@Ronald1971 

Okay, I understand that you have set up port forwarding for ports 22, 80, 443, and 3389 on your Deco Mesh system, but only port 443 is not working while the others are open.

Here are some important points to consider regarding port forwarding on Deco:

1. Port Forwarding Setup:
Port Forwarding allows you to make specific devices or services on your home network accessible from the internet by forwarding external requests to designated internal devices or ports. This is commonly used for gaming, remote desktop, web servers, and other applications that require remote access.

2. How to Set Up Port Forwarding:
In Router mode, you can configure Port Forwarding in the Deco app by navigating to MORE > Advanced > NAT Forwarding > Port Forwarding. For detailed instructions, please refer to this FAQ: https://www.tp-link.com/support/faq/1797/

3. Important Notes:
• Port Forwarding is not available in Access Point mode, as the Deco system does not function as a router in this mode.
• When you create a port forwarding rule, the Deco app will automatically reserve an IP address for the selected device. This ensures the device always receives the same IP address via DHCP, as port forwarding may fail if the device's IP address changes.

Troubleshooting Tips for Port 443:
• Make sure the device you are forwarding port 443 to is running a service that listens on that port (such as a web server with HTTPS enabled).
• Check if another device or service on your network is already using port 443, which could cause conflicts.
• Some ISPs block inbound traffic on port 443 for residential connections. You may want to check with your ISP.
• Ensure there are no firewall settings on the target device that are blocking port 443.

If you have followed all the above steps and port 443 is still not open, please provide more details about the device and service you are trying to access, so we can assist you further.

  @Ronald1971 

Hi, thank you very much for the feedback.

Deco web admin page https login also uses port 443.

Have you tried to change the external port of the network server that you wish to open ports 443, such as:

Internal port is 443 while the external port is 441 or 442.

Wait for your reply.

Best regards.

  @Ronald1971 

Hi, thanks for the update.

Please make sure "UPNP" has been disabled already.

Which local server it is that you need to open port 443 for?

Is Deco M4 the only router you had in the network?

If yes, is the IPV4 address on the Deco APP, the same as the IP address displaying here:https://whatismyipaddress.com/

Instead of using online port checking, if you test via xxx.xxx.xxx.xxx(the public IPV4 address):441/442, can you access the local server？

Wait for your reply.

Best regards.