References:
- https://github.com/darkk/redsocks
- https://www.cnblogs.com/develon/p/11830726.html
- https://fuckcloudnative.io/posts/linux-circumvent/
- https://www.cnblogs.com/whych/p/9147900.html
- https://www.singchia.com/2018/03/23/A-Brief-Talk-About-Proxy-CN/
- https://blog.chih.me/global-proxy-within-redsocks-and-shadowsocks.html
- http://gsoc-blog.ecklm.com/iptables-redirect-vs.-dnat-vs.-tproxy/