I have many nerdy friends who have been Linux users for ages. But most of them don’t know such a thing as Openwrt exists or have never bothered to give it a try. It’s a very fun piece of software to play with and can be extremely useful for routing traffic. Wondering why it isn’t more popular/widely used.
thats something you would have to discuss with your cable company, and they would probably tell you to removed right off.
i wouldnt recommend you to mess with that anyway if you dont want to have a variety of problems.