Mxmilu666andClaude Opus 5.5
ae7135ab64
A handshake message may span any number of records, and splitting the ClientHello into tiny records hides the SNI from analyzers that expect it in the first one. The tls analyzer read the first record header and then cut the handshake body straight out of the stream, so fragmented hellos either stalled until Limit() or failed to parse, and every SNI rule was bypassed. The record layer is now peeled off and the hello rebuilt from the record bodies before parsing, for both ClientHello and ServerHello. The number of records a hello spanned is exposed as tls.req_records / tls.resp_records, kept outside req/resp so a non-nil req still means a fully parsed hello. Fragmentation is published as soon as a second record shows up, since 1-byte records can stretch a hello past Limit() and it never completes. docs: add TLS record fragmentation doc, correct the claim in the TCP window evasion doc that tls is unaffected by splitting. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Caution
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OpenGFW is your very own DIY Great Firewall of China (https://en.wikipedia.org/wiki/Great_Firewall), available as a flexible, easy-to-use open source program on Linux. Why let the powers that be have all the fun? It's time to give power to the people and democratize censorship. Bring the thrill of cyber-sovereignty right into your home router and start filtering like a pro - you too can play Big Brother.
Documentation site: https://gfw.dev/
Telegram group: https://t.me/OpGFW
Caution
This project is still in very early stages of development. Use at your own risk. We are looking for contributors to help us improve and expand the project.
Features
- Full IP/TCP reassembly, various protocol analyzers
- HTTP, TLS, QUIC, DNS, SSH, SOCKS4/5, WireGuard, OpenVPN, Minecraft, EasyTier, and many more to come
- "Fully encrypted traffic" detection for Shadowsocks, VMess, etc. (https://gfw.report/publications/usenixsecurity23/en/)
- Trojan (proxy protocol) detection
- [WIP] Machine learning based traffic classification
- Full IPv4 and IPv6 support
- Flow-based multicore load balancing
- Connection offloading
- Powerful rule engine based on expr
- Hot-reloadable rules (send
SIGHUPto reload) - Flexible analyzer & modifier framework
- Extensible IO implementation (only NFQueue for now)
- [WIP] Web UI
Use cases
- Ad blocking
- Parental control
- Malware protection
- Abuse prevention for VPN/proxy services
- Traffic analysis (log only mode)
- Help you fulfill your dictatorial ambitions