# Shadowsocks

[Shadowsocks](https://github.com/shadowsocks)在github上有很多项目，比如`shadowsocks`、`shadowsocks-libev`、`go-shadowsocks2`以及`go-shadowsocks2`等等。其中`shadowsocks`是最初的版本，用python编写，已经很长时间没有维护了，`go-shadowsocks2`是用go语言重写的版本，`shadowsocks-libev`是用C语言重写的版本。

本教程将介绍在CentOS7上安装Shadowsocks服务器，介绍以下几种不同的安装方式

## shadowsocks-libev

### 方法一：yum安装

参考 <https://github.com/shadowsocks/shadowsocks-libev#install-from-repository-1>

该方法亲测有效

#### 添加epel源

```
$ yum -y install epel-release
```

#### 添加shadowsocks-libev的yum源

在`/etc/yum.repos.d/`目录下创建文件`librehat-shadowsocks-epel-7.repo`，内容如下

```
[copr:copr.fedorainfracloud.org:librehat:shadowsocks]
name=Copr repo for shadowsocks owned by librehat
baseurl=https://copr-be.cloud.fedoraproject.org/results/librehat/shadowsocks/epel-7-$basearch/
type=rpm-md
skip_if_unavailable=True
gpgcheck=1
gpgkey=https://copr-be.cloud.fedoraproject.org/results/librehat/shadowsocks/pubkey.gpg
repo_gpgcheck=0
enabled=1
enabled_metadata=1
```

#### 安装

```
$ yum -y install shadowsocks-libev
```

安装成功后，会在`/usr/bin/`目录下生成`ss-server`、`ss-local`等二进制文件；会生成`/usr/lib/systemd/system/shadowsocks-libev.service`文件；以及配置文件`/etc/shadowsocks-libev/config.json`等

查看安装的版本

```
$ yum list installed | grep shadowsocks
shadowsocks-libev.x86_64               3.2.0-2.el7                     @copr:copr.fedorainfracloud.org:librehat:shadowsocks
```

#### 更改配置

修改配置文件`/etc/shadowsocks-libev/config.json`，把`server`从`127.0.0.1`修改为主机实际对外的IP，比如`192.168.2.101`，这样shadowsocks客户端才能连上；其他选项根据实际需求进行修改，配置文件样例如下：

```
{
    "server":"192.168.2.101",
    "server_port":8388,
    "local_port":1080,
    "password":"foobar!",
    "timeout":60,
    "method":"chacha20-ietf-poly1305"
}
```

#### 启动shadowsock服务

```
$ systemctl start shadowsocks-libev
```


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