NAME

       ss-tunnel - shadowsocks tools for local port forwarding, libev port

SYNOPSIS

       ss-tunnel [-uUv6] [-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_address>] [-a <user_name>] [-n <nofile>] [-L addr:port] [--mtu
       <MTU>] [--mptcp] [--reuse-port] [--no-delay] [--plugin <plugin_name>] [--plugin-opts
       <plugin_options>] [--key <key_in_base64>]

DESCRIPTION

       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).

OPTIONS

       -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>, --password <password>
           Set the password. The server and the client should use the same password.

       --key <key_in_base64>
           Set the key directly. The key should be encoded with URL-safe Base64.

       -m <encrypt_method>
           Set the cipher.

           Shadowsocks-libev accepts 19 different ciphers:

           aes-128-gcm, aes-192-gcm, aes-256-gcm, rc4-md5, aes-128-cfb, aes-192-cfb, aes-256-cfb,
           aes-128-ctr, aes-192-ctr, aes-256-ctr, bf-cfb, camellia-128-cfb, camellia-192-cfb,
           camellia-256-cfb, chacha20-ietf-poly1305, xchacha20-ietf-poly1305, salsa20, chacha20
           and chacha20-ietf.

           The default cipher is chacha20-ietf-poly1305.

           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.

           Refer to shadowsocks-libev(8) CONFIG FILE section for more details.

       -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 (127.0.0.1), eth0
           (192.168.0.1) and eth1 (192.168.0.2). Meanwhile, you configure ss-tunnel to listen on
           0.0.0.0:8388 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 the local address to use while this client is making outbound connections to
           the server.

       -u
           Enable UDP relay.

       -U
           Enable UDP relay and disable TCP relay.

       -6
           Resovle hostname to IPv6 address first.

       -L <addr:port>
           Specify destination server address and port for local port forwarding.

           Only used and available in tunnel mode.

       --mtu <MTU>
           Specify the MTU of your network interface.

       --mptcp
           Enable Multipath TCP.

           Only available with MPTCP enabled Linux kernel.

       --reuse-port
           Enable port reuse.

           Only available with Linux kernel > 3.9.0.

       --no-delay
           Enable TCP_NODELAY.

       --plugin <plugin_name>
           Enable SIP003 plugin. (Experimental)

       --plugin-opts <plugin_options>
           Set SIP003 plugin options. (Experimental)

       -v
           Enable verbose mode.

       -h|--help
           Print help message.

SEE ALSO

       ss-local(1), ss-server(1), ss-redir(1), ss-manager(1), shadowsocks-libev(8), iptables(8),
       /etc/shadowsocks-libev/config.json