Ken is wondering if he should use Watchguard on his Wi-Fi network for added security. Leo says he doesn't need this. These are internet security devices, or firewalls, that he'd run in his house. Routers are not very well designed and are commodity products, so they tend to have security flaws. Getting a better router would be a better way to increase security. Leo suspects Watchguard would be more than he actually needs.
The router itself will provide basic security. It sits between him and the outside world, and will reject any traffic that it doesn't know about. Leo says if he's going to use a Wi-Fi router, he should turn off WPS, the button that automatically configures security. Turn off WAN administration. He should also turn off UPnP. He should make sure to change the routers name that isn't an address or family name, change the administrator password, and turn on WPA2 encryption.