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Can You See Me is a free online tool that allows users to remotely verify if a specific port is open or closed on their connection. This service is particularly useful for individuals who need to check if port forwarding is correctly set up on their router or if their firewall or ISP is blocking certain ports.

What is Port Forwarding?

Port forwarding, also known as port mapping, enables remote computers to connect to a specific computer or service within a private network. This is essential for running servers (web, game, etc.) from behind a router. The tool verifies if the port forwarding setup is successful.

Common Use Cases

• Verify if a web server or game server is accessible from outside the network.
• Check if the ISP is blocking specific ports like port 80 (HTTP) or port 25 (SMTP).
• Test if a firewall is blocking certain ports.

How It Works

1. Users visit the Can You See Me website.
2. They enter the port number they wish to check.
3. The tool then attempts to connect to the specified port on the user's IP address.
4. It reports whether the port is open or closed and provides a reason for the result.

Benefits

The service is straightforward and free, providing immediate feedback on port status.