This is mostly about setting up a firewall in linux system using a package called Ufw. There are a few important commands to remember or to look for:

1. Enable Firewall
	-sudo ufw enable
2. Activate/deactivate port
	-sudo ufw allow/deny port-number
3. It is always a good idea to check which port is open using:
	-sudo nmap -T Aggressive -A -v 127.0.0.1 -p 1-65000