wtf is gfw?

This repository, known as "gfw," is a personal collection of notes and setup scripts for people who want to build and optimize their own virtual private network (VPN) on a rented cloud server. The primary benefit is getting faster, more stable internet connections when accessing servers located far away or across regions with heavy network restrictions. At a high level, the project walks through installing a proxy tool called Shadowsocks, which encrypts and routes your traffic through a remote server so it can bypass local network filters. Beyond the basic setup, the notes focus heavily on speed optimization. They include instructions for installing several network acceleration tools, such as "ServerSpeeder," "net-speeder," and "FinalSpeed", that tweak how data packets are sent and received. For example, net-speeder deliberately sends duplicate packets to trigger faster retransmission on unreliable connections, trading some efficiency for better download speeds. The audience for this project is someone with basic server administration knowledge who has rented a virtual server (VPS) and wants to maximize their connection throughput, particularly on high-latency or unstable links. A concrete use case would be a user in China renting a server overseas, they would use these scripts to set up Shadowsocks and then apply acceleration tools to compensate for the long, unstable network path between them and the server. A notable aspect of the project is how it categorizes these acceleration techniques into "single-sided" versus "double-sided" approaches. Single-sided tools only need to run on the server, while double-sided ones require software on both the server and the user's device. The README itself is written in Chinese and reads more like a personal technical diary than a polished guide, meaning it assumes some existing familiarity with Linux commands and server environments.