Self Hosting for Privacy - Importance of Owning your own Modem/Router?

https://lemmy.blahaj.zone/post/39987706

Blåhaj Lemmy - Choose Your Interface

I would get a router that supports an open source firmware or operating system like OpenWRT. Which one depends entirely on your use case. Getting a router from your ISP is fine if you’re allowed to and capable of flashing it, and if you trust them (I’m lucky that I have an ISP with a track recoding of fighting for their users’ privacy and integrity).
In addition to not trusting the privacy of stock firmware, OpenWRT provides a lot of useful features for self-hosting like local DNS for your services and a feature-rich firewall to, for example, block devices you don’t trust from phoning home.