Configuring UFW Firewall

Install UFW Firewall

sudo apt install ufw

Allow inbound connections on a specific port and protocol

sudo ufw allow <port>/<protocol>

Example to allow TCP port 80

sudo ufw allow 80/tcp

Allow inbound connections on a specific port for any protocol

sudo ufw allow <port>

Enable UFW Firewall

sudo ufw enable

Check UFW Firewall Status

sudo ufw status

Optionally block pings

sudo nano /etc/ufw/before.rules

Scroll down to ok icmp codes for INPUT and insert the following line before  the other lines:

-A ufw-before-input -p icmp --icmp-type echo-request -j DROP