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How to Test Port Forwarding on Linux

How to Test Port Forwarding on Linux
May 5, 2023
June 8, 2023
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Run the test below on your Linux device to verify that Port Forwarding has been enabled and the appropriate port is being forwarded.

  • Ensure that your VPN is successfully connected, preferably using a PPTP or L2TP VPN connection, on the Linux device where you want to enable Port Forwarding.
  • Install the ncat packages by running the following command in the Terminal: sudo apt-get install ncat.
  • You will type the command ncat -l <remote port> in the Terminal after connecting to the VPN, setting up the necessary packages, and choosing the desired port.
  • Then hit Enter. If there is no output after pressing enter, the test is complete:Desktop setting Banner
  • Complete the previous step, then go on to the next.
  • On a different device not linked to your network (like, your phone using mobile data), open a browser.
  • If the second device is not linked to a different network than the first, the test won’t work.
  • Open a browser on the second device.
  • Enter the URL: http://<VPN IP>:<Forwarded Port> 
  • Enter to go on to the next steps.
  • If you get the following output in the Terminal on the VPN-enabled device, Port Forwarding is active:
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