allow ip through ufw
sudo ufw allow from 15.15.15.0/24 to any port 22allow ip through ufw
sudo ufw allow from 15.15.15.0/24 to any port 22ufw deny from ip
# Totally block
ufw deny from 123.456.543 to any
# Block from specific ports
ufw deny from 123.456.543 to any port your_portbootstrap 4
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