/etc/default/ufw  IPV6=yes -> mettre en rem #


ufw status

ufw show raw

ufw enable

ufw disable

ufw allow

sudo ufw default deny 

sudo ufw allow 80,443/tcp

ufw deny 53  
ufw deny 53/tcp

ufw delete deny 80/tcp


ufw allow from 192.168.0.4 to any port 22


ufw deny from 207.46.232.182