Creating or editing a Ubuntu Firewall

Right now SSH(port 22) is only active for certain ip addresses. Port 80 HTTP and port 443 HTTPS are active for all.

Enabling

sudo ufw enable

Get a list of all active rules

sudo ufw status

Response

443                        ALLOW       Anywhere                  
80                         ALLOW       Anywhere                  
22                         ALLOW       12.34.56.78              
443 (v6)                   ALLOW       Anywhere (v6)             
80 (v6)                    ALLOW       Anywhere (v6)             

Add a ip address for SSH

Go to https://www.google.com/search?q=whats+my+ip to find your IP address.

Replace 12.34.56.78 with your IP.

sudo ufw allow from 12.34.56.78 to any port 22