Solved

A device stole my gateway address

Posted on 2006-11-29
5
379 Views
Last Modified: 2010-08-05
A device on my network stole the ip address used for my pix 515 192.168.1.1

How do I find it?
0
Comment
Question by:darovitz
  • 3
  • 2
5 Comments
 

Author Comment

by:darovitz
ID: 18041251
It looks as if it is a wireless access point by Linksys.
0
 
LVL 43

Accepted Solution

by:
Steve Knight earned 500 total points
ID: 18041389
Turn your gateway off then from a device on the same subnet .... telnet to it, ping it, nbtstat -A 192.168.1.1, http://192.168.1.1 it... to see what it is then look in your switch tables for the mac address reported in your arp tables (ARP -A) and nuke it!

Altenative of course if send an email around "The person who has just plugged unauthorised equipment into the LAN has 5 minutes to remove it or be fired!"... if only!
0
 
LVL 43

Expert Comment

by:Steve Knight
ID: 18041395
Sorry didn't come out so clear, I mean

PING 192.168.1.1
arp -a
Get the mac address, look in your switch tables for that mac.

Steve
0
 

Author Comment

by:darovitz
ID: 18042321
Someone plugged in a router to share their connection with someone else in their office.  Thanks so much.
0
 
LVL 43

Expert Comment

by:Steve Knight
ID: 18042382
no problem, hope it helped.  Don't suppose they  let you sack the person, oh well :-)
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

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

A brief overview to explain gateways, default gateways and static routes OR NO - you CANNOT have two default gateways on the same server, PC or other Windows-based network device. In simple terms a gateway is formed when a computer such as a serv…
Have you ever set up your wireless router at home or in the office to find that you little pop-up bubble in the bottom right-hand corner of Windows read "IP Conflict - One of more computers on the network have been assigned the following IP address"…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

803 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