To get the hardware address of a rogue DHCP server, follow the steps below on the effected computer:

1) Open Command Prompt.

2) Type arp -a and press Enter.

Outcome

The output is displayed on your screen.

TIP: You can pipe the output to a text file, making it easy to send the information to support personnel.

After retrieving the information, send it to IT Help Central so they can request that network administrators disable the device.