CentOS 6.0/7.0关闭默认防火墙启用iptables防火墙

命令一

netstat -a    查看所有服务端口

命令二

nmap +ip地址

yum install nmap  安装nmap软件包

linux开放服务端口的设置

/etc/sysconfig/iptables

vi iptables

加入如下内容

-A INPUT -p tcp -m tcp --dport 6001 -j ACCEPT
然后保存退出，重启服务
/etc/init.d/iptables restarts
查看端口是否开放
/sbin/iptables -L -n

cd /etc/firewalld/
cd zones
vi public.xml

<?xml version="1.0" encoding="utf-8"?>
<zone>
<short>Public</short>
<description>For use in public areas. You do not trust the other computers on networks to not harm your computer. Only selected incoming connections are accepted.</description>
<service name="dhcpv6-client"/>
<service name="ssh"/>
<port protocol="tcp" port="8080"/>
<port protocol="tcp" port="80"/>
</zone>