I forwarded port 25565 for a game server but nobody can connect. Is double NAT or CGNAT blocking me?
Solution Port forwarding does not work on my home router. How can I check for double NAT or CGNAT
- Thread starter Syns
- Start date
- 216
Solution
Verify your public IP, detect NAT layers, and ask ISP for a public IP or use a tunnel.
- Compare WAN IP in router with IP shown on whatismyip. If different, you likely have double NAT or CGNAT.
- Place ISP modem in bridge mode or enable DMZ to your own router.
- If CGNAT, request a static public IP or use WireGuard or Cloudflare Tunnel or Tailscale.
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