You can modify your security settings to monitor on your Wi-Fi connection. For Windows users, visit router’s IP address, find the address by moving to a command prompt (press Win+R then type cmd), and then type ipconfig in the window after that search the “Default Gateway” IP address. Mac users can start the Network Preference pane, and select the IP address besides “Router.”
After that, write the IP address in a browser window, then you will be advised to log in. You have to modify the setting which includes ‘admin’, ‘password’ and some empty spaces. The users should follow this step after purchasing a new router. If you have not done it, do it now to avoid the hackers. Verify the IP addresses, MAC addresses, and device names (if found) in the ‘Attached devices section’. This is how you can detect the unwanted networks.