From the course: Troubleshooting Network Connectivity
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Rogue DHCP
- [Narrator] I have personally maintained department networks for over a decade, and nothing used to wreak havoc like a rogue DHCP server. A rogue is nothing more than an unauthorized DHCP server on a network. First, I'll cover techniques to trouble shoot and mitigate a rogue. Then I'll cover a couple of methods to prevent it. A rogue DHCP server can show up for a couple of reasons. A rogue can be used to perform a man-in-the-middle attack. A malicious user can hand out IPs to other hosts, becoming a default gateway for them. Traffic proxying through an attacker can be manipulated or collected. It's far more common for a user to incorrectly plug in a device. In apartment networks, it usually follows a fairly predictable path. I will receive a call from a user saying "I can't get to the internet." At this point, I'll ask when the issue started. This will help me figure out if they are a brand new user or if the service suddenly stopped working. I'll determine if they are plugged…
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