安裝 iptables
CentOS 7
yum install iptables
yum install iptables-services
啟動 iptables
關閉 firewall
systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall開機啟動
systemctl restart iptables # 啟動iptables
systemctl enable iptables # 開機啟動iptables
編輯規(guī)則
修改文件 /etc/sysconfig/iptables
開放端口號 4000
-A INPUT -p tcp -m tcp --dport 4000 -j ACCEPT
