A fast tunnel proxy that helps you bypass firewalls
You can use Google.
This is shadowsocks server.
If you want to install shadowsocks-server you need install git frist.
also need root password to add firewall poort
git clone git://github.com/csxvzzzi/centos7-shadowsocks.git
cd centos7-shadowsocks
chmod 755 centos7-shadowsocks.sh
./centos7-shadowsocks.sh