Listing All DHCP Servers

by Mitch Tulloch [Published on 9 Aug. 2005 / Last Updated on 9 Aug. 2005]

Want to know the DNS names and IP addresses of all DHCP servers on your network?

Want to know the DNS names and IP addresses of all DHCP servers on your network? If you're using Active Directory it's easy, just open a command prompt and type netsh dhcp show server and a list of DHCP servers authorized in AD will be displayed.

But what about rogue DHCP servers? These are not displayed, and the only way you can scan for such DHCP servers is to use a sniffer like Network Monitor to capture all DHCP broadcast traffic on your network. Leave Network Monitor running for some time however to do this since most DHCP leases are 8 days or so.

 

The Author — Mitch Tulloch

Mitch Tulloch is a widely recognized expert on Windows administration, networking, and security. He has been repeatedly awarded Most Valuable Professional (MVP) status by Microsoft for his outstanding contributions in supporting users who deploy and use Microsoft platforms, products and solutions. Mitch has published over two hundred articles on different IT websites and magazines, and he has written or contributed to almost two dozen books and is lead author for the Windows 7 Resource Kit from Microsoft Press. For more information, see www.mtit.com .

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