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Getting Incorrect Subnet

Nirmit79
Nirmit79 asked
on
Medium Priority
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Last Modified: 2009-12-16
I have our internal Subnet as 192.168.1.x but for some reason, some of the machines would start getting their IP addresses in the subnet of 192.168.8.x .. Now I checked on my DHCP server..There is no instance of that subnet mentioned..

When i did IPCONFIG /ALL I found out that the ones taking as 192.168.8.x are showing the following:

IP Address:            192.168.8.25
Subnet Mask:        255.255.255.0
Default Gateway:  192.168.8.1
DNS:                     192.168.8.1
DHCP:                   192.168.8.1


When I tried Pinging 192.168.8.1, it was successful..When I tried to telnet,  it prompt me a password but I failed to login as I could not guess the right password.  I am not sure how to detect the machine and how to solve it.  
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Commented:
I ran into a similar problem when one of my users turned on internet connection sharing. The laptop set itself up to issue addresses. Download a utility called look@lan and install it. Add both networks, 192.168.1.0 and 192.168.8.0 and then run it. It will match ip addresses to computer names which should help you track down the rogue computer.

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Commented:
Thanks for the tip..Which machine would I be downloading it to?

Commented:
You can run it from any machine, just be sure to add both networks so it will search out both subnets
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