Leaving your home Wi-Fi network unsecured is like leaving your front door unlocked while you're on vacation. Sure, you could go weeks without a problem, but you'd never know if a stranger was sleeping on your couch, ransacking your refrigerator, or stealing your big-screen TV. You wouldn't leave your home unprotected, so why not protect your personal data from falling into the wrong hands? It only takes a few steps to secure your Wi-Fi network.
Some router manufacturers have standard administrator passwords and default SSID (or network) names, while others have that info printed on each device itself. The exact combination varies from model to model, but it's easy enough for a hacker to gain access with just a quick Web search. When you first set up the network, give your SSID a new name that you’ll easily recognize and choose a strong password. It's the best and number one line of defense against hackers.
By default, your router will broadcast the name of your home network (or SSID) to the surrounding area so Wi-Fi devices can identify it and connect. But contrary to popular belief, disabling your SSID's broadcast won't keep bad guys with the right software from finding your Wi-Fi network. You're really only hiding or "cloaking" it, and if no other security is configured, you're open to attacks when it's found. In fact, disabling SSID broadcasting can actually cause connectivity issues, as some systems only work when the access point has SSID broadcasting enabled.
Your router's firewall is like a traffic cop that polices your network and prevents Web traffic from going into areas it shouldn't. Configure your firewall so file sharing and printer sharing are disabled. Then enable "stealth mode" to block ICMP traffic—also known as ping requests. This way, hackers can't access your private data or scan your network for configuration weaknesses. The best way to determine if your router's firewall is working is to try to penetrate it, so test it with GRC's Shields UP! or other security-probing software.
Router manufacturers keep their devices as secure as possible by releasing security updates that combat new threats and vulnerabilities. Be sure to periodically visit the manufacturer's website to check for updates if your router's associated software isn't configured to do it automatically. This keeps you on top of functionality improvements and fixes security issues that may have arisen since the device's firmware was installed.