Is the firewall running
firewall-cmd --state
Show default zone
firewall-cmd --get-default-zone
list current settings
firewall-cmd --list-all
open port in firewall
firewall-cmd --zone=public --add-port=5000/tcp
open application in firewall(http)
firewall-cmd --zone=public --add-service=http
close port in firewall
firewall-cmd --zone=public --remove-port=5000/tcp
close application in firewall(http)
firewall-cmd --zone=public --remove-service=http
making permanent

Add the option 

--permanent

to the add/remove commands above.

list active zones
firewall-cmd --get-active-zones
list all zones
firewall-cmd --list-all-zones