Solved

Getting response from unknown ip address

Posted on 2013-10-28
6
651 Views
Last Modified: 2013-10-28
Here is a weird one (for me anyway).

I want to set a static ip on a users desktop to 192.168.1.193, but get a conflict every time. We have no record of assigning that address (it is outside of our DHCP pool). When I ping it, I get a response, but when a do a "pathping" I don't get anything.

Is there any way to display the device name, or anything, holding this ip address? Or is there someway to disable/block it (then see who screams)?

Any help would be greatly appreciated.
0
Comment
Question by:djstewartnc
  • 3
  • 2
6 Comments
 
LVL 6

Expert Comment

by:LHT_ST
ID: 39605722
you could try running the command "nbtstat -a" from the command line, this would give you the mac address of the offending item.

if you have some kind of network infrastructure you should be able to trace the mac address to a port - then its either close the port and see who screams or trace the patching to see where it goes.
0
 
LVL 13

Accepted Solution

by:
Daniel Helgenberger earned 500 total points
ID: 39605729
You can use arp to get the MAC-Address. This usually tells you at least the vendor of the network card, giving you a clue what device it may be; since it looks in your arp cache ping it first:
ping 192.168.1.193
arp 192.168.1.193

Open in new window

If you still cannot find it, your (managed) switch can show the switch port where it connects to. If everything else fails, block that MAC on the switch.
0
 

Author Comment

by:djstewartnc
ID: 39606022
Still working on it. Can't work a solution that requires a MAC address .... because I can't get it anywhere. Have considered blocking it from the Sonic Wall and see who screams ... but if no one does, I still need that ip address ....


I don't know ....

More suggestions?
0
How Do You Stack Up Against Your Peers?

With today’s modern enterprise so dependent on digital infrastructures, the impact of major incidents has increased dramatically. Grab the report now to gain insight into how your organization ranks against your peers and learn best-in-class strategies to resolve incidents.

 

Author Comment

by:djstewartnc
ID: 39606030
My bad ... sorry guys. Using the arp -a wrong. Got my MAC address. Thanks for all the help.
0
 

Author Closing Comment

by:djstewartnc
ID: 39606035
Great help. Confused over configuration of the arp -a command. Without the ip address it worked like a champ.
0
 
LVL 13

Expert Comment

by:Daniel Helgenberger
ID: 39606041
Glad you could resolve the issue!
Hm, did not see the OS, did not know it is not implemented in Windows either - see what happens when Microsoft ports Unix commands ;)
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Losing network connectivity 8 110
Cannot Change Local DNS 9 63
Change scan to folder settings on HP LaserJet M5035 MFP Series printer 1 54
logon time 6 37
Are you one of those front-line IT Service Desk staff fielding calls, replying to emails, all-the-while working to resolve end-user technological nightmares? I am! That's why I have put together this brief overview of tools and techniques I use in o…
The use of stolen credentials is a hot commodity this year allowing threat actors to move laterally within the network in order to avoid breach detection.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

839 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