Firewall Rules Generator

Rule Order Matters

Firewall rules are processed top-to-bottom. Place more specific rules before general ones. For example, rate-limit SSH before allowing it generally.

Rate Limiting for Security

UFW: ufw limit ssh allows 6 connections per 30 seconds per IP.

iptables: Use --limit 10/minute --limit-burst 20 for similar protection.

Common Port Numbers

• 22: SSH (Secure Shell)
• 80: HTTP (Web Traffic)
• 443: HTTPS (Secure Web)
• 53: DNS (Domain Name System)
• 3306: MySQL Database
• 5432: PostgreSQL Database
• 27017: MongoDB
• 6379: Redis