# 云梯

## VPN服务器

1. 从 <https://my.vultr.com/> 购买一个centos服务器，服务器每个月给1000G的流量包，足够使用了

   **配置VPN服务器**

   ```bash
   # 下载python2.7
   yum install python2
   # 建个软件接
   ln -s /usr/bin/python2.7 /usr/bin/python
   ```

   **安装shadowsocks服务**

   可以从这个博客了解一下什么是shadowsocks <http://www.devtalking.com/articles/shadowsocks-guide/>

   下载地址 <https://pypi.org/project/shadowsocks/>

   ```python
   # 直接使用pip下载
   pip install shadowsocks
   ```

   **使用配置文件启动`shadowsocks`服务**

   配置文件 `/etc/shadowsocks.json`

   ```javascript
   {
       "server":"IP字符串",
       "server_port":8388,
       "local_port":1080,
       "password":"设置一个连接密码",
       "timeout":600,
       "method":"aes-256-cfb",
       "auth": true
   }
   ```

   **启动服务**

   报错的解决办法 <https://blog.csdn.net/weixin_39220714/article/details/86729935>

   将`cleanup`全部替换为`reset`

   ```bash
   # 启动服务
   ssserver -c /etc/shadowsocks.json -d start
   # 关闭服务
   ssserver -c /etc/shadowsocks.json -d stop
   # 重启
   ssserver -c /etc/shadowsocks.json -d restart
   ```

   **客户端连接的时候老是没有反应**防火墙堵了，干脆直接把防火墙关了

   参考 <https://blog.csdn.net/bbwangj/article/details/74502967>

   我的centos8是 **firewall防火墙**

   ```bash
   # 开启
   service firewalld start
   # 重启
   service firewalld restart
   # 关闭
   service firewalld stop
   ```

   查看服务端的运行日志

   ```bash
   less /var/log/shadowsocks.log
   ```

## 客户端配置

下载对应版本的客户端 <https://github.com/shadowsocks/shadowsocks-windows/releases>

安卓版 <https://github.com/shadowsocks/shadowsocks-android>

之后之间进行连接，配置信息和 `shadowsocks.json` 文件一一对应好就行

### 客户端报错

```
2019-11-10 19:48:58] System.Reflection.TargetInvocationException: 操作过程中出现异常，结果无效。  有关异常的详细信息，请查看 InnerException。 ---> System.Net.WebException: 基础连接已经关闭: 发送时发生错误。 ---> System.IO.IOException: 由于远程方已关闭传输流，身份验证失败。
   在 System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)
   在 System.Net.PooledStream.EndWrite(IAsyncResult asyncResult)
   在 System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)
   --- 内部异常堆栈跟踪的结尾 ---
```

### 解决

参考官方说明 <https://github.com/shadowsocks/shadowsocks-windows/wiki/Troubleshooting>

* Sometimes the `Winsock` and `TCP/IP` protocol is corrupted for some reason. Please execute the following command with Administrator privilege in `CMD`. Then reboot./有时候系统的`Winsock`和`TCP/IP`协议栈因未知原因损坏，请以管理员权限在`CMD`中执行以下命令，然后重启：

```
netsh interface ipv4 reset
netsh interface ipv6 reset
netsh winsock reset
```

## 连接时访问慢的原因可能是端口被运营商封闭的原因

登录到运营商那里，打开端口就ok了


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