Visit the hotel

There are two ways. One is to reduce your dhcp ip address pool to a small section so that it is not easy for him to guess. You must use a static ip address to use the router. He set a static ip address for the wan port of his router, and constantly modified the scope of dhcp pool, so that he could not surf the Internet normally when other users were normal. Method 2: Check the network connection on your router, and roughly judge his ip and his mac address according to the traffic, then enable the firewall or internet access restriction on your router and add him to the control list.