Switch on the WEP or even better the WPA data encyption.
Enable MAC adressing - which will only let the computers whose MAC address you input connect.
Switch off the SSID feature.
All of this comes as standard on your wireless setup.
OnePlus 5 review
See the work of famous artists playing with toys
iPad Pro 10.5in (2017) review
Comment faire une capture d’écran sur un Mac ?