Centos7 (Firewall) firewall opens common port commands

Centos7 has firewalld installed by default. If it is not installed, you need to install it with the YUM command; firewalld is really hard to use, and it is very different from the previous iptable firewall, but after all, it is the future mainstream that pays attention to slowly running into its setting rules;

Install Firewall command:

yum install firewalld firewalld-config

Firewall opens common port commands:

firewall-cmd --zone=public --add-port=80/tcp --permanent firewall-cmd --zone=public --add-port=443/tcp --permanent firewall-cmd --zone=public --add-port=22/tcp --permanent firewall-cmd --zone=public --add-port=21/tcp --permanent firewall-cmd --zone=public --add-port=53/udp --permanent

Firewall closes common port commands:

firewall-cmd --zone=public --remove-port=80/tcp --permanent firewall-cmd --zone=public --remove-port=443/tcp --permanent firewall-cmd --zone=public --remove-port=22/tcp --permanent firewall-cmd --zone=public --remove-port=21/tcp --permanent firewall-cmd --zone=public --remove-port=53/udp --permanent

Add interval ports in batches

firewall-cmd --zone=public --add-port=4400-4600/udp --permanent firewall-cmd --zone=public --add-port=4400-4600/tcp --permanent

Open firewall command:

systemctl start firewalld.service

Restart firewall command:

firewall-cmd --reload or service firewalld restart

View port list:

firewall-cmd --permanent --list-port

Disable firewall

systemctl stop firewalld

Set startup

systemctl enable firewalld

Stop and disable startup

sytemctl disable firewalld

View status

systemctl status firewalld or firewall-cmd --state

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