@JoAxel 

Thanks for reaching out. I understand that you are having trouble getting port forwarding to work on your Deco Mesh system, even though your server is accessible on the local network, you have a public WAN IP, and you've reserved the server's IP address via DHCP.

Here are some steps you can follow to troubleshoot this issue:

1. Confirm Local Network Accessibility: Make sure your server can be accessed from other devices on your internal network using its local IP address.

2. Use the Correct Public WAN IP: When trying to access your server from outside your network, use the public WAN IP address assigned to your Deco. If your WAN IP is not public (for example, it's a private or CGNAT address), port forwarding will not work.

3. Check Server Firewall Settings: Ensure that your server's firewall is configured to allow incoming traffic from the Internet on the port(s) you are forwarding.

If you've tried these steps and still can't access your server from outside, please contact TP-Link support and provide the results of the troubleshooting above so we can assist you further.

  @JoAxel 

Ok let me get a member of the staff to help you out 

@David-TP