CentOS7-勾选http https防火墙（防火墙规则已建） VPC网络-外部IP地址（释放原来的）
https://teddysun.com/489.html
https://shadowsocks.be/9.html
https://github.com/shadowsocksr-backup/shadowsocksr-csharp/releases pac: https://doub.io/ss-jc59/ or derect download: https://raw.githubusercontent.com/ToyoDAdoubi/doubi/master/other/pac.txt