Search⌘ K
AI Features

Nmap UDP Scan

Explore how Nmap UDP scans work to detect open and closed UDP ports without a connection handshake. Understand why combining UDP and TCP scans provides a more detailed network security evaluation and improves your penetration testing accuracy.

We'll cover the following...

Nmap UDP scans are more detailed than TCP scans. Generally, TCP scans are used by Nmap to discover ports and services. On the other hand, UDP scans provide much more information regarding running services, rogue hosts, and identification of open UDP ports. Let’s look at how UDP scans work.

How UDP scans work

Unlike TCP, UDP is a connectionless protocol. This means that there’s no three-way handshake or establishing of a connection. There’s only a one-way data transfer when we ...