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129 lines
3.3 KiB
Markdown
129 lines
3.3 KiB
Markdown
---
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title: VPS · 配置 Cloudflare 的免费 SSL 证书
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created: 2022-06-12
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summary: 关于如何为多个域名配置SSL证书的操作笔记
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tags:
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- Nginx
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- VPS
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---
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声明：我不知道这样安不安全哈，It just works，个人笔记，操作有风险
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参考：[申请 CloudFlare 免费 SSL 证书并应用到 nginx – 65536.io | 自娱自乐](https://65536.io/2020/03/607.html)
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先设置加密方式为`完全` ，否则之后可能会出现 526 错误
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## 1. 创建证书
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首先将主域名绑定到 Cloudflare，然后在`SSL/TLS` 下的源服务器证书处，点击`创建证书`
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然后选择私钥和 CSR 生成方式，以及证书的有效期（也可以不改），点击`创建`
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将下面的证书和私钥暂时复制到某个安全的地方，点击确定
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## 2. 密钥上传到 VPS
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连接 VPS 之后，创建一个文件夹存入密钥，我将其存到`/etc/nginx/cert/` 路径下
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```bash
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sudo mkdir /etc/nginx/cert && cd /etc/nginx/cert
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```
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写入证书,粘贴入刚刚保存的`证书` 栏里面的内容
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```bash
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sudo nano public.pem
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```
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修改权限
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```bash
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sudo chmod 644 public.pem
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```
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写入私钥，粘贴入刚刚保存的`私钥` 栏里面的内容
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```bash
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sudo nano private.key
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```
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修改权限
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```bash
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sudo chmod 600 private.key
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```
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## 3. 修改 Nginx 配置
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参考：[How to Redirect HTTP to HTTPS in Nginx](https://phoenixnap.com/kb/redirect-http-to-https-nginx)
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如果有用防火墙，请先打开 80 端口和 443 端口，不然可能会像我一样，卡在一个毫无意义的 522 Error 上 ^ ^
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```bash
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sudo ufw allow 80
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sudo ufw allow 443
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```
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打开 Nginx 配置
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```bash
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sudo nano /etc/nginx/nginx.conf
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```
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在 http 块里面配置一个默认 server，将 http 重定向到 https
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```bash
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# 默认server
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server {
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listen 80 default_server;
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server_name _;
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return 301 https://$host$request_uri;
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}
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# ssl配置
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server {
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listen 443 ssl default_server;
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server_name *.example1.com;
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ssl_certificate /etc/nginx/cert/public.pem;
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ssl_certificate_key /etc/nginx/cert/private.key;
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}
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# 如果有多个域名，可以这样配置，证书也要按之前的添加一下
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server {
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listen 443 ssl;
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server_name *.example2.com;
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ssl_certificate /etc/nginx/cert/example2/public.pem;
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ssl_certificate_key /etc/nginx/cert/example2/private.key;
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}
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```
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然后`sudo nginx -t` 测试一下，没有问题的话就可以 Nginx 了：
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```bash
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sudo systemctl reload nginx
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```
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之后如果有域名要配置 ssl ，如 example.conf 中，可以直接将 `listen 80` 改为`listen 443 ssl`
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我常用的一个反代配置:
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```conf
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server {
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listen 443 ssl;
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server_name 域名
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location / {
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proxy_pass http://127.0.0.1:反代端口;
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proxy_set_header HOST $host;
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proxy_set_header X-Forwarded-Proto $scheme;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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}
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}
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```
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