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shadowsocks-libev/README.md
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2013-05-23 16:35:39 +08:00

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shadowsocks-libev
=================
Intro
-----
[Shadowsocks-libev](http://shadowsocks.org) is a lightweight secured scoks5
proxy for embedded devices and low end boxes.
It is a port of [shadowsocks](https://github.com/clowwindy/shadowsocks)
created by [@clowwindy](https://github.com/clowwindy) maintained by
[@madeye](https://github.com/madeye).
Current version: 1.3 [![Build Status](https://travis-ci.org/madeye/shadowsocks-libev.png?branch=master)](https://travis-ci.org/madeye/shadowsocks-libev)
Changelog
---------
shadowsocks 1.3 -- Thu, 16 May 2013 10:51:15 +0800
* Able to bind connections to specific interface
* Support more ciphers: aes-128-cfb, aes-192-cfb, aes-256-cfb, bf-cfb, cast5-cfb, des-cfb
shadowsocks 1.2 -- Tue, 07 May 2013 14:10:33 +0800
* Close timeouted TCP connections
* Fix a high load issue
shadowsocks 1.1 -- Wed, 10 Apr 2013 12:11:36 +0800
* Fix a IPV6 resolve issue
shadowsocks 1.0 -- Sat, 06 Apr 2013 16:59:15 +0800
* Initial release
Features
--------
Shadowsocks-libev is writen in pure C and only depends on
[libev](http://software.schmorp.de/pkg/libev.html).
When statically linked and packaged for OpenWRT, the total package size is 23KB.
In normal usage, the memory consumption is about 600KB and the CPU utilization is
no more than 5% on a low-end router (Buffalo WHR-G300N V2 with a 400MHz MIPS CPU,
32MB memory and 4MB flash).
Installation
------------
Build the binary like this:
```bash
sudo apt-get install build-essential autoconf libtool libssl-dev
./configure && make
sudo make install
```
Usage
-----
```
usage:
ss-local -s server_host -p server_port -l local_port -k password
[-m encrypt_method] [-f pid_file] [-t timeout] [-c config_file]
ss-redir -s server_host -p server_port -l local_port -k password
[-m encrypt_method] [-f pid_file] [-t timeout] [-c config_file]
ss-server -s server_host -p server_port -k password
[-m encrypt_method] [-f pid_file] [-t timeout] [-c config_file]
options:
encrypt_method: table, rc4, aes-128-cfb, aes-192-cfb, aes-256-cfb,
bf-cfb, cast5-cfb, des-cfb
pid_file: valid path to the pid file
timeout: socket timeout in senconds
config_file: json format config file
notes:
ss-redir provides a transparent proxy function and only works on the
Linux platform with iptables.
```
## Advanced usage
The latest shadowsocks-libev has provided a transparent mode. You can configure your linux based box or router to proxy all tcp traffic transparently.
# 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
# Apply the rules
root@Wrt:~# iptables -t nat -A OUTPUT -p tcp -j SHADOWSOCKS
# Start the shadowsocks-redir
root@Wrt:~# ss-redir -c /etc/config/shadowsocks.json -f /var/run/shadowsocks.pid
## Security Tips
Although shadowsocks-libev can handle thousands of concurrent connections nicely, we still recommend to
set up your server's firewall rules to limit connections from each user.
# Up to 32 connections are enough for normal usages
iptables -A INPUT -p tcp --syn --dport ${SHADOWSOCKS_PORT} -m connlimit --connlimit-above 32 -j REJECT --reject-with tcp-reset
## License
Copyright (C) 2013 Max Lv <max.c.lv@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.