Firewall configuration (UFW)
UFW Firewall
Installation
apt install ufw
Basic configuration
# Default rules
ufw default deny incoming
ufw default allow outgoing
# Allow SSH
ufw allow ssh
# Or specific port
ufw allow 2222/tcp
# Web traffic
ufw allow 80/tcp
ufw allow 443/tcp
# Enable
ufw enable
Management
# Check status
ufw status verbose
# Remove rule
ufw delete allow 80/tcp
# Disable
ufw disable
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