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content/post/c048b27771374b6588b5ff08563e1f3c/index.zh-cn.md
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author = "FlintyLemming"
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title = "自建 Tailscale DERP"
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slug = "57a9a3c008de49f0a1ee810a7a076f4c"
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date = "2022-09-17"
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description = ""
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categories = ["Network", "Linux"]
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tags = ["Tailscale"]
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image = "https://img.mitsea.com/blog/posts/2022/09/%E8%87%AA%E5%BB%BA%20Tailscale%20DERP/title.jpg?x-oss-process=style/ImageCompress"
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## 配置 Go 环境
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以下参考
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[How To Install Go on Ubuntu 20.04 | DigitalOcean](https://www.digitalocean.com/community/tutorials/how-to-install-go-on-ubuntu-20-04)
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1. 在 Go 官网查找并下载最新版
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[Downloads - The Go Programming Language](https://go.dev/dl/)
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2. 解压并放到 `/usr/local` 文件夹中
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```bash
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sudo tar -C /usr/local -xvf go1.19.1.linux-amd64.tar.gz
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```
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3. 配置 shell 环境
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编辑 `.profile` 文件
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```bash
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sudo nano ~/.profile
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```
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在最后一行加上
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```bash
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export PATH=$PATH:/usr/local/go/bin
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```
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刷新设置
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```bash
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source ~/.profile
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```
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执行 `go version` 命令,能看到版本就行
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## 安装 DERP
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执行下面的命令安装
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```bash
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go install tailscale.com/cmd/derper@main
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```
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## 准备 DERP 所需内容(使用 443 端口)
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### 域名
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准备一个子域名,解析到当前服务器
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### SSL 证书
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准备域名对应的 SSL 证书,注意名字必须是 <域名>.crt 和 <域名>.key,放在某个文件夹里
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## 启动 DERP
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```bash
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/root/go/bin/derper -hostname <域名> -certdir <证书存放路径> -certmode manual -verify-clients
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```
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保活的话,可以把这个做成服务或者直接丢到一个 screen 里跑
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## 防止被滥用
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默认情况下,只要别人知道你这个域名,就可以使用你的 DERP 服务器。
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要想不被滥用也很简单,因为我们之前已经在启动的时候添加了 `-verify-clients` flag,所以现在只需要将这台 DERP 服务器也加入到你的 Tailscale 里就行。
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> Photo by [Martin Sanchez](https://unsplash.com/@martinsanchez?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com/s/photos/global?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText)
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