Is simply enabling the firewall ufw (sudo ufw enable) sufficient enough for protection of the OS ? I mean should extra rules be added for 'better' protection, or is simply enabling the firewall enough for good results and protection from hackers or other stuff ?
With the output of sudo ufw status verbose I get
standard: Deny (icomming) / Allow (outgoing) and status: active
It's a bit confusing when some experts throw in that extra rules should be made, since uwf active without rules give absolute no protection.