@Intracomp These are two different things. Here's how to use TP-Link DDNS cloud service. Here's hot to use TP-Link cloud account (TP-Link ID) to remotely manage your router.

@Milehiguy There's no mechanism for isolating a directly connected device through the router ethernet port from its LAN. You could use a travel router like TL-WR902AC in client mode and connect it to...

@Pawel2024 Yes, that's a known limitation. Same applies for the guest network.

@DIYUser11 Your best bet would be to configure speed limit for the problematic client device - details.

@Thody Well done. That was probably a hit or miss operation - and it was a hit ? Modded FW release can be shared via Google Drive or MediaFire link. I believe that you can also attach it to your post...

@Debi568 Update the RE firmware first and then follow my post suggestions - here. How to update RE firmware - details.