@Benibis Hi, Personally I think you might need to tag port 1 one switch 1 that is connected to the router, instead of leaving it untagged.

@CDJones Deco S4 only has basic NAT features when it works as a router, no built-in firewall involved. I think you could set up the Netgear router was the main router, then connect S4 as an access...

@Ana_M21 Hi, you could download the Tether APP to change the SSID of RE200 to be different from the main router. And also don't set up it via the WPS button otherwise it will automatically copy the...

@ParkerinOH The password should be the one you use to log into the web interface of RE200 and maybe you could try admin. And it could be reset via the reset pinhole on RE200, holding it for 10s Best...

@Daizer Which light is flashing blue？Did you set it up via WPS button? maybe you could try to set it up via the Tether APP or web interface. How to configure Range Extender via Tether APP

@ibro67 Have you tried the beta firmware here: https://community.tp-link.com/en/home/forum/topic/273730