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# shadowsocks-libev
[![Build Status](https://travis-ci.com/shadowsocks/shadowsocks-libev.svg?branch=master)](https://travis-ci.com/shadowsocks/shadowsocks-libev) [![Snap Status](https://snapcraft.io/shadowsocks-libev/badge.svg)](https://snapcraft.io/shadowsocks-libev)
## Intro
[Shadowsocks-libev](https://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), and maintained by
[@madeye](https://github.com/madeye) and [@linusyang](https://github.com/linusyang).
Current version: 3.3.5 | [Changelog](debian/changelog)
## Features
Shadowsocks-libev is written in pure C and depends on [libev](http://software.schmorp.de/pkg/libev.html). It's designed
to be a lightweight implementation of shadowsocks protocol, in order to keep the resource usage as low as possible.
For a full list of feature comparison between different versions of shadowsocks,
refer to the [Wiki page](https://github.com/shadowsocks/shadowsocks/wiki/Feature-Comparison-across-Different-Versions).
## Quick Start
Snap is the recommended way to install the latest binaries.
### Install snap core
https://snapcraft.io/core
### Install from snapcraft.io
Stable channel:
```bash
sudo snap install shadowsocks-libev
```
Edge channel:
```bash
sudo snap install shadowsocks-libev --edge
```
## Installation
### Distribution-specific guide
- [Debian & Ubuntu](#debian--ubuntu)
+ [Install from repository](#install-from-repository-not-recommended)
+ [Build deb package from source](#build-deb-package-from-source)
+ [Configure and start the service](#configure-and-start-the-service)
- [Fedora & RHEL](#fedora--rhel)
+ [Build from source with centos](#build-from-source-with-centos)
- [Archlinux & Manjaro](#archlinux--manjaro)
- [NixOS](#nixos)
- [Nix](#nix)
- [Directly build and install on UNIX-like system](#linux)
- [FreeBSD](#freebsd)
+ [Install](#install)
+ [Configuration](#configuration)
+ [Run](#run)
+ [Run as client](#run-as-client)
- [OpenWRT](#openwrt)
- [OS X](#os-x)
- [Windows (MinGW)](#windows-mingw)
- [Docker](#docker)
* * *
### Initialise the build environment
This repository uses submodules, so you should pull them before you start, using:
```bash
git submodule update --init --recursive
```
### Pre-build configure guide
For a complete list of available configure-time option,
try `configure --help`.
### Debian & Ubuntu
#### Install from repository (not recommended)
Shadowsocks-libev is available in the official repository for following distributions:
* Debian 8 or higher, including oldoldstable (jessie), old stable (stretch), stable (buster), testing (bullseye) and unstable (sid)
* Ubuntu 16.10 or higher
```bash
sudo apt update
sudo apt install shadowsocks-libev
```
#### Build deb package from source
Supported distributions:
* Debian 8, 9 or higher
* Ubuntu 14.04 LTS, 16.04 LTS, 16.10 or higher
You can build shadowsocks-libev and all its dependencies by script:
```bash
mkdir -p ~/build-area/
cp ./scripts/build_deb.sh ~/build-area/
cd ~/build-area
./build_deb.sh
```
For older systems, building `.deb` packages is not supported.
Please try to build and install directly from source. See the [Linux](#linux) section below.
**Note for Debian 8 (Jessie) users to build their own deb packages**:
We strongly encourage you to install shadowsocks-libev from `jessie-backports-sloppy`. If you insist on building from source, you will need to manually install libsodium from `jessie-backports-sloppy`, **NOT** libsodium in main repository.
For more info about backports, you can refer [Debian Backports](https://backports.debian.org).
``` bash
cd shadowsocks-libev
sudo sh -c 'printf "deb http://deb.debian.org/debian jessie-backports main" > /etc/apt/sources.list.d/jessie-backports.list'
sudo sh -c 'printf "deb http://deb.debian.org/debian jessie-backports-sloppy main" >> /etc/apt/sources.list.d/jessie-backports.list'
sudo apt-get install --no-install-recommends devscripts equivs
mk-build-deps --root-cmd sudo --install --tool "apt-get -o Debug::pkgProblemResolver=yes --no-install-recommends -y"
./autogen.sh && dpkg-buildpackage -b -us -uc
cd ..
sudo dpkg -i shadowsocks-libev*.deb
```
**Note for Debian 9 (Stretch) users to build their own deb packages**:
We strongly encourage you to install shadowsocks-libev from `stretch-backports`. If you insist on building from source, you will need to manually install libsodium from `stretch-backports`, **NOT** libsodium in main repository.
For more info about backports, you can refer [Debian Backports](https://backports.debian.org).
``` bash
cd shadowsocks-libev
sudo sh -c 'printf "deb http://deb.debian.org/debian stretch-backports main" > /etc/apt/sources.list.d/stretch-backports.list'
sudo apt-get install --no-install-recommends devscripts equivs
mk-build-deps --root-cmd sudo --install --tool "apt-get -o Debug::pkgProblemResolver=yes --no-install-recommends -y"
./autogen.sh && dpkg-buildpackage -b -us -uc
cd ..
sudo dpkg -i shadowsocks-libev*.deb
```
#### Configure and start the service
```
# Edit the configuration file
sudo vim /etc/shadowsocks-libev/config.json
# Edit the default configuration for debian
sudo vim /etc/default/shadowsocks-libev
# Start the service
sudo /etc/init.d/shadowsocks-libev start # for sysvinit, or
sudo systemctl start shadowsocks-libev # for systemd
```
### Fedora & RHEL
Supported distributions:
* Recent Fedora versions (until EOL)
* RHEL 6, 7 and derivatives (including CentOS, Scientific Linux)
#### Build from source with centos
If you are using CentOS 7, you need to install these prerequirements to build from source code:
```bash
yum install epel-release -y
yum install gcc gettext autoconf libtool automake make pcre-devel asciidoc xmlto c-ares-devel libev-devel libsodium-devel mbedtls-devel -y
```
### Archlinux & Manjaro
```bash
sudo pacman -S shadowsocks-libev
```
Please refer to downstream [PKGBUILD](https://github.com/archlinux/svntogit-community/blob/packages/shadowsocks-libev/trunk/PKGBUILD)
script for extra modifications and distribution-specific bugs.
### NixOS
```bash
nix-env -iA nixos.shadowsocks-libev
```
### Nix
```bash
nix-env -iA nixpkgs.shadowsocks-libev
```
### Linux
In general, you need the following build dependencies:
* autotools (autoconf, automake, libtool)
* gettext
* pkg-config
* libmbedtls
* libsodium
* libpcre3 (old pcre library)
* libev
* libc-ares
* asciidoc (for documentation only)
* xmlto (for documentation only)
Notes: Fedora 26 libsodium version >= 1.0.12, so you can install via dnf install libsodium instead build from source.
If your system is too old to provide libmbedtls and libsodium (later than **v1.0.8**), you will need to either install those libraries manually or upgrade your system.
If your system provides with those libraries, you **should not** install them from source.You should jump to this section and install them from the distribution repository instead.
For some of the distributions, you might install build dependencies like this:
```bash
# Installation of basic build dependencies
## Debian / Ubuntu
sudo apt-get install --no-install-recommends gettext build-essential autoconf libtool libpcre3-dev asciidoc xmlto libev-dev libc-ares-dev automake libmbedtls-dev libsodium-dev pkg-config
## CentOS / Fedora / RHEL
sudo yum install gettext gcc autoconf libtool automake make asciidoc xmlto c-ares-devel libev-devel
## Arch
sudo pacman -S gettext gcc autoconf libtool automake make asciidoc xmlto c-ares libev
# Installation of libsodium
export LIBSODIUM_VER=1.0.16
wget https://download.libsodium.org/libsodium/releases/old/libsodium-$LIBSODIUM_VER.tar.gz
tar xvf libsodium-$LIBSODIUM_VER.tar.gz
pushd libsodium-$LIBSODIUM_VER
./configure --prefix=/usr && make
sudo make install
popd
sudo ldconfig
# Installation of MbedTLS
export MBEDTLS_VER=2.6.0
wget https://github.com/Mbed-TLS/mbedtls/archive/refs/tags/mbedtls-$MBEDTLS_VER.tar.gz
tar xvf mbedtls-$MBEDTLS_VER.tar.gz
pushd mbedtls-$MBEDTLS_VER
make SHARED=1 CFLAGS="-O2 -fPIC"
sudo make DESTDIR=/usr install
popd
sudo ldconfig
# Start building
./autogen.sh && ./configure && make
sudo make install
```
You may need to manually install missing softwares.
### FreeBSD
#### Install
Shadowsocks-libev is available in FreeBSD Ports Collection. You can install it in either way, `pkg` or `ports`.
**pkg (recommended)**
```bash
pkg install shadowsocks-libev
```
**ports**
```bash
cd /usr/ports/net/shadowsocks-libev
make install
```
#### Configuration
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"
```
#### Run
Start the Shadowsocks server:
```bash
service shadowsocks_libev start
```
#### Run as client
By default, shadowsocks-libev is running as a server in FreeBSD. If you would like to start shadowsocks-libev in client mode, you can modify the rc script (`/usr/local/etc/rc.d/shadowsocks_libev`) manually.
```
# modify the following line from "ss-server" to "ss-local"
command="/usr/local/bin/ss-local"
```
Note that is simply a workaround, each time you upgrade the port your changes will be overwritten by the new version.
### OpenWRT
The OpenWRT project is maintained here:
[openwrt-shadowsocks](https://github.com/shadowsocks/openwrt-shadowsocks).
### OS X
For OS X, use [Homebrew](http://brew.sh) to install or build.
Install Homebrew:
```bash
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
```
Install shadowsocks-libev:
```bash
brew install shadowsocks-libev
```
### Windows (MinGW)
To build Windows native binaries, the recommended method is to use Docker:
* On Windows: double-click `make.bat` in `docker\mingw`
* On Unix-like system:
cd shadowsocks-libev/docker/mingw
make
A tarball with 32-bit and 64-bit binaries will be generated in the same directory.
You could also manually use MinGW-w64 compilers to build in Unix-like shell (MSYS2/Cygwin), or cross-compile on Unix-like systems (Linux/MacOS). Please refer to build scripts in `docker/mingw`.
Currently you need to use a patched libev library for MinGW:
* https://github.com/shadowsocks/libev/archive/mingw.zip
Notice that TCP Fast Open (TFO) is only available on **Windows 10**, **1607** or later version (precisely, build >= 14393). If you are using **1709** (build 16299) or later version, you also need to run the following command in PowerShell/Command Prompt **as Administrator** and **reboot** to use TFO properly:
netsh int tcp set global fastopenfallback=disabled
### Docker
As you expect, simply pull the image and run.
```
docker pull shadowsocks/shadowsocks-libev
docker run -e PASSWORD=<password> -p<server-port>:8388 -p<server-port>:8388/udp -d shadowsocks/shadowsocks-libev
```
More information about the image can be found [here](docker/alpine/README.md).
## Usage
For a detailed and complete list of all supported arguments,
you may refer to the man pages of the applications, respectively.
ss-[local|redir|server|tunnel|manager]
-s <server_host> Host name or IP address of your remote server.
-p <server_port> Port number of your remote server.
-l <local_port> Port number of your local server.
-k <password> Password of your remote server.
-m <encrypt_method> Encrypt method: rc4-md5,
aes-128-gcm, aes-192-gcm, aes-256-gcm,
aes-128-cfb, aes-192-cfb, aes-256-cfb,
aes-128-ctr, aes-192-ctr, aes-256-ctr,
camellia-128-cfb, camellia-192-cfb,
camellia-256-cfb, bf-cfb,
chacha20-ietf-poly1305,
xchacha20-ietf-poly1305,
salsa20, chacha20 and chacha20-ietf.
The default cipher is chacha20-ietf-poly1305.
[-a <user>] Run as another user.
[-f <pid_file>] The file path to store pid.
[-t <timeout>] Socket timeout in seconds.
[-c <config_file>] The path to config file.
[-n <number>] Max number of open files.
[-i <interface>] Network interface to bind.
(not available in redir mode)
[-b <local_address>] Local address to bind.
For servers: Specify the local address to use
while this server is making outbound
connections to remote servers on behalf of the
clients.
For clients: Specify the local address to use
while this client is making outbound
connections to the server.
[-u] Enable UDP relay.
(TPROXY is required in redir mode)
[-U] Enable UDP relay and disable TCP relay.
(not available in local mode)
[-T] Use tproxy instead of redirect. (for tcp)
(only available in redir mode)
[-L <addr>:<port>] Destination server address and port
for local port forwarding.
(only available in tunnel mode)
[-6] Resolve hostname to IPv6 address first.
[-d <addr>] Name servers for internal DNS resolver.
(only available in server mode)
[--reuse-port] Enable port reuse.
[--fast-open] Enable TCP fast open.
with Linux kernel > 3.7.0.
(only available in local and server mode)
[--acl <acl_file>] Path to ACL (Access Control List).
(only available in local and server mode)
[--manager-address <addr>] UNIX domain socket address.
(only available in server and manager mode)
[--mtu <MTU>] MTU of your network interface.
[--mptcp] Enable Multipath TCP on MPTCP Kernel.
[--no-delay] Enable TCP_NODELAY.
[--executable <path>] Path to the executable of ss-server.
(only available in manager mode)
[-D <path>] Path to the working directory of ss-manager.
(only available in manager mode)
[--key <key_in_base64>] Key of your remote server.
[--plugin <name>] Enable SIP003 plugin. (Experimental)
[--plugin-opts <options>] Set SIP003 plugin options. (Experimental)
[-v] Verbose mode.
## Transparent proxy
The latest shadowsocks-libev has provided a *redir* mode. You can configure your Linux-based box or router to proxy all TCP traffic transparently, which is handy if you use an OpenWRT-powered router.
# Create new chain
iptables -t nat -N SHADOWSOCKS
iptables -t mangle -N SHADOWSOCKS
# Ignore your shadowsocks server's addresses
# It's very IMPORTANT, just be careful.
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.
iptables -t nat -A SHADOWSOCKS -d 0.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 10.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 127.0.0.0/8 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 169.254.0.0/16 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 172.16.0.0/12 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 192.168.0.0/16 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 224.0.0.0/4 -j RETURN
iptables -t nat -A SHADOWSOCKS -d 240.0.0.0/4 -j RETURN
# Anything else should be redirected to shadowsocks's local port
iptables -t nat -A SHADOWSOCKS -p tcp -j REDIRECT --to-ports 12345
# Add any UDP rules
ip route add local default dev lo table 100
ip rule add fwmark 1 lookup 100
iptables -t mangle -A SHADOWSOCKS -p udp --dport 53 -j TPROXY --on-port 12345 --tproxy-mark 0x01/0x01
# Apply the rules
iptables -t nat -A PREROUTING -p tcp -j SHADOWSOCKS
iptables -t mangle -A PREROUTING -j SHADOWSOCKS
# Start the shadowsocks-redir
ss-redir -u -c /etc/config/shadowsocks.json -f /var/run/shadowsocks.pid
## Transparent proxy (pure tproxy)
Executing this script on the linux host can proxy all outgoing traffic of this machine (except the traffic sent to the reserved address). Other hosts under the same LAN can also change their default gateway to the ip of this linux host (at the same time change the dns server to 1.1.1.1 or 8.8.8.8, etc.) to proxy their outgoing traffic.
> Of course, the ipv6 proxy is similar, just change `iptables` to `ip6tables`, `ip` to `ip -6`, `127.0.0.1` to `::1`, and other details.
```shell
#!/bin/bash
start_ssredir() {
# please modify MyIP, MyPort, etc.
(ss-redir -s MyIP -p MyPort -m MyMethod -k MyPasswd -b 127.0.0.1 -l 60080 --no-delay -u -T -v </dev/null &>>/var/log/ss-redir.log &)
}
stop_ssredir() {
kill -9 $(pidof ss-redir) &>/dev/null
}
start_iptables() {
##################### SSREDIR #####################
iptables -t mangle -N SSREDIR
# connection-mark -> packet-mark
iptables -t mangle -A SSREDIR -j CONNMARK --restore-mark
iptables -t mangle -A SSREDIR -m mark --mark 0x2333 -j RETURN
# please modify MyIP, MyPort, etc.
# ignore traffic sent to ss-server
iptables -t mangle -A SSREDIR -p tcp -d MyIP --dport MyPort -j RETURN
iptables -t mangle -A SSREDIR -p udp -d MyIP --dport MyPort -j RETURN
# ignore traffic sent to reserved addresses
iptables -t mangle -A SSREDIR -d 0.0.0.0/8 -j RETURN
iptables -t mangle -A SSREDIR -d 10.0.0.0/8 -j RETURN
iptables -t mangle -A SSREDIR -d 100.64.0.0/10 -j RETURN
iptables -t mangle -A SSREDIR -d 127.0.0.0/8 -j RETURN
iptables -t mangle -A SSREDIR -d 169.254.0.0/16 -j RETURN
iptables -t mangle -A SSREDIR -d 172.16.0.0/12 -j RETURN
iptables -t mangle -A SSREDIR -d 192.0.0.0/24 -j RETURN
iptables -t mangle -A SSREDIR -d 192.0.2.0/24 -j RETURN
iptables -t mangle -A SSREDIR -d 192.88.99.0/24 -j RETURN
iptables -t mangle -A SSREDIR -d 192.168.0.0/16 -j RETURN
iptables -t mangle -A SSREDIR -d 198.18.0.0/15 -j RETURN
iptables -t mangle -A SSREDIR -d 198.51.100.0/24 -j RETURN
iptables -t mangle -A SSREDIR -d 203.0.113.0/24 -j RETURN
iptables -t mangle -A SSREDIR -d 224.0.0.0/4 -j RETURN
iptables -t mangle -A SSREDIR -d 240.0.0.0/4 -j RETURN
iptables -t mangle -A SSREDIR -d 255.255.255.255/32 -j RETURN
# mark the first packet of the connection
iptables -t mangle -A SSREDIR -p tcp --syn -j MARK --set-mark 0x2333
iptables -t mangle -A SSREDIR -p udp -m conntrack --ctstate NEW -j MARK --set-mark 0x2333
# packet-mark -> connection-mark
iptables -t mangle -A SSREDIR -j CONNMARK --save-mark
##################### OUTPUT #####################
# proxy the outgoing traffic from this machine
iptables -t mangle -A OUTPUT -p tcp -m addrtype --src-type LOCAL ! --dst-type LOCAL -j SSREDIR
iptables -t mangle -A OUTPUT -p udp -m addrtype --src-type LOCAL ! --dst-type LOCAL -j SSREDIR
##################### PREROUTING #####################
# proxy traffic passing through this machine (other->other)
iptables -t mangle -A PREROUTING -p tcp -m addrtype ! --src-type LOCAL ! --dst-type LOCAL -j SSREDIR
iptables -t mangle -A PREROUTING -p udp -m addrtype ! --src-type LOCAL ! --dst-type LOCAL -j SSREDIR
# hand over the marked package to TPROXY for processing
iptables -t mangle -A PREROUTING -p tcp -m mark --mark 0x2333 -j TPROXY --on-ip 127.0.0.1 --on-port 60080
iptables -t mangle -A PREROUTING -p udp -m mark --mark 0x2333 -j TPROXY --on-ip 127.0.0.1 --on-port 60080
}
stop_iptables() {
##################### PREROUTING #####################
iptables -t mangle -D PREROUTING -p tcp -m mark --mark 0x2333 -j TPROXY --on-ip 127.0.0.1 --on-port 60080 &>/dev/null
iptables -t mangle -D PREROUTING -p udp -m mark --mark 0x2333 -j TPROXY --on-ip 127.0.0.1 --on-port 60080 &>/dev/null
iptables -t mangle -D PREROUTING -p tcp -m addrtype ! --src-type LOCAL ! --dst-type LOCAL -j SSREDIR &>/dev/null
iptables -t mangle -D PREROUTING -p udp -m addrtype ! --src-type LOCAL ! --dst-type LOCAL -j SSREDIR &>/dev/null
##################### OUTPUT #####################
iptables -t mangle -D OUTPUT -p tcp -m addrtype --src-type LOCAL ! --dst-type LOCAL -j SSREDIR &>/dev/null
iptables -t mangle -D OUTPUT -p udp -m addrtype --src-type LOCAL ! --dst-type LOCAL -j SSREDIR &>/dev/null
##################### SSREDIR #####################
iptables -t mangle -F SSREDIR &>/dev/null
iptables -t mangle -X SSREDIR &>/dev/null
}
start_iproute2() {
ip route add local default dev lo table 100
ip rule add fwmark 0x2333 table 100
}
stop_iproute2() {
ip rule del table 100 &>/dev/null
ip route flush table 100 &>/dev/null
}
start_resolvconf() {
# or nameserver 8.8.8.8, etc.
echo "nameserver 1.1.1.1" >/etc/resolv.conf
}
stop_resolvconf() {
echo "nameserver 114.114.114.114" >/etc/resolv.conf
}
start() {
echo "start ..."
start_ssredir
start_iptables
start_iproute2
start_resolvconf
echo "start end"
}
stop() {
echo "stop ..."
stop_resolvconf
stop_iproute2
stop_iptables
stop_ssredir
echo "stop end"
}
restart() {
stop
sleep 1
start
}
main() {
if [ $# -eq 0 ]; then
echo "usage: $0 start|stop|restart ..."
return 1
fi
for funcname in "$@"; do
if [ "$(type -t $funcname)" != 'function' ]; then
echo "'$funcname' not a shell function"
return 1
fi
done
for funcname in "$@"; do
$funcname
done
return 0
}
main "$@"
```
## Security Tips
For any public server, to avoid users accessing localhost of your server, please add `--acl acl/server_block_local.acl` to the command line.
Although shadowsocks-libev can handle thousands of concurrent connections nicely, we still recommend
setting up your server's firewall rules to limit connections from each user:
# Up to 32 connections are enough for normal usage
iptables -A INPUT -p tcp --syn --dport ${SHADOWSOCKS_PORT} -m connlimit --connlimit-above 32 -j REJECT --reject-with tcp-reset
## License
```
Copyright: 2013-2015, Clow Windy <clowwindy42@gmail.com>
2013-2018, Max Lv <max.c.lv@gmail.com>
2014, Linus Yang <linusyang@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/>.
```
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