Open Port Checker
Test if ports are open on a specific IP address or domain.
About Port Checking
A port checker is a useful tool to verify external IP address port forwarding and checks if the port is open or closed. It is useful for testing if your router or firewall is correctly configured.
Open Ports
Indicates that the application or service is listening and reachable on that port.
Closed Ports
Indicates that no application is listening on that port or a firewall is blocking access.
Gaming
Often used to check if game servers (Minecraft: 25565, Steam: 27015) are reachable.