Open Port Checker

Scan a host or IP to determine which ports are open and accessible on the network.

  1. 1 Enter Host/IP: Input the target server's IP address or hostname.
  2. 2 Specify Port: Enter the port number you want to test (e.g., `80` for HTTP, `443` for HTTPS, `21` for FTP).
  3. 3 Run Scan: Click "Check Port Status".
  4. 4 Check Status: The tool reports if the port is open (service is running and accessible), closed (no service listening), or filtered (blocked by a firewall).

What is a common open port to check?

The most common ports are 443 (HTTPS) for secure web traffic and 80 (HTTP) for standard web traffic.

What does "filtered" status mean?

"Filtered" usually means a firewall is actively blocking the port, preventing any outside connection attempts from reaching the service. This is often a sign of good security.

How does this tool aid security?

It helps you verify that only intended ports (like 443) are open, and that critical ports (like remote desktop or database ports) are correctly closed or filtered by your firewall.

Firewall Testing

Example Keyword: test if port 443 is open
Confirm your server's external firewall is functioning correctly and only allowing expected traffic.

Game Server Setup

Example Keyword: check game server port access
Verify that the required port for a specific game server is accessible to players.

Service Validation

Example Keyword: verify RDP port 3389 status
Check that remote services like SSH (22) or RDP (3389) are open and listening correctly.

Try:

Common Ports by Category

Web Services

Email Services

Remote Access

Databases

Other Services

  1. 1 Enter Host/IP: Input the target server's IP address or hostname.
  2. 2 Specify Port: Enter the port number you want to test (e.g., `80` for HTTP, `443` for HTTPS, `21` for FTP).
  3. 3 Run Scan: Click "Check Port Status".
  4. 4 Check Status: The tool reports if the port is open (service is running and accessible), closed (no service listening), or filtered (blocked by a firewall).

What is a common open port to check?

The most common ports are 443 (HTTPS) for secure web traffic and 80 (HTTP) for standard web traffic.

What does "filtered" status mean?

"Filtered" usually means a firewall is actively blocking the port, preventing any outside connection attempts from reaching the service. This is often a sign of good security.

How does this tool aid security?

It helps you verify that only intended ports (like 443) are open, and that critical ports (like remote desktop or database ports) are correctly closed or filtered by your firewall.

Firewall Testing

Example Keyword: test if port 443 is open
Confirm your server's external firewall is functioning correctly and only allowing expected traffic.

Game Server Setup

Example Keyword: check game server port access
Verify that the required port for a specific game server is accessible to players.

Service Validation

Example Keyword: verify RDP port 3389 status
Check that remote services like SSH (22) or RDP (3389) are open and listening correctly.

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