install ufw sudo apt-get install ufw
check status sudo ufw status
add rule sudo ufw allow 22
sudo ufw allow from 129.188.2.3
remove sudo ufw deny 22
remove sudo ufw delete 22
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install ufw sudo apt-get install ufw
check status sudo ufw status
add rule sudo ufw allow 22
sudo ufw allow from 129.188.2.3
remove sudo ufw deny 22
remove sudo ufw delete 22