4 Easy Steps to Protect Client Devices

As we talked in previous tutorials, you can use connection states, i.e. new, established, related and invalid, to teach your router what the LAN and WAN are.

Simultaneously, you can easily use firewall filter actions to accept new, established and possible related connections, while dropping invalid connections, as well as all other traffic that is directed toward your router from the WAN.

With four rules with the input chain, you can secure your main router against outside traffic, and, quite similarly, with four other rules with the forward chain, you will make sure no malicious traffic gets past you toward client devices and the networks beyond.