Resident windows program that will detect rogue DHCP servers and notify.

Posted on 2012-09-19
Medium Priority
Last Modified: 2012-10-10
I'm looking for a program that will detect rogue DHCP servers AND send out an email notification.  I've found one, but unsure how well it works - hoping to get a demo.  DHCP Sentry.

There are plenty of programs that will detect DHCP servers, I need one that runs and sends out notifications.  Please don't post common programs that only detect DHCP servers.

I'm aware of DHCP snooping, these sites are running older HP 2524 switches which do not support those commands.

Question by:LanMan6401
  • 3
LVL 39

Expert Comment

ID: 38416462
Your network will have performance problems with rogue DHCP servers, also a microsoft DHCP server will shut itself down.

A built in tool ( part of the server admin tool set) is DHCPloc.exe. Run that at the command prompt of your server and see what computers/nodes are giving a DHCPOFF (DHCP offer). Any unauthorized DHCP server is a rogue server to you. So, go into it (most likely through a web page interface) and disable it's ability to provide DHCP to your network.

You will only have to check many once a month or so, or when you start seeing problems with DNS and IP conflicts.

I said most likely through a web interface, and this is what I mean by that. Most rogue DHCP servers end up to be: 1) rogue routers and 2) Mass storage devices. Both, typically have a web page interface.

Author Comment

ID: 38417610
This is a student building, we need something that can actively monitor and give us notifications.  I'm aware of all the programs that can show me this info, I need one that can also notify me.
LVL 78

Expert Comment

by:Rob Williams
ID: 38426974
Microsoft has a little rogue DHCP server detection tool that will look for non-Windows (unauthorized) DHCP servers on the network and can be set to do so at scheduled intervals:

Accepted Solution

LanMan6401 earned 0 total points
ID: 38427375
DHCP Sentry does what we need, thanks for everyone that offered help.

This post can be closed.

Author Closing Comment

ID: 38480870
DHCP Sentry developer confirmed what we needed.

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