I don’t know how I missed it but by default OpenWrt router will be accessed via http. Http means that when you login, data will be transmitted via plain text and in many cases it can received by other devices in your network (depending on how you access router, type of router and what is you network configuration).

Many people can say that they have only trusted devices in your network. But devices have vulnerabilities. You never know if your device is vulnerable. Sometimes you may add friend of guest to your network. You have no idea if they update their devices or if they care about security at all. And in any case defense should be layers, so failure

My house is relatively new but unfortunately in Unites States most houses have video coaxial cable and not ethernet. I seen few houses with ethernet but they still quite rare. On other side apartment where I lived before I bough house has ethernet sockets in every room. It also has USB sockets on pretty much every power outlet. Really convenient. Anyway, after I bought my house, I have to solve connectivity problem.

I had 2 ethernet sockets: 1 on the kitchen and it was built with house and second one was installed to transfer video and audio data to TV during selling process. And every room has coaxial video cable connector.

Initially I though about removing coaxial cable and please

Let me explain my network configuration. First is cable modem Arris SB6183 that works as dumb device that pretty much just transfer signal from cable to ethernet. Next is my main router based on TP-Link Archer C7. It has OpenWrt instead of stock firmware and it works great. Effectively cable modem plugged into WAN port of that router and my router does all heavy lifting. Main router is also Wi-Fi access point. But because I have relatively big house and connection cabinet is in one of its corners, I cannot provide stable Wi-Fi connectivity to opposite corner. As result I have second router based on TP-Link TL-WDR4310. It also running OpenWrt. Second routers to connected to main router by