[root@localhost ~]# cd /etc/sysconfig #找到iptables文件
[root@localhost sysconfig]# vim iptables
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 8080 -j ACCEPT #加入这一行，启动8080端口访问
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
如果最开始用的是firewall，name没有iptables，这时候先停掉firewall服务，然后安装iptables和iptables-services，在进入/etc/sysconfig查看是否有iptables文件
systemctl stop firewalld，
systemctl mask firewalld
[root@localhost sysconfig]# yum install -y iptables
[root@localhost sysconfig]# yum install iptables-services