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) and [@linusyang](https://github.com/linusyang). Current version: 1.4.6 | [![Build Status](https://travis-ci.org/madeye/shadowsocks-libev.png?branch=master)](https://travis-ci.org/madeye/shadowsocks-libev) | [Changelog](Changes) Features -------- Shadowsocks-libev is writen in pure C and only depends on [libev](http://software.schmorp.de/pkg/libev.html) and [openssl](http://www.openssl.org/) or [polarssl](https://polarssl.org/). In normal usage, the memory footprint 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 ------------ #### Notes about PolarSSL * Default crypto library is OpenSSL. To build against PolarSSL, specify `--with-crypto-library=polarssl` and `--with-polarssl=/path/to/polarssl` when running `./configure`. * PolarSSL __1.2.5 or newer__ is required. Currently, PolarSSL does __NOT__ support CAST5-CFB, DES-CFB, IDEA-CFB, RC2-CFB and SEED-CFB. * RC4 is only support by PolarSSL __1.3.0 or above__. ### Debian & Ubuntu Add either of the following lines to your /etc/apt/sources.list ``` # Debian Wheezy, Ubuntu 12.04 or any distribution with libssl > 1.0.1 deb http://shadowsocks.org/debian wheezy main # Debian Squeeze, Ubuntu 11.04, or any distribution with libssl > 0.9.8, but < 1.0.0 deb http://shadowsocks.org/debian squeeze main ``` Then, ``` bash sudo apt-get update sudo apt-get install shadowsocks # Edit the configuration sudo vim /etc/shadowsocks/config.json # Start the service sudo /etc/init.d/shadowsocks start ``` ### CentOS Install the dependencies, ```bash yum install -y gcc automake autoconf libtool make build-essential autoconf libtool yum install -y curl curl-devel zlib-devel openssl-devel perl perl-devel cpio expat-devel gettext-devel ``` Compile and install, ```bash ./configure && make make install ``` Then copy this [init script](rpm/SOURCES/etc/init.d/shadowsocks) to `/etc/init.d/`. ### Linux For Unix-like systems, especially Debian-based systems, e.g. Ubuntu, Debian or Linux Mint, you can build the binary like this: ```bash sudo apt-get install build-essential autoconf libtool libssl-dev ./configure && make sudo make install ``` ### FreeBSD ```bash su cd /usr/ports/net/shadowsocks-libev make install ``` Edit your config.json file. By default, it's located in /usr/local/etc/shadowsocks-libev To enable shadowsocks-libev, add the following rc variable to your /etc/rc.conf file. ``` shadowsocks_libev_enable="YES" ``` Start the shadowsocks server: ```bash service shadowsocks_libev start ``` ### OpenWRT ```bash # At OpenWRT build root pushd package git clone https://github.com/madeye/shadowsocks-libev.git popd # Enable shadowsocks-libev in network category make menuconfig # Optional make -j # Build the package make V=99 package/shadowsocks-libev/openwrt/compile ``` ### Windows For Windows, use either MinGW (msys) or Cygwin to build. At the moment, only `ss-local` is supported to build against MinGW (msys). If you are using MinGW (msys), please download OpenSSL or PolarSSL source tarball to the home directory of msys, and build it like this (may take a few minutes): * OpenSSL ```bash tar zxf openssl-1.0.1e.tar.gz cd openssl-1.0.1e ./config --prefix="$HOME/prebuilt" --openssldir="$HOME/prebuilt/openssl" make && make install ``` * PolarSSL ```bash tar zxf polarssl-1.3.2-gpl.tgz cd polarssl-1.3.2 make lib WINDOWS=1 make install DESTDIR="$HOME/prebuilt" ``` Then, build the binary using the commands below, and all `.exe` files will be built at `$HOME/ss/bin`: * OpenSSL ```bash ./configure --prefix="$HOME/ss" --with-openssl="$HOME/prebuilt" make && make install ``` * PolarSSL ```bash ./configure --prefix="$HOME/ss" --with-crypto-library=polarssl --with-polarssl=$HOME/prebuilt make && make install ``` Usage ----- ``` usage: ss-[local|redir|server|tunnel] -s host name or ip address of your remote server -p port number of your remote server -l port number of your local server -k password of your remote server [-m ] encrypt method, supporting table, rc4, 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 and seed-cfb [-f ] valid path to the pid file [-t ] socket timeout in seconds [-c ] json format config file [-i ] specific network interface to bind, not available in redir mode [-b ] specific local address to bind, not available in server mode [-u] udprelay mode to supprot udp traffic not available in redir mode [-L :] setup a local port forwarding tunnel only available in tunnel mode [-v] verbose mode, debug output in console 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 *redir* 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) 2014 Max Lv 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 .