ss-redir(1) shadowsocks client as transparent proxy, libev port

SYNOPSIS

ss-redir
    [-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]    [-b local_address]
    [-a user_name]   [-n nofile]

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-redir(1) works as a transparent proxy on local machines to proxy TCP traffic and requires netfilter's NAT module. For more information, check out shadowsocks-libev(8) and the following EXAMPLE section.

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
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.

-b local_address
Specify local address to bind.
-u
Enable UDP relay.

TPROXY is required in redir mode. You may need root permission.

-U
Enable UDP relay and disable TCP relay.
-A
Enable onetime authentication.
-v
Enable verbose mode.
-h, --help
Print help message.

EXAMPLE

ss-redir requires netfilter's NAT function. Here is an example:

    # Create new chain
    [email protected]:~# iptables -t nat -N SHADOWSOCKS
    # Ignore your shadowsocks server's addresses
    # It's very IMPORTANT, just be careful.
    [email protected]:~# 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.
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -d 0.0.0.0/8 -j RETURN
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -d 10.0.0.0/8 -j RETURN
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -d 127.0.0.0/8 -j RETURN
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -d 169.254.0.0/16 -j RETURN
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -d 172.16.0.0/12 -j RETURN
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -d 192.168.0.0/16 -j RETURN
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -d 224.0.0.0/4 -j RETURN
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -d 240.0.0.0/4 -j RETURN
    # Anything else should be redirected to shadowsocks's local port
    [email protected]:~# iptables -t nat -A SHADOWSOCKS -p tcp -j REDIRECT --to-ports 12345
    # Add any UDP rules
    [email protected]:~# ip rule add fwmark 0x01/0x01 table 100
    [email protected]:~# ip route add local 0.0.0.0/0 dev lo table 100
    [email protected]:~# iptables -t mangle -A SHADOWSOCKS -p udp --dport 53 -j TPROXY --on-port 12345 --tproxy-mark 0x01/0x01
    # Apply the rules
    [email protected]:~# iptables -t nat -A PREROUTING -p tcp -j SHADOWSOCKS
    [email protected]:~# iptables -t mangle -A PREROUTING -j SHADOWSOCKS
    # Start the shadowsocks-redir
    [email protected]:~# ss-redir -u -c /etc/config/shadowsocks.json -f /var/run/shadowsocks.pid

AUTHOR

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]>.