Protocol¶

As described in Proxy, Forwarding and Tunnel, a GOST service or node is divided into two layers, the data processing layer and the data channel layer, each layer corresponds to a network protocol. The two layers are independent of each other and can be used in any combination (except for some restrictions).

Data Processing¶

Data processing is divided into two types: proxy and forwarding.

Proxy¶

http - HTTP
http2 - HTTP2
socks4 - SOCKS4/SOCKS4A
socks，socks5 - SOCKS5
ss - Shadowsocks
ssu - Shadowsocks UDP relay
sni - SNI
relay - Relay

Forwarding¶

tcp - TCP port forwarding
udp - UDP port forwarding
rtcp - TCP remote port forwarding
rudp - UDP remote port forwarding

Data Channel¶

The data channel is used to carry proxy or forward protocol data. Currently supported data channel protocols are:

tcp - Raw TCP protocol
mtcp - Multiplex over raw TCP
udp - Raw UDP protocol
tls - TLS
dtls - DTLS
mtls - Multiplex over TLS
ws - Websocket
mws - Multiplex over Websocket
wss - Websocket Secure
mwss - Multiplex over Websocket Secure
h2 - HTTP2
h2c - HTTP2 Cleartext
grpc - gRPC
pht - Plain HTTP Tunnel
ssh，sshd - SSH
kcp - KCP
quic - QUIC
h3 - PHT over HTTP/3
wt - HTTP/3 WebTransport
ohttp - HTTP Obfuscation
otls - TLS Obfuscation
icmp, icmp6 - ICMP, ICMPv6
ftcp - Fake TCP

Some Special Protocols¶

file: HTTP File Server
https: Equivalent to HTTP proxy and TLS channel combination (http+tls)
http3: HTTP3 reverse proxy service
dns: DNS Proxy
red，redir，redirect: TCP Transparent Proxy
redu: UDP Transparent Proxy
tun: TUN Device
tap: TAP Device
forward: Server-Side Forwarding
virtual: Virtual Node
unix: Unix Domain Socket Redirector
serial: Serial Port Redirector

Limitation¶

All data channels based on UDP protocol (such as kcp, quic, h3, wt, including icmp) can only be used for the first-level nodes in the forwarding chain.