I'm running Fedora 20 and would like to see what my firewall is doing in the background. Is it possible to view a log of the traffic blocked by FirewallD?
you can see the logging information by using iptables:
first open the command line and run iptables service:
second write this command:
then you can write this command:
it will give you the logging information you are looking for
the code above let you see what your firewall do with the packets which enter to your network, you can also see the packets which get out of your network by replacing INPUT by OUTPUT in the second command above