CentOS6与CentOS7添加防火墙例外端口的命令不同，需单独来说：

1、CentOS6下添加防火墙例外端口

vim  /ets/sysconfig/iptables

在 -A INPUT -m state--state NEW -m tcp -p tcp --dport 22 -j ACCEPT

一行的后台添加类似的一行命令即可，如:

# 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 -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 1216 -j ACCEPT

-A INPUT -j REJECT --reject-with icmp-host-prohibited

-A FORWARD -j REJECT --reject-with icmp-host-prohibited

COMMIT

然后重启防火墙服务：

service iptables restart/start/stop

2、CentOS7下添加防火墙例外端口

firewall-cmd --zone=public --add-port=8180/tcp --permanent        #添加8180端口

firewall-cmd --reload                      #重新加载策略配置，以使新配置生效

注：禁止firewall开机启动为：

systemctl disable firewalld.service