@TP-Link Thanks for all of your help. My ISP implemented a CGNAT and I have now opted out. Everything works so far.

You're absolutely right. It appears I am on a CGNAT so I will contact my ISP to see whether I can opt-out or have certain ports opened. Thanks for your help. I will post as soon as I have an answer.

@TP-Link Thanks again. I have emailed some screenshots of my configuration with the Deco app. In terms of connecting to my NAS remotely, this is mostly done via browser and the only error is a...

@TP-Link Thanks for the reply. DDNS resolves just fine to my IP address but they both fail to connect to the NAS from outside of the network. Internally the NAS connects fine and is running as it...

Additional M9 Plus units: FW ver. 1.5.2 Build 20210223 Rel. 35265 I am trying to setup port forwarding to my Synology NAS (Connected directly to one of the M9 Plus units) from my X20-DSL but can't...