open firewall port centos 7 code example

Example 1: firewall port open centos

firewall-cmd --zone=public --add-port=2888/tcp --permanent
Then remember to reload the firewall for changes to take effect.

firewall-cmd --reload

Example 2: centos 7 port open

firewall-cmd --zone=public --add-port=55555/tcp --permanent
firewall-cmd --reload

Example 3: is firewall running centos 7

systemctl status firewalld