Troubleshooting Core Services: Diagnosing a Rogue DHCP Server

The Scenario

A segment of workstations on the local subnet suddenly lost access to internal intranet resources and the external gateway. Affected machines were drawing unusual IP addresses outside the standard corporate allocation scope.

Step-by-Step Investigation

1. Inspected Local TCP/IP Stack: Ran a basic configuration check on an affected endpoint:

   ipconfig /all