HYSTERIA

Hysteria is a UDP-based proxy built on a customized QUIC stack, designed to keep throughput usable on lossy or throttled links. Its signature feature is brutal congestion control, which sends at a configured rate instead of backing off like TCP-friendly algorithms. Authentication uses an auth parameter or userinfo string, and optional obfuscation can disguise the UDP traffic. The protocol was superseded by Hysteria2, which simplifies the design, but first-generation endpoints still appear in public lists.