1. 打开配置文件
[root@localhost ~]# vi /etc/sysconfig/iptables
2. 正确的配置文件
# Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *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 -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT -A INPUT -j REJECT –reject-with icmp-host-prohibited -A FORWARD -j REJECT –reject-with icmp-host-prohibited COMMIT
-A INPUT -m state –state NEW -m tcp -p tcp –dport * -j AC
3. 新开启的端口 一定要在22端口的后面写
重启防火墙 使配置生效
[root@localhost ~]# /etc/init.d/iptables restart 查看开放的端口
[root@localhost ~]# /etc/init.d/iptables status
关闭防火墙
[root@localhost ~]# /etc/init.d/iptables stop
