnPage alerts system integrates into ConnectWise, how a trigger is set, how a page is sent via the trigger, and how the SENT, DELIVERED, READ & REPLIED receipts get entered into the internal tab of the ConnectWise …

914 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now