As OSMC connects to the interne (though not set up for remote/external WAN access), is it worth installing a firewall (ufw)? And would I need to open any ports? (I only have youtube and iWWWplayer apps installed).
Generally, there seems differing opinion. Some say if a device is behind a nat router with built in firewall, that’s enough. Others say, having another layer of protection is necessary or a least increases security.