What is discord-cdn-fix?

This repository distributes a Windows tool called Bypass Ultimate (version 2.1) that is designed to help users in Russia access Discord, YouTube, and Telegram when those services are slowed down or blocked by deep-packet inspection on Russian internet providers. The README is written in Russian. The fix works by combining two open-source network tools called GoodbyeDPI and Zapret, which interfere with the DPI packets that providers use to throttle or block traffic. According to the README, the current version restores YouTube video playback including 4K quality, Discord voice channels and media, and Telegram connections. Installation is described as four steps: download the release archive from the Releases page, unzip it to a folder with no spaces in the path, run the relevant executable as Administrator, and if sites still do not load, run ipconfig /flushdns in a Windows command prompt. The tool does not work alongside VPN software, so any VPN must be turned off first. It is only for Windows desktops, the README points Android and iOS users to separate projects called ByeByeDPI Android and PowerTunnel. The README notes that antivirus programs may flag the software because it works at the network protocol level and lacks a paid code-signing certificate. The author describes this as a false positive and says the code can be inspected manually. A disclaimer states that the author takes no responsibility for how the software is used.