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UFW

sudo ufw status numbered

Status: active
     To                         Action      From
     --                         ------      ----
[ 1] 22/tcp                     ALLOW IN    Anywhere
[ 2] OpenSSH                    ALLOW IN    Anywhere
[ 6] 22/tcp (v6)                ALLOW IN    Anywhere (v6)
[ 7] OpenSSH (v6)               ALLOW IN    Anywhere (v6)

sudo ufw app list full list available at /etc/ufw/applications.d
sudo ufw enable
sudo ufw disable
sudo ufw reload
sudo ufw allow ssh
sudo ufw allow 'Nginx Full'
sudo ufw allow 443/tcp
sudo ufw allow from 192.168.1.1 port 22
sudo ufw allow proto tcp from 192.168.0.1 to any port 22
sudo ufw delete 7

Deleting:
 allow OpenSSH
Proceed with operation (y|n)? y
Rule deleted (v6)

sudo ufw logging on
sudo ufw logging off
sudo iptables -S

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