● UDP Scan,
● Slower
● Combine it with other scans
● Closed ports, delays UDP scan

sudo nmap -sU -v vps.chrisjanel.eu

If marked as Open:Filter than scan with version detection:

nmap 192.168.1.1 -sU -v -sV

If ports are closed, speed up UDP scan with -host-timeout

nmap emoh.dyndns.info -sU -v -sV --host-timeout 2m

Improving UDP scan results with version detection

nmap -sUV -T4 scanme.nmap.org

Speeding Up UDP Scans

nmap -sUV -T4 -F --version-intensity 0 scanme.nmap.org

(-F scans only the top 100 ports)

Links

• https://nmap.org/book/scan-methods-udp-scan.html