How to check port status using netstat

Use the netstat command to view the status of the port. Note: On Windows systems, you may need to run Command Prompt with administrator rights to view all connection information. On Linux or Mac systems, you may need to use the sudo command or a user with sufficient privileges to execute the netstat command.

#Use the netstat command to view the status of the port and related network connection information. The following is an example of using the netstat command to view port status:

1. Open a command prompt or terminal window.

2. Enter the following command:

   netstat -ano

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   • -a: Display all network connections and listening ports.
   • -n: Display the IP address and port number in numerical form.
   • -o: Display the process ID associated with each connection.

3. After pressing the Enter key to execute the command, all network connection and listening port information on the current system will be displayed, including local IP address, local port, and remote IP Address, remote port and connection status, etc.

   Sample output:

   Active Connections
   
   Proto  Local Address          Foreign Address        State           PID
   TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       1234
   TCP    192.168.0.100:54321    192.168.0.200:12345    ESTABLISHED     5678
   TCP    192.168.0.100:12345    192.168.0.200:54321    ESTABLISHED     5678

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   In the output, you can view the local address, remote address and connection status of each network connection.

Note: On Windows systems, you may need to run the command prompt with administrator privileges to view all connection information. On Linux or Mac systems, you may need to use the sudo command or a user with sufficient privileges to execute the netstat command.

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