Access Your Homelab Remotely without Port Forwarding (Bypass CGNAT with Tailscale)
📖 Original Reference: Originally published with zero-trust network topologies at alexmaina.dev/tailscale-pihole-homelab-cgnat. With modern fiber (FTTH), cellular 5G, or Starlink connections, most ISPs place customer routers behind CGNAT (Carrier-Grade NAT). Under CGNAT, you do not have a public IPv4 address, rendering classic port forwarding completely useless. Even if you have a public IP, opening ports (like port 22 or WireGuard port 51820) exposes your home router to 24/7 automated port scan
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.