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- Rogue DHCP remediation begins with preventing established, legitimate DHCP servers, such as NIOS appliances supporting the DHCP service, from being identified as a rogue server. You compile all legitimate DHCP servers on the network into the ACM Allowed DHCP Servers list (Config Management > Job Management > Lists);
- Because the Rogue DHCP jobs are issue-driven, a suspected rogue device may first need to be detected by NetMRI. Ensure fingerprinting is enabled in the NetMRI system (Settings > Setup > Network Polling > Fingerprinting checkbox);
- Also ensure that the required user accounts get the appropriate notifications when Rogue DHCP events occur. Consult the topic Defining a Job Notification for specific information.
- NetMRI also scans the standard DHCP TCP and UDP ports (check settings in (Settings > Setup > Network Polling and enter "bootp" as the search string in the Port Scan List).
- The NIOS administrator account username and password should be added to Advanced Settings (Settings icon> General Settings > Advanced Settings > page to the NIOS Administrator category).
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