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SS-SERVER(1) Shadowsocks-libev Manual SS-SERVER(1)

ss-server - shadowsocks server, libev port

ss-server [-uUv] [-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>] [-a <user_name>] [-d <addr>] [-n <nofile>] [-b <local_address>] [--fast-open] [--reuse-port] [--mptcp] [--acl <acl_config>] [--mtu <MTU>] [--no-delay] [--manager-address <path_to_unix_domain>] [--plugin <plugin_name>] [--plugin-opts <plugin_options>] [--password <password>] [--key <key_in_base64>]

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-server(1) runs on a remote server to provide secured tunnel service. 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.
-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 18 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, salsa20, chacha20 and chacha20-ietf.
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 (, eth0 ( and eth1 ( Meanwhile, you configure ss-server 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.
Resovle hostname to IPv6 address first.
-d <addr>
Setup name servers for internal DNS resolver (libudns). The default server is fetched from /etc/resolv.conf.
Enable TCP fast open.
Only available with Linux kernel > 3.7.0.
Enable port reuse.
Only available with Linux kernel > 3.9.0.
--acl <acl_config>
Enable ACL (Access Control List) and specify config file.
--manager-address <path_to_unix_domain>
Specify UNIX domain socket address for the communication between ss-manager(1) and ss-server(1).
Only available in server and manager mode.
--mtu <MTU>
Specify the MTU of your network interface.
Enable Multipath TCP.
Only available with MPTCP enabled Linux kernel.
--plugin <plugin_name>
Enable SIP003 plugin. (Experimental)
--plugin-opts <plugin_options>
Set SIP003 plugin options. (Experimental)
Enable verbose mode.
Print help message.

It is recommended to use a config file when starting ss-server(1).
The config file is written in JSON and is easy to edit. Check out the SEE ALSO section for the default path of config file.
# Start the ss-server
ss-server -c /etc/shadowsocks-libev/config.json

The config file of shadowsocks-libev(8) is slightly different from original shadowsocks.
In order to listen to both IPv4/IPv6 address, use the following grammar in your config json file:
ss-server(1) also does not understand "port_password" field in config file. If you want to start up multiple server instances with a single config file, please try ss-manager tool. See ss-manager(8) for details.

ss-local(1), ss-tunnel(1), ss-redir(1), ss-manager(1), shadowsocks-libev(8), iptables(8), /etc/shadowsocks-libev/config.json
01/02/2019 Shadowsocks-libev 3.1.3

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