Case study

OpenSnell: reconstructing the Snell v4/v5 proxy protocol

OpenSnell reconstructs the Snell v4/v5 proxy protocol in a Go client and server. It handles TCP CONNECT, UDP over TCP, HTTP and TLS obfuscation, with v5 QUIC proxy mode on the server. The author reports interoperability against Surge snell-server v5.0.1.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06

Stars: 101
Last commit: 2026-10-29
Language: Go
License (GitHub): GPL-3.0

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: Go 1.24 is specified by go.mod.
Limits: Snell v5 QUIC proxy mode is server-side only.
Scope: The repository publishes v4/v5 code; its documented v6 implementation is closed source.
License: GPL-3.0 license.

Cite

BibTeX

@misc{opensnell-case,
  title = {{OpenSnell: reconstructing the Snell v4/v5 proxy protocol}},
  howpublished = {\url{https://github.com/missuo/opensnell}},
  url = {https://github.com/missuo/opensnell},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/opensnell-case/}}
}

Plain text

OpenSnell: reconstructing the Snell v4/v5 proxy protocol. https://github.com/missuo/opensnell (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/opensnell-case/

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About this entry

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Primary sources

README.md GitHub · missuo/opensnell · Revision 49a61f2
SNELL_V6.md GitHub · missuo/opensnell · Revision 49a61f2