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Enter a command. For example: bpftrace, wmctrl, wodim, nitrogen.

firewall-cmd

The firewalld command-line client. More information: https://firewalld.org/documentation/man-pages/firewall-cmd.

• View the available firewall zones:
   
  firewall-cmd --get-active-zones
   
• View the rules which are currently applied:
   
  firewall-cmd --list-all
   
• Permanently move the interface into the block zone, effectively blocking all communication:
   
  firewall-cmd --permanent --zone={{block}} --change-interface={{enp1s0}}
   
• Permanently open the port for a service in the specified zone (like port 443 when in the public zone):
   
  firewall-cmd --permanent --zone={{public}} --add-service={{https}}
   
• Permanently close the port for a service in the specified zone (like port 80 when in the public zone):
   
  firewall-cmd --permanent --zone={{public}} --remove-service={{http}}
   
• Permanently open two arbitrary ports in the specified zone:
   
  firewall-cmd --permanent --zone={{public}} --add-port={{25565/tcp}} --add-port={{19132/udp}}
   
• Reload firewalld to force rule changes to take effect:
   
  firewall-cmd --reload