1、檢視linux核心版本，這裡只針對centos7版本

[[email protected] local]# cat /etc/redhat-release 
CentOS Linux release 7.3.1611 (Core) 

2、防火牆firewall 啟動相關

yum install firewalld                # 安裝firewalld 防火牆

systemctl start firewalld.service    # 開啟防火牆
systemctl stop firewalld.service     # 停止防火牆
systemctl enable firewalld.service   # 開機自動啟動
systemctl status firewalld           # 檢視防火牆設定狀態

 

3、防火牆cmd命令

firewall-cmd --reload                # 重新載入配置
firewall-cmd --state                 # 顯示防火牆的執行狀態，開啟了則是running  否則是not runnning

4、開放埠

firewall-cmd --permanent --zone=public --add-port=8080-8081/tcp  # 開放埠永久
firewall-cmd  --zone=public --add-port=8080-8081/tcp             # 開放埠臨時

5、檢視已經開放的埠號 這裡開放了80埠和8080埠

firewall-cmd --list-port           
80/tcp 8080/tcp

6、檢視防火牆中的配置，/etc/firewalld/zones/public.xml  檔案中包含了防火牆的相關配置，

<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="80"/>   # 剛才開發的埠號
  <port protocol="tcp" port="8080"/>
</zone>