Cannot open Port 21

Cannot open Port 21

Cannot open Port 21
Cannot open Port 21
2024-05-30 02:49:49
Model: Archer AX73  
Hardware Version: V1
Firmware Version: 1.3.6

I tried adding an FTP service for my local server for external client to use for FTP. Input the external and internal port using port 21 and TCP protocol. Enabled it but when I checked on port checker, it is closed. However, I added HTTP service and input the external and internal port using port 80 using the same TCP protocol, checked the port on port checker and it is open. My ISP does not block port 21. What instruction did I miss? How do I enable and open port 21?

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Re:Cannot open Port 21
2024-05-30 13:22:54

  @ZEPPERION 

 

You can check an example for configuring a passive FTP service (Windows) - here.

You can also check an example for configuring passive FTP service on Synology NAS - here.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
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Re:Cannot open Port 21
2024-05-31 03:39:18

  @terziyski When I added the passive FTP, it showed either individual or ranged port, whenever I tried both of these options, eventually, both of them included in the internal port even when I left the internal port blank. Also checked whether the port is opened or not, still closed.

 

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#3
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Re:Cannot open Port 21
2024-05-31 17:35:49

  @ZEPPERION 

 

Make sure your FTP server is configured properly. If there's no active service on port 21 router may report it as closed from an external network.

Use the stories I posted to see how to configgre a passive FTP service on Symology NAS or MS Windows.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
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