1 3 3 7 4 2 0 6 6 6 1 3 3 7 4 2 0 6 9 6 6 6 1 3 3 7 4 2 0 6 6 6 4 2 0 1 3 3 7 6 9 6 6 6 4 2 0 1 3 3 7 6 9 6 6 6 4 2 0 6 9 1 3 3 7 6 6 6 4 2 0 6 9 1 3 3 7 6 6 6 4 2 0 6 9 6 6 6 1 3 3 7 4 2 0 6 9 6 6 6 1 3 3 7 4 2 0 6 9 1 3 3 7 6 6 6 4 2 0 6 9 1 3 3 7 6 6 6 4 2 0 6 9 1 3 3 7 6 6 6 6 9 4 2 0 1 3 3 7 6 6 6 6 9 4 2 0 1 3 3 7 6 6 6 4 2 0 1 3 3 7 6 6 6 6 9 4 2 0 1 3 3 7 6 6 6 6 9 4 2 0 6 9 1 3 3 7 4 2 0 6 6 6 6 9 1 3 3 7 4 2 0 6 6 6 6 9 1 3 3 7 6 6 6 6 9 4 2 0 1 3 3 7 6 6 6 6 9 4 2 0 1 3 3 7 6 6 6 4 2 0 6 9 1 3 3 7 6 6 6 4 2 0 6 9 1 3 3 7 6 6 6
Logo SCHEISSSEWASSER.XYZ
NETWORK DIAGNOSTIC

PORT_TESTER

PORT FORWARDING VERIFICATION TOOL

Important: This tool checks if common game ports are accessible from the internet. For accurate results, ensure port forwarding is configured on your router before testing.

QUICK PORT TEST

COMMON GAME PORTS

Click to test if these popular game ports are accessible

PORT REFERENCE GUIDE

Minecraft

25565 (TCP/UDP) - Server Port
Required for incoming connections to your Minecraft server

Counter-Strike 2 / CS:GO

27015-27030 (UDP) - Game Traffic
27015 (TCP) - RCON (optional)
27015 is the primary port for game connections

Valve Games (Source Engine)

27015 (UDP) - Game/Query
27005 (UDP) - Client Port
26901 (UDP) - Steam

ARK: Survival Evolved

7777 (UDP) - Game Port
7778 (UDP) - Raw Socket
27015 (UDP) - Query Port

Rust

28015 (UDP) - Game Port
28016 (UDP) - Query Port
28082 (UDP) - RCON

FTP / SFTP

21 (TCP) - FTP
22 (TCP) - SFTP/SSH

Web Servers

80 (TCP) - HTTP
443 (TCP) - HTTPS

TROUBLESHOOTING

Port shows as CLOSED?
  • Check Windows Firewall - add allowed rule for the port
  • Verify router port forwarding - forward to correct local IP
  • Ensure the application/server is running
  • Check if your ISP uses CGNAT (carrier-grade NAT)
What is CGNAT?

Some ISPs share public IPs among multiple customers. If you have CGNAT, port forwarding won't work. Consider getting a static IP or using a VPN service with port forwarding.