shadowsocks-libev ================= Intro ----- [Shadowsocks-libev](http://shadowsocks.org) is a lightweight secured socks5 proxy for embedded devices and low end boxes. It is a port of [shadowsocks](https://github.com/shadowsocks/shadowsocks) created by [@clowwindy](https://github.com/clowwindy) maintained by [@madeye](https://github.com/madeye) and [@linusyang](https://github.com/linusyang). Current version: 2.1.1 | [![Build Status](https://travis-ci.org/shadowsocks/shadowsocks-libev.png?branch=master)](https://travis-ci.org/shadowsocks/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 #### Install from repository Add GPG public key ```bash wget -O- http://shadowsocks.org/debian/1D27208A.gpg | sudo apt-key add - ``` 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-libev ``` #### Build package from source ``` bash cd shadowsocks-libev sudo apt-get install build-essential autoconf libtool libssl-dev gawk debhelper dpkg-buildpackage -us -uc cd .. sudo dpkg -i shadowsocks-libev*.deb ``` #### Configure and start the service ``` # Edit the configuration sudo vim /etc/shadowsocks-libev/config.json # Start the service sudo /etc/init.d/shadowsocks-libev start ``` ### Fedora & RHEL Supported distributions include - Fedora 20, 21, rawhide - RHEL 6, 7 and derivatives (including CentOS, Scientific Linux) #### Install from repository Enable repo via `dnf`: ``` su -c 'dnf copr enable librehat/shadowsocks' ``` Or download yum repo on [Fedora Copr](https://copr.fedoraproject.org/coprs/librehat/shadowsocks/) and put it inside `/etc/yum.repos.d/`. The release `Epel` is for RHEL and its derivatives. Then, install `shadowsocks-libev` via `dnf`: ```bash su -c 'dnf update' su -c 'dnf install shadowsocks-libev' ``` or `yum`: ```bash su -c 'yum update' su -c 'yum install shadowsocks-libev' ``` ### 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/shadowsocks/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 ----- ``` 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: 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 and chacha20 [-f ] the file path to store pid [-t ] socket timeout in seconds [-c ] the path to config file [-i ] network interface to bind, not available in redir mode [-b ] local address to bind, not available in server mode [-u] enable udprelay mode, not available in redir mode [-L :] specify destination server address and port for local port forwarding, only available in tunnel mode [-d ] setup name servers for internal DNS resolver, only available in server mode [--fast-open] enable TCP fast open, only available on Linux kernel > 3.7.0 [--acl ] config file of ACL (Access Control List) [-v] verbose mode 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 .