valdikss/goodbyedpi

GoodbyeDPI is a tool that helps Windows computers reach websites their Internet Service Provider is trying to block. The blocking technique it works around is called Deep Packet Inspection, or DPI: instead of just looking at which address you connect to, the provider's equipment peeks inside the actual data packets your browser sends, recognises the name of a forbidden site, and either silently fakes a faster reply or cuts the connection. GoodbyeDPI deals with both flavours, the passive kind that races to answer first and the active kind that sits between you and the destination. The way it works is by quietly rewriting outgoing network packets so the DPI box no longer recognises them, while the real destination still understands them. The README describes a long list of tricks: splitting packets into smaller pieces, sending them out of order, mixing the upper and lower case of the website name in the request header, sending decoy packets with a wrong checksum, or shortening the lifetime of fake packets so they fool the inspector but never reach the real server. There is also an option to redirect domain-name lookups to an alternative public resolver so the provider cannot poison those either. Users typically unpack the release, double-click one of the bundled batch scripts (one tuned for Russia, another for any country), and run it with administrator privileges. Someone would reach for this when their home or office connection blocks specific sites and they want a small, local workaround that does not require a paid VPN. It is a command-line program for Windows 7 through 11, written in C. The full README is longer than what was provided.