Mesh Wi-Fi Double-NAT Fix

A home office couldn't get the computers and printers on its TP-Link Deco mesh to talk to devices on its Netgear Nighthawk router.

Root cause: the mesh was running in Wi-Fi Router mode, handing out its own addresses and creating a second network behind the Nighthawk (double NAT), which isolated its devices.

What I did: switched the Deco mesh to Access Point mode, so every device sits on one network and one subnet managed by the Nighthawk, with the ISP router kept in bridge mode.

Result: all computers and printers can reach each other, whichever Wi-Fi they join. Delivered with a before-and-after network diagram and a summary of every change.