查看openvpn 的端及PID:netstat  -anput | grep openvpn

netstat -tlunp

netstat -anut

netstat -aptn

netstat -ntlp(也许这个准吧)

yum install firewalld

firewall-cmd --permanent --zone=public --add-port=8688/tcp

firewall-cmd --zone=public --add-port=1194/tcp --permanent （这个准点）

systemctl status firewalld

firewall-cmd --state

查看已打开端口：firewall-cmd --zone=public --list-ports

 /sbin/iptables -I INPUT -p tcp --dport 8688 -j ACCEPT

所有服务：cd /usr/lib/systemd/system

/bin/systemctl start openvpn@.service

/bin/systemctl start openvpn@47.105.119.104

/bin/systemctl start openvpn@server

/bin/systemctl restart openvpn@server