My router was reset by someone else

[#1]

@Champnet The name looks like the actual device name, "DESKTOP-TA407A3" the number looks like the motherboard. They are probably a neighbour trying to get free WiFi. It's 5GHz, and I can't account for it. I know all the others on the list. Tell me how else I can convince you.

[#2]

@jab1 That's the first thing I did once I realised none of my devices could connect.

[#3]

On the Hub two My network list a device name with "unknown_<mac address of the device>" is likely be a network card with a randomised MAC address such as a smart phone and tablets or a device where the Hub Two does not recognise the manufacture of the network device be it wired or wireless.

[#4]

@JMak  Input the MAC address in https://www.macvendorlookup.com/ it may help to identify  the device by it’s manufacturer.

[#5]

@JMak I believe that some-one else has got access to your network, my scepticism concerns the assumption that it has been hacked.

Apart from someone getting a look at the settings from the hub pull out tab, I have another theory.

Do you use any powerline devices to transfer Ethernet data over the mains wiring? If so, it is not unknown for these to be used with their default passwords, which are not unique. There have been reports in the past of people finding that they are connected to their neighbours network by accident due to both using powerline.

[#6]

That might explain how an unknown device shows up in the LAN attached DHCP lease table, but would not explain how they hacked the router admin page to change the password.

[#7]

@JMak 

It is possible to pause a devices access to the internet.

Go to Advanced settings >Access control >Pause

In the devices list select the device that is unknown to you, select the time period you wish to pause it. It can be paused for 1 or 2  hours or a custom period.

The device will see this message when using a browser