查看并关闭firewall防火墙
systemctl status firewalld.service #检测是否开启了firewall systemctl stop firewalld.service #关闭firewall sytsemctl disable firewalld.service #禁止firewall开机自启
安装iptables
yum install iptables-services
配置iptables
vim /etc/sysconfig/iptables
*filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT
启动iptables防火墙
systemctl start iptables systemctl status iptables
开机启动iptables防火墙
systemctl enable iptables