go-shadowsocks2
A fresh implementation of Shadowsocks in Go.
GoDoc at https://godoc.org/github.com/shadowsocks/go-shadowsocks2/
Features
- SOCKS5 proxy with UDP Associate
- Support for Netfilter TCP redirect (IPv6 should work but not tested)
- UDP tunneling (e.g. relay DNS packets)
- TCP tunneling (e.g. benchmark with iperf3)
- SIP003 plugins
Install
Pre-built binaries for common platforms are available at https://github.com/shadowsocks/go-shadowsocks2/releases
Install from source
go get -u -v github.com/shadowsocks/go-shadowsocks2
Basic Usage
Server
Start a server listening on port 8488 using AEAD_CHACHA20_POLY1305
AEAD cipher with password your-password
.
go-shadowsocks2 -s 'ss://AEAD_CHACHA20_POLY1305:your-password@:8488' -verbose
Client
Start a client connecting to the above server. The client listens on port 1080 for incoming SOCKS5 connections, and tunnels both UDP and TCP on port 8053 and port 8054 to 8.8.8.8:53 and 8.8.4.4:53 respectively.
go-shadowsocks2 -c 'ss://AEAD_CHACHA20_POLY1305:your-password@[server_address]:8488' \
-verbose -socks :1080 -u -udptun :8053=8.8.8.8:53,:8054=8.8.4.4:53 \
-tcptun :8053=8.8.8.8:53,:8054=8.8.4.4:53
Replace [server_address]
with the server's public address.
Advanced Usage
Netfilter TCP redirect (Linux only)
The client offers -redir
and -redir6
(for IPv6) options to handle TCP connections
redirected by Netfilter on Linux. The feature works similar to ss-redir
from shadowsocks-libev
.
Start a client listening on port 1082 for redirected TCP connections and port 1083 for redirected TCP IPv6 connections.
go-shadowsocks2 -c 'ss://AEAD_CHACHA20_POLY1305:your-password@[server_address]:8488' -redir :1082 -redir6 :1083
TCP tunneling
The client offers -tcptun [local_addr]:[local_port]=[remote_addr]:[remote_port]
option to tunnel TCP.
For example it can be used to proxy iperf3 for benchmarking.
Start iperf3 on the same machine with the server.
iperf3 -s
By default iperf3 listens on port 5201.
Start a client on the same machine with the server. The client listens on port 1090 for incoming connections and tunnels to localhost:5201 where iperf3 is listening.
go-shadowsocks2 -c 'ss://AEAD_CHACHA20_POLY1305:your-password@[server_address]:8488' -tcptun :1090=localhost:5201
Start iperf3 client to connect to the tunneld port instead
iperf3 -c localhost -p 1090
SIP003 Plugins (Experimental)
Both client and server support SIP003 plugins.
Use -plugin
and -plugin-opts
parameters to enable.
Client:
go-shadowsocks2 -c 'ss://AEAD_CHACHA20_POLY1305:your-password@[server_address]:8488' \
-verbose -socks :1080 -u -plugin v2ray
Server:
go-shadowsocks2 -s 'ss://AEAD_CHACHA20_POLY1305:your-password@:8488' -verbose \
-plugin v2ray -plugin-opts "server"
Note:
It will look for the plugin in the current directory first, then $PATH
.
UDP connections will not be affected by SIP003.
Design Principles
The code base strives to
- be idiomatic Go and well organized;
- use fewer external dependences as reasonably possible;
- only include proven modern ciphers;