Power over Ethernet is awesome, but don’t get it confused with Ethernet over Power (more commonly known as Powerline, so that’s what I’ll be calling it). Powerline is an inexpensive way to get Ethernet in your house. It uses the copper electrical wiring in your home to send an Internet signal. You plug one adapter into your router, and the other somewhere else in your home and press the “PAIR” or “SYNC” button.
You might think there will be significant interference because the wiring in your home is already occupied by electrical current. This is not so, as the AC power already in your outlet is running at a frequency of 50 or 60 Hz, while the internet signal runs at 2 to 86 MHz (2,000,000 to 86,000,000 Hz).
So it is just set and forget? Pretty much, but there might be some security vulnerabilities. If you live in an apartment, anyone can connect to your Powerline by plugging in their own receiver. Another vulnerability is that if you have Powerline connected, you can access it on the outside outlets. This means that anyone can come and plug in their Powerline adapter and get into your home network.
This is a problem because not only do they use your bandwidth, but that gives them access to local files and computers on the network, and more. This can be prevented by securing the Powerline system. For this example, we will be using a TP-Link Powerline system.
I hope this shows you why you should secure your Powerline system! Here is the Powerline we use: http://a.co/d/9Guyji6