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ss-redir(1)
===========
NAME
----
ss-redir - 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>] [--mtu <MTU>]
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:
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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.
+
Refer to `shadowsocks-libev`(8) 'CONFIG FILE' section for more details.
-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.
--mtu <MTU>::
Specify the MTU of your network interface.
--mptcp::
Enable Multipath TCP.
+
Only available with MPTCP enabled Linux kernel.
-v::
Enable verbose mode.
-h|--help::
Print help message.
EXAMPLE
-------
ss-redir requires netfilter's NAT function. Here is an example:
....
# Create new chain
root@Wrt:~# iptables -t nat -N SHADOWSOCKS
# Ignore your shadowsocks server's addresses
# It's very IMPORTANT, just be careful.
root@Wrt:~# 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.
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -d 0.0.0.0/8 -j RETURN
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -d 10.0.0.0/8 -j RETURN
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -d 127.0.0.0/8 -j RETURN
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -d 169.254.0.0/16 -j RETURN
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -d 172.16.0.0/12 -j RETURN
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -d 192.168.0.0/16 -j RETURN
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -d 224.0.0.0/4 -j RETURN
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -d 240.0.0.0/4 -j RETURN
# Anything else should be redirected to shadowsocks's local port
root@Wrt:~# iptables -t nat -A SHADOWSOCKS -p tcp -j REDIRECT --to-ports 12345
# Add any UDP rules
root@Wrt:~# ip rule add fwmark 0x01/0x01 table 100
root@Wrt:~# ip route add local 0.0.0.0/0 dev lo table 100
root@Wrt:~# iptables -t mangle -A SHADOWSOCKS -p udp --dport 53 -j TPROXY --on-port 12345 --tproxy-mark 0x01/0x01
# Apply the rules
root@Wrt:~# iptables -t nat -A PREROUTING -p tcp -j SHADOWSOCKS
root@Wrt:~# iptables -t mangle -A PREROUTING -j SHADOWSOCKS
# Start the shadowsocks-redir
root@Wrt:~# ss-redir -u -c /etc/config/shadowsocks.json -f /var/run/shadowsocks.pid
....
SEE ALSO
--------
`ss-local`(1),
`ss-server`(1),
`ss-tunnel`(1),
`ss-manager`(1),
`shadowsocks-libev`(8),
`iptables`(8),
/etc/shadowsocks-libev/config.json