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UFW

Created: 2025-11-30
Updated: 2025-11-30

UFW (Uncomplicated Firewall) setup and configuration guide for managing iptables rules and securing server access

Architecture

Text
  Internet
      │
      ▼
  ┌─────────────────────────────────────────────┐
  │         UFW (Uncomplicated Firewall)        │
  │              iptables frontend              │
  └──────────┬──────────────────────────────────┘
             │
             ├──► 1. Check default policy (DROP/ACCEPT)
             ├──► 2. Check user rules (/etc/ufw/user.rules)
             ├──► 3. Check before rules
             ├──► 4. Check after rules
             ├──► 5. Rate limiting (if configured)
             ├──► 6. Log blocked packets
             │

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