Even though my firewall is active, is it protecting me fully given that the 'rules' are not active?
host based firewall active, empty rules
iptables modules loaded, but no rules active
Maybe I should mention that I recently changed the OS from ubuntu to debian.
The firewall was probably made in relation to the ubuntu system and settings, if that makes any sense. It's also possible that someone could have hacked the fw and deleted the rules.