Raspberry Pi 4, Model B, not showing up

[Jacob]

Here, try this. Its a temp fix though.

Plinth, SSH, Transmission, Samba, and Syncthing reachability problem after apt upgrade

After sudo apt remove freedombox ; sudo apt autoremove the problem went away. So the problem seems to be caused by freedombox. After reinstalling freedombox the problem came back. sudo systemctl stop firewalld solved the problem. So it should be some update to the firewall rules that caused the problem. The problem appeared after an update of freedombox. I guess my remote server is lost forever (or till covid travel restrictions are down) since I can’t disable the firewall there.

sudo systemctl stop firewalld

This guy figured it out. After a reboot though Firewalld service restarts.

I also use fing as my network IP scanner. If it doesn’t show up there, this solution won’t work.