Provided by: shadowsocks-libev_3.3.5+ds-7build1_amd64 
NAME
shadowsocks-libev - a lightweight and secure socks5 proxy
SYNOPSIS
ss-local|ss-redir|ss-server|ss-tunnel|ss-manager [-s <server_host>] [-p <server_port>] [-l <local_port>]
[-k <password>] [-m <encrypt_method>] [-f <pid_file>] [-t <timeout>] [-c <config_file>]
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. One is ss-server(1) that runs on a remote server to
provide secured tunnel service. ss-local(1) and ss-redir(1) are clients on your local machines to proxy
traffic(TCP/UDP or both). ss-tunnel(1) is a tool for local port forwarding.
While ss-local(1) works as a standard socks5 proxy, ss-redir(1) works as a transparent proxy and requires
netfilter’s NAT module. For more information, check out the EXAMPLE section.
ss-manager(1) is a controller for multi-user management and traffic statistics, using UNIX domain socket
to talk with ss-server(1). Also, it provides a UNIX domain socket or IP based API for other software.
About the details of this API, please refer to the PROTOCOL section.
OPTIONS
-s <server_host>
Set the server’s hostname or IP.
-l <local_port>
Set the local port number.
Not available in server nor manager mode.
-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.
Not available in manager mode.
-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.
-n <number>
Specify max number of open files.
Not available in manager mode.
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 shadowsocks-libev 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.
Not available in redir mode.
-b <local_address>
Specify the local address to bind.
For servers: Specify the local address to use while this server is making outbound connections to
remote servers on behalf of the clients.
For clients: Specify the local address to use while this client is making outbound connections to the
server.
Not available in manager mode.
-u
Enable UDP relay.
TPROXY is required in redir mode. You may need root permission.
-U
Enable UDP relay and disable TCP relay.
Not available in local mode.
-T
Use tproxy instead of redirect (for tcp).
Only available in redir mode.
-L <addr:port>
Specify destination server address and port for local port forwarding.
Only available in tunnel mode.
-d <addr>
Setup name servers for internal DNS resolver (libc-ares). The default server is fetched from
/etc/resolv.conf.
Only available in server and manager mode.
--fast-open
Enable TCP fast open.
Not available in redir nor tunnel mode, with Linux kernel > 3.7.0.
--reuse-port
Enable port reuse.
Only available with Linux kernel > 3.9.0.
--no-delay
Enable TCP_NODELAY.
--acl <acl_config>
Enable ACL (Access Control List) and specify config file.
Not available in redir nor tunnel mode.
--manager-address <path_to_unix_domain>
Specify UNIX domain socket address.
Only available in server and manager mode.
--executable <path_to_server_executable>
Specify the executable path of ss-server.
Only available in manager mode.
-v
Enable verbose mode.
-h|--help
Print help message.
CONFIG FILE
The config file is written in JSON and easy to edit.
The config file equivalent of command line options is listed as example below.
┌─────────────────────────────────────┬──────────────────────────────────────┐
│ Command line │ JSON │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -s some.server.net │ "server": "some.server.net" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -s some.server.net -p 1234 (client) │ "server": "some.server.net:1234" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -p 1234 │ "server_port": "1234" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -b 0.0.0.0 │ "local_address": "0.0.0.0" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -b 10.0.0.2 │ "local_ipv4_address": "10.0.0.2" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -b 2620:129:35::33 │ "local_ipv6_address": │
│ │ "2620:129:35::33" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -l 4321 │ "local_port": "4321" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -k "PasSworD" │ "password": "PasSworD" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -m "aes-256-cfb" │ "method": "aes-256-cfb" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -t 60 │ "timeout": 60 │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -a nobody │ "user": "nobody" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ --acl "/path/to/acl" │ "acl": "/path/to/acl" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ --fast-open │ "fast_open": true │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ --reuse-port │ "reuse_port": true │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ --no-delay │ "no_delay": true │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ --plugin "obfs-server" │ "plugin": "obfs-server" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ --plugin-opts "obfs=http" │ "plugin_opts": "obfs=http" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -6 │ "ipv6_first": true │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -n "/etc/nofile" │ "nofile": "/etc/nofile" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -d "8.8.8.8" │ "nameserver": "8.8.8.8" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -L "somedns.net:53" │ "tunnel_address": "somedns.net:53" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -u │ "mode": "tcp_and_udp" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -U │ "mode": "udp_only" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ no "-u" nor "-U" options (default) │ "mode": "tcp_only" │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ -T │ "tcp_tproxy": true │
├─────────────────────────────────────┼──────────────────────────────────────┤
│ │ │
│ (only in ss-manager’s config) │ "port_password": {"1234":"PasSworD"} │
└─────────────────────────────────────┴──────────────────────────────────────┘
EXAMPLE
ss-redir requires netfilter’s NAT function. Here is an example:
# Create new chain
iptables -t nat -N SHADOWSOCKS
iptables -t mangle -N SHADOWSOCKS
# Ignore your shadowsocks server's addresses
# It's very IMPORTANT, just be careful.
iptables -t nat -A SHADOWSOCKS -d 123.123.123.123 -j RETURN
# Ignore LANs and any other addresses you'd like to bypass the proxy
# See Wikipedia and RFC5735 for full list of reserved networks.
# See ashi009/bestroutetb for a highly optimized CHN route list.
iptables -t nat -A SHADOWSOCKS -d 0.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 10.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 127.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 169.254.0.0/16 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 172.16.0.0/12 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 192.168.0.0/16 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 224.0.0.0/4 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 240.0.0.0/4 -j RETURN
# Anything else should be redirected to shadowsocks's local port
iptables -t nat -A SHADOWSOCKS -p tcp -j REDIRECT --to-ports 12345
# Add any UDP rules
ip rule add fwmark 0x01/0x01 table 100
ip route add local 0.0.0.0/0 dev lo table 100
iptables -t mangle -A SHADOWSOCKS -p udp --dport 53 -j TPROXY --on-port 12345 --tproxy-mark 0x01/0x01
# Apply the rules
iptables -t nat -A PREROUTING -p tcp -j SHADOWSOCKS
iptables -t mangle -A PREROUTING -j SHADOWSOCKS
# Start the shadowsocks-redir
ss-redir -u -c /etc/config/shadowsocks.json -f /var/run/shadowsocks.pid
PROTOCOL
ss-manager(1) provides several APIs through UDP protocol
Send UDP commands in the following format to the manager-address provided to ss-manager(1):
command: [JSON data]
To add a port:
add: {"server_port": 8001, "password":"7cd308cc059"}
To remove a port:
remove: {"server_port": 8001}
To receive a pong:
ping
Then ss-manager(1) will send back the traffic statistics:
stat: {"8001":11370}
SEE ALSO
ss-local(1), ss-server(1), ss-tunnel(1), ss-redir(1), ss-manager(1), iptables(8),
/etc/shadowsocks-libev/config.json
Shadowsocks-libev 3.3.5 02/18/2022 SHADOWSOCKS-LIBEV(8)