CentOS6与CentOS7添加防火墙例外端口的命令不用，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：systemctldisable firewalld.service