Firewalld

Redhat firewall interface

Links

• https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-using-firewalld-on-centos-7

FAQ

add service

firewall-cmd --zone=public --add-service=https
firewall-cmd --permanent --zone=public --add-service=https

add port

firewall-cmd --zone=public --add-port=5000/tcp
firewall-cmd --permanent --zone=public --add-port=5000/tcp

or

firewall-cmd --permanent --zone=public --add-rich-rule='
 rule family="ipv4"
 source address="1.2.3.4/32"
 port protocol="tcp" port="4567" accept'