Operating commands for Linux firewall commands CentOS

 service FIREWALLD status; #   systemctl start firewalld.service; #   systemctl stop Firewalld.service; #    systemctl restart Firewalld.service; #   systemctl disable Firewalld.service#   disable firewall on self-start  systemctl enable Firewalld#   Set the firewall on boot  yum remove Firewalld#  Span style= "color: #008000;" > Uninstall firewall  

Install iptables Firewall and operation: # Yum Install iptables-services# iptables firewall # vi/etc/sysconfig/iptables# Edit Firewall profile, open 3306 port    Add configuration:-A input-p tcp-m State--state new-m TCP--dport 3306-J ACCEPT## last reboot firewall to make configuration effective ## set up firewall boot

Operating commands for Linux firewall commands CentOS