25 Mar 2020
The -sT tells nmap to scan for TCP ports and -p- to scan for all 65535 ports. If -p- is not used nmap will scan only 1000 ports.
nmap -sT -p- 10.10.8.8
To scan for UDP ports use -sU instead of -sT:
sudo nmap -sU -p- 10.10.8.8
For example to scan for open TCP ports on a remote machine with IP address 10.10.8.8 in the range 20-80 you would use the following command:
nc -z -v 10.10.8.8 20-80