It is really important to make sure that your wifi network at home remains secured. There are few simple and easy to do steps which you can do to make your wifi safe and secure.
Open Router's Settings Page
Go to your web browser and type in "192.168.1.1" so as to access it. From there, enter your proper username and password in the designated boxes and press enter. You can find your username and password in your router's user manual. Some routers also have their manual available on Google.
Create a Unique Password
Create a new, unique and personalized password for your router which no one can guess. Do not keep a generic or a default password for your wifi router. Also, dont forget to change your password every few months.
Change Network SSID Name
Changing your NETWORK SSID name would help as it'll help others know that it is not a default network, and that it might be secure. Don't keep your family names, phone numbers or home addresses as your SSID names.
Network Encryption
This is an important task. There are a multitude of encryptions out there. In the newest routers, WPA2 is the most secure one, and WEP the least secure. Choose your encryption accordingly.
Filtering PC Mac Addresses
A Mac addresses is an inbuilt address in your device's networking equipment. It is similar to an IP addresses, except that it can't be changed. For more protection, you can add Mac addresses of all your devices to your wifi network. To do that, find your devices' Mac addresses. In PC, use command prompt and type "ipconfig /all". You will see your Mac address against the name 'Physical Address'. In your phone, you'll find your Mac address under networking settings. Simply add these Mac addresses to your wifi router's administrative settings. Now only these devices will be able to access your wifi.
Reducing your Wifi's Range
The easiest way to do that is to put the router under the bed in a shoe box, or to wrap foil around its antennas. Similarly, you can also change your wifi router's mode to 802.11g instead of any other mode.
Upgrading Your Wifi's Software
This is also important as with new updates, you also get new security updates for your router. Check your current firmware version by visiting "192.168.1.1" and checking it in the administration setting or dashboard.