sudo su # enable zabbix on system boot systemctl enable zabbix-server.service # stop the server systemctl stop zabbix-server # check status systemctl status zabbix-server.service # start it systemctl stop zabbix-server # check status systemctl status zabbix-server.service # disable SELinux sestatus sudo setenforce 0 sudo shutdown -r now sudo su sestatus # iptables yum install iptables-services systemctl enable iptables systemctl start iptables # delete all rules iptables -F # accept everything iptables -P INPUT ACCEPT iptables -P OUTPUT ACCEPT iptables -P FORWARD ACCEPT iptables-save