Nmap is a popular choice for a port scan and for good reason, Nmap has tons of options and is capable of much more than just a port scan.

The goal will be to scan/test the hosted applications/services:

# Basic scan of the first 1000 TCP ports
nmap -sS -n --open

# More intense scanning of open ports
nmap -sT -Pn -n --open -sV -p 42,53,80,88,135,139,389,443,445,464,593,636,1512,3306,3268,3269,3389,8080,8889

You can refer to the Services part.

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