@swiwa Toggle on Traffic Monitor, and then you view the traffic usage of a device in the past 10 minutes or that of all devices in the past 10 minutes/24 hours/7 days. While no daily usage available...

@evertech Thanks for your reply. May I know when and where did you buy this Archer MR400? Good day.

@joso Can linux computer and Android phone access internet? Other devices work well indicates that the router should be fine. Have you ever tried to change another web browser to open facebook?...

@I3enners What is the current network diagram? How do you connect these devices together? What kind of VPN the computer has connected? Please ensure that relative VPN passthrough has been enabled on...

@1ah1ksa Thanks for your reply, glad to hear that it works well for now. You can take more time to verify its performance, any updates, please let us know.

@ELshwarby Please login to the web interface of the TP-Link router. And then go to wireless/wifi page to change the wifi password. Good day.