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+## Fork changes vs upstream (apernet/hysteria)
+
+This fork adds the following features on top of the original Hysteria 2:
+
+- **L3 VPN Tunnel** — full IP tunnel over QUIC with TUN interface and IP pool
+- **FileMask Noise** — obfuscation layer that masks traffic as encrypted file downloads (AES-GCM)
+- **Hysteria Outbound** — chain multiple Hysteria servers (use one as upstream outbound)
+- **TLS 1.3 Mimic Obfuscation** — wraps QUIC packets in TLS 1.3 record headers to bypass DPI
+- **Multi-mode Obfuscation** — auto-detects Salamander / TLS-mimic / plain clients on the same port
+- **Random Padding & Jitter** — obfuscation options to break constant-packet-size and constant-bitrate DPI patterns
+- **Session Recreation** — periodic client reconnection (`MaxSessionDuration`) to avoid long-lived session detection
+- **Plain client support** — stock Hysteria 2 clients connect without obfuscation on the same port
+
 **If you find Hysteria useful, consider giving it a ⭐️!**
 
 [![Star History Chart](https://api.star-history.com/svg?repos=apernet/hysteria&type=Date)](https://star-history.com/#apernet/hysteria&Date)