I am a happy owner of Raspberry Pi 3 and I have configured it as my tiny home server + router. It works well, but then I decided to install some content filtering to block myself from easily browsing through time-consuming newsfeeds and stuff during my day. I have found few answers, suggesting E2Guardian, GateSentry and SquidGuard. Unfortunately though, all of them require client-side proxy configuration, or at least this is what I understood from the walk-through guides.
My question is, can you recommend me any solution that would not require any client-side proxy setup, and instead simply block the requsts to declared sites?