游戏福音：kcptun+udp2raw解决udp干扰/QoS

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自从上了 kcptun，玩这种美服游戏就感觉在玩国服，几乎感觉不到什么延时，然而好景不长。。延时的问题算是解决了，但新的问题粗来了。。

最近这几天经常会出现 kcptun 断流的问题，具体表现是 kcptun 这边不报任何错误，但经过 kcptun 的流量就是无法到达对端，基本上只要断流了就要等个几分钟才能恢复（或者根本恢复不了，就像黑名单了一样）。

最直观的是在 sstap 上测试连接，走了 kcptun 的流量全部连接都被服务器放弃：

如果这时候直接连接 ss 的话是没有问题的，所以我初步怀疑是电信运营商 QoS 了。

后续我将宽带 IP 重新拨号，只要换一个 IP 就能立马连上，所以基本可以断定是电信这边搞的鬼。

我寻思我就每天拿来玩下游戏，一天下来用的流量也不超过 2GB，你这样搞，简直没有人性啊！TM 的一个月 125 的宽带这点 UDP 流量都不让跑？

没办法，kcptun 这个东西我必须要用，所以只能在 kcptun 前面再套一个 udp2raw 解决运营商的 QoS 问题了。

其实说实话，这样配置起来的话我自己都觉得有点麻烦了，这套那套的。。端口用了一堆，软件也开了一堆。。对于新手来说肯定是极其不友好，所以我建议萌新如果怕麻烦，直接花钱买现成的服务吧。。。（不过买的肯定没这样配置的好用）

首先要准备一堆软件：

<span class="pln">https</span><span class="pun">:</span><span class="com">//github.com/xtaci/kcptun/releases # 服务端和客户端都要下载</span><span class="pln">
https</span><span class="pun">:</span><span class="com">//github.com/dfdragon/kcptun_gclient/releases # 客户端下载</span><span class="pln">
https</span><span class="pun">:</span><span class="com">//github.com/wangyu-/udp2raw-tunnel/releases # 服务端下载</span><span class="pln">
https</span><span class="pun">:</span><span class="com">//github.com/wangyu-/udp2raw-multiplatform/releases # 客户端下载</span><span class="pln">
https</span><span class="pun">:</span><span class="com">//github.com/wangyu-/tinyPortMapper/releases # 客户端下载</span><span class="pln">
https</span><span class="pun">:</span><span class="com">//github.com/mayunbaba2/SSTap-beta-setup # 客户端下载</span>

以下步骤在 Debian10 上完成。其他系统除了 supervisor 的配置文件路径有点变化外基本也一样。

安装 ss 和一些工具：

<span class="pln">apt </span><span class="pun">-</span><span class="pln">y update
apt </span><span class="pun">-</span><span class="pln">y install shadowsocks</span><span class="pun">-</span><span class="pln">libev supervisor wget nano</span>

下载 kcptun：

<span class="pln">mkdir </span><span class="pun">-</span><span class="pln">p </span><span class="pun">/</span><span class="pln">opt</span><span class="pun">/</span><span class="pln">kcptun </span><span class="pun">&&</span><span class="pln"> cd </span><span class="pun">/</span><span class="pln">opt</span><span class="pun">/</span><span class="pln">kcptun
wget https</span><span class="pun">:</span><span class="com">//github.com/xtaci/kcptun/releases/download/v20190924/kcptun-linux-amd64-20190924.tar.gz</span><span class="pln">
tar </span><span class="pun">-</span><span class="pln">xzvf kcptun</span><span class="pun">-</span><span class="pln">linux</span><span class="pun">-</span><span class="pln">amd64</span><span class="pun">-</span><span class="lit">20190924.tar</span><span class="pun">.</span><span class="pln">gz
chmod </span><span class="pun">+</span><span class="pln">x server_linux_amd64</span>

下载 udp2raw：

<span class="pln">mkdir </span><span class="pun">-</span><span class="pln">p </span><span class="pun">/</span><span class="pln">opt</span><span class="pun">/</span><span class="pln">udp2raw </span><span class="pun">&&</span><span class="pln"> cd </span><span class="pun">/</span><span class="pln">opt</span><span class="pun">/</span><span class="pln">udp2raw
wget https</span><span class="pun">:</span><span class="com">//github.com/wangyu-/udp2raw-tunnel/releases/download/20190716.test.0/udp2raw_binaries.tar.gz</span><span class="pln">
tar </span><span class="pun">-</span><span class="pln">xzvf udp2raw_binaries</span><span class="pun">.</span><span class="pln">tar</span><span class="pun">.</span><span class="pln">gz
chmod </span><span class="pun">+</span><span class="pln">x udp2raw_amd64</span>

编辑 ss 的配置文件：

<span class="pln">nano </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">shadowsocks</span><span class="pun">-</span><span class="pln">libev</span><span class="pun">/</span><span class="pln">config</span><span class="pun">.</span><span class="pln">json</span>

修改为：

<span class="pun">{</span>
    <span class="str">"server"</span><span class="pun">:</span> <span class="str">"0.0.0.0"</span><span class="pun">,</span>
    <span class="str">"mode"</span><span class="pun">:</span><span class="str">"tcp_and_udp"</span><span class="pun">,</span>
    <span class="str">"server_port"</span><span class="pun">:</span><span class="lit">12315</span><span class="pun">,</span>
    <span class="str">"local_port"</span><span class="pun">:</span><span class="lit">1080</span><span class="pun">,</span>
    <span class="str">"password"</span><span class="pun">:</span><span class="str">"设置你的 ss 密码"</span><span class="pun">,</span>
    <span class="str">"timeout"</span><span class="pun">:</span><span class="lit">60</span><span class="pun">,</span>
    <span class="str">"method"</span><span class="pun">:</span><span class="str">"chacha20-ietf-poly1305"</span>
<span class="pun">}</span>

重启 ss 以及设置 ss 开机自启：

<span class="pln">systemctl restart shadowsocks</span><span class="pun">-</span><span class="pln">libev
systemctl enable shadowsocks</span><span class="pun">-</span><span class="pln">libev</span>

新建 kcptun 配置文件：

<span class="pln">nano </span><span class="pun">/</span><span class="pln">opt</span><span class="pun">/</span><span class="pln">kcptun</span><span class="pun">/</span><span class="pln">server</span><span class="pun">-</span><span class="pln">config</span><span class="pun">.</span><span class="pln">json</span>

写入如下配置（MTU 设置为 1300 或者更小）：

<span class="pun">{</span>
<span class="str">"listen"</span><span class="pun">:</span> <span class="str">":30000"</span><span class="pun">,</span>
<span class="str">"target"</span><span class="pun">:</span> <span class="str">"127.0.0.1:12315"</span><span class="pun">,</span>
<span class="str">"key"</span><span class="pun">:</span> <span class="str">"设置一个密码"</span><span class="pun">,</span>
<span class="str">"crypt"</span><span class="pun">:</span> <span class="str">"salsa20"</span><span class="pun">,</span>
<span class="str">"mode"</span><span class="pun">:</span> <span class="str">"fast3"</span><span class="pun">,</span>
<span class="str">"mtu"</span><span class="pun">:</span> <span class="lit">1300</span><span class="pun">,</span>
<span class="str">"sndwnd"</span><span class="pun">:</span> <span class="lit">1024</span><span class="pun">,</span>
<span class="str">"rcvwnd"</span><span class="pun">:</span> <span class="lit">1024</span><span class="pun">,</span>
<span class="str">"datashard"</span><span class="pun">:</span> <span class="lit">2</span><span class="pun">,</span>
<span class="str">"parityshard"</span><span class="pun">:</span> <span class="lit">2</span><span class="pun">,</span>
<span class="str">"dscp"</span><span class="pun">:</span> <span class="lit">46</span><span class="pun">,</span>
<span class="str">"nocomp"</span><span class="pun">:</span> <span class="kwd">true</span>
<span class="pun">}</span>

注：这套是游戏加速的配置，如果是看 Youtube 视频等大流量应用，需要把 datashard 以及 parityshard 适当增大。

新建一个 kcptun 的 supervisor 配置文件：

<span class="pln">nano </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">supervisor</span><span class="pun">/</span><span class="pln">conf</span><span class="pun">.</span><span class="pln">d</span><span class="pun">/</span><span class="pln">kcptun</span><span class="pun">.</span><span class="pln">conf</span>

写入：

<span class="pun">[</span><span class="pln">program</span><span class="pun">:</span><span class="pln">kcptun</span><span class="pun">]</span><span class="pln">
priority</span><span class="pun">=</span><span class="lit">1</span><span class="pln">
directory</span><span class="pun">=</span><span class="str">/opt/</span><span class="pln">kcptun
command</span><span class="pun">=</span><span class="str">/opt/</span><span class="pln">kcptun</span><span class="pun">/</span><span class="pln">server_linux_amd64 </span><span class="pun">-</span><span class="pln">c </span><span class="pun">/</span><span class="pln">opt</span><span class="pun">/</span><span class="pln">kcptun</span><span class="pun">/</span><span class="pln">server</span><span class="pun">-</span><span class="pln">config</span><span class="pun">.</span><span class="pln">json
autostart</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
autorestart</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
redirect_stderr</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
stdout_logfile</span><span class="pun">=</span><span class="str">/var/</span><span class="pln">log</span><span class="pun">/</span><span class="pln">supervisor</span><span class="pun">/</span><span class="pln">kcptun</span><span class="pun">.</span><span class="pln">log</span>

再新建一个 udp2raw 的 supervisor 配置文件：

<span class="pln">nano </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">supervisor</span><span class="pun">/</span><span class="pln">conf</span><span class="pun">.</span><span class="pln">d</span><span class="pun">/</span><span class="pln">udp2raw</span><span class="pun">.</span><span class="pln">conf</span>

写入如下配置：

<span class="pun">[</span><span class="pln">program</span><span class="pun">:</span><span class="pln">udp2raw</span><span class="pun">]</span><span class="pln">
user</span><span class="pun">=</span><span class="pln">root
priority</span><span class="pun">=</span><span class="lit">1</span><span class="pln">
directory</span><span class="pun">=</span><span class="str">/opt/</span><span class="pln">udp2raw
command</span><span class="pun">=</span><span class="str">/opt/</span><span class="pln">udp2raw</span><span class="pun">/</span><span class="pln">udp2raw_amd64 </span><span class="pun">-</span><span class="pln">s </span><span class="pun">-</span><span class="pln">l </span><span class="lit">0.0</span><span class="pun">.</span><span class="lit">0.0</span><span class="pun">:</span><span class="lit">30001</span> <span class="pun">-</span><span class="pln">r </span><span class="lit">127.0</span><span class="pun">.</span><span class="lit">0.1</span><span class="pun">:</span><span class="lit">30000</span> <span class="pun">--</span><span class="pln">raw</span><span class="pun">-</span><span class="pln">mode faketcp </span><span class="pun">-</span><span class="pln">a </span><span class="pun">-</span><span class="pln">k </span><span class="str">"设置一个你的密码"</span><span class="pln">
autostart</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
autorestart</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
redirect_stderr</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
stdout_logfile</span><span class="pun">=</span><span class="str">/var/</span><span class="pln">log</span><span class="pun">/</span><span class="pln">supervisor</span><span class="pun">/</span><span class="pln">udp2raw</span><span class="pun">.</span><span class="pln">log</span>

更新 supervisor 配置/开机自启：

<span class="pln">supervisorctl update
systemctl enable supervisor</span>

服务端这边的配置就完成了，接下来是客户端的。

首先用管理员权限开 2 个 powershell，进入到软件的根目录：

<span class="pln">cd C</span><span class="pun">:</span><span class="pln">\Users\LALA\Desktop\udp</span>

第一个 powershell 运行 tinyPortMapper 用来转发 UDP 流量：

<span class="pun">.</span><span class="pln">\tinymapper_wepoll</span><span class="pun">.</span><span class="pln">exe </span><span class="pun">-</span><span class="pln">l </span><span class="lit">0.0</span><span class="pun">.</span><span class="lit">0.0</span><span class="pun">:</span><span class="lit">9527</span> <span class="pun">-</span><span class="pln">r VPS</span><span class="pun">公网</span><span class="pln">IP</span><span class="pun">:</span><span class="lit">12315</span> <span class="pun">-</span><span class="pln">u</span>

这步的作用仅仅只是为了让 SSTap 能够测试通过 UDP 转发，让其能够可以连接代理服务器，对于使用 TCP 协议进行连接的游戏而言这个操作没有实际意义。

第二个 powershell 运行 udp2raw 的 windows 客户端：

<span class="pun">.</span><span class="pln">\udp2raw_mp_nolibnet</span><span class="pun">.</span><span class="pln">exe </span><span class="pun">-</span><span class="pln">c </span><span class="pun">-</span><span class="pln">r VPS</span><span class="pun">公网</span><span class="pln">IP</span><span class="pun">:</span><span class="lit">30001</span> <span class="pun">-</span><span class="pln">l </span><span class="lit">0.0</span><span class="pun">.</span><span class="lit">0.0</span><span class="pun">:</span><span class="lit">5000</span> <span class="pun">--</span><span class="pln">raw</span><span class="pun">-</span><span class="pln">mode easyfaketcp </span><span class="pun">-</span><span class="pln">k </span><span class="str">"对应服务端上的 udp2raw 密码"</span>

打开 KCP 客户端配置管理工具，新建一个客户端，按照下图配置：

传输模式和服务端上的配置对应这里选择 fast3：

现在打开 SSTap 添加一个 ss 代理，配置如下：

最后点击 SSTap 的齿轮按钮，打开附加路由管理，在里面添加上你的 VPS 公网 IP，动作选择直连：

没问题的话现在连上应该就 OK 了。

一点后续补充：

在本地每次都要开两个 powershell 感觉不优雅？这里其实可以用 winSW 把这两个命令行工具创建成 windows 服务，这样就能开机自启而且还不需要 powershell 了，具体的 winSW 用法，可以看这里，我实在没时间码字了，告辞：

https://github.com/kohsuke/winsw/blob/master/doc/installation.md