What are some best practices to deal with in on a PC? I mean, by default pretty much everything is closed and it's not like there is any "legitimate traffic" at all, but over time it still accumulates some open ports by running stuff in docker and elsewhere: a jupyter console here, an MPD UI there — most of the time I don't even think about the fact that I'm constantly scanned by someone, and remember only after I see some logs and get disturbed by the number of rude guests.