How Can I Indirectly Detect Who Is Connected to My WiFi?
There are several clues that can help you indirectly detect that someone is using your WiFi. If you’re lucky, you might even be able to tell who that person is without using any special tools to directly analyze your wireless network.
If your download and upload speeds are consistently below what they should be, the chances are that someone is on your WiFi, using it to download stuff from the Internet. But don’t be too quick to jump a conclusion because a single slowdown can be caused by a number of different things, such as a background update process or even a regular maintenance task executed on your router.
A sudden connection drop could mean that someone is trying to join your wireless network, most likely using rather brutish means to guess the password, overwhelming your router and causing it to be unresponsive.
Unknown Connected Devices
When you log in to the admin interface of your router and see unknown devices on the list of attached devices, it could mean that someone who definitely shouldn’t have access to your wireless network is using it to access the Internet. But depending on how your router stores login information, the attached devices could also just be smartphones and wearables belonging to the people who have visited your house before.
Do your Internet speeds slow down every time your neighbor returns home from work? Then he or she might be using your WiFi. To verify that your suspicion is true, change your WiFi password and do a speed test to see whether your Internet speeds have improved. If they suddenly get worse after a few hours or days, your neighbor might be pretty good when it comes to WiFi hacking.