My Cloud OS5 - Only connection type relay possible

My Cloud OS 3 Remote Access used the following ports and allowed the user to manually configure port forward on the device itself.

Internal HTTP	80
Internal HTTPS	443

External HTTP	9000 - 9999
External HTTPS	9000 - 9999

My Cloud OS 5 only uses HTTPS and does not allow the user to manually configure port forward on the device itself.
OS 5 depends on UPnP to manage the forwarding of the ports.

Internal HTTPS	4430
External HTTPS  40000 - 49999

fritzbox-7490 Setting up automatic port sharing
https://en.avm.de/service/fritzbox/fritzbox-7490/knowledge-base/publication/show/894_Setting-up-automatic-port-sharing

Based on the information listed above I would suggest:

  • Toggle off and on Automatic Port Sharing / UPnP
  • Check the firewall is not blocking all ports between 40000 - 49999
  • Reboot the router
  • Reboot the My Cloud
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