ss-tunnel(1) shadowsocks tools for local port forwarding, libev port


    [-AuUv]          [-h|--help]
    [-s server_host] [-p server_port]    [-l local_port]
    [-k password]    [-m encrypt_method] [-f pid_file]
    [-t timeout]     [-c config_file]    [-i interface]
    [-b local_addr]  [-a user_name]      [-n nofile]
    [-L addr:port]


Shadowsocks-libev is a lightweight and secure socks5 proxy. It is a port of the original shadowsocks created by clowwindy. Shadowsocks-libev is written in pure C and takes advantage of libev to achieve both high performance and low resource consumption.

Shadowsocks-libev consists of five components. ss-tunnel(1) is a tool for local port forwarding. See OPTIONS section for special option needed by ss-tunnel(1). For more information, check out shadowsocks-libev(8).


-s server_host
Set the server's hostname or IP.
-p server_port
Set the server's port number.
-l local_port
Set the local port number.
-k password
Set the password. The server and the client should use the same password.
-m encrypt_method
Set the cipher.

Shadowsocks-libev accepts 18 different ciphers: table, rc4, rc4-md5, aes-128-cfb, aes-192-cfb, aes-256-cfb, bf-cfb, camellia-128-cfb, camellia-192-cfb, camellia-256-cfb, cast5-cfb, des-cfb, idea-cfb, rc2-cfb, seed-cfb, salsa20, chacha20 and chacha20-ietf. The default cipher is table.

If built with PolarSSL or custom OpenSSL libraries, some of these ciphers may not work.

-a user_name
Run as a specific user.
-f pid_file
Start shadowsocks as a daemon with specific pid file.
-t timeout
Set the socket timeout in seconds. The default value is 60.
-c config_file
Use a configuration file.
-n number
Specify max number of open files.

Only available on Linux.

-i interface
Send traffic through specific network interface.

For example, there are three interfaces in your device, which is lo (, eth0 ( and eth1 ( Meanwhile, you configure ss-tunnel to listen on and bind to eth1. That results the traffic go out through eth1, but not lo nor eth0. This option is useful to control traffic in multi-interface environment.

-b local_address
Specify local address to bind.
Enable UDP relay.
Enable UDP relay and disable TCP relay.
Enable onetime authentication.
-L addr:port
Specify destination server address and port for local port forwarding.

Only used and available in tunnel mode.

Enable verbose mode.
-h, --help
Print help message.


shadowsocks was created by clowwindy <[email protected]> and shadowsocks-libev was maintained by Max Lv <[email protected]> and Linus Yang <[email protected]>.

This manual page was written by Max Lv <[email protected]>.

The manual pages were rearranged by hosiet <[email protected]>.