====== 設定 Cloudflare Tunnel 提供對外網站服務 ======
===== 架構說明 =====
==== 原本架構 ====
<mermaid>
flowchart LR
    A[User Browser] --> B["Cloudflare Proxy<br/>(CDN)"]
    B --> C[Firewall]
    C --> D["Nginx Proxy Manager<br/>(Reverse Proxy)"]
    D --> E[WebServer 1]
    D --> F[WebServer 2]
    D --> G[WebServer 3]
    D --> H[...]
    D --> I[WebServer n]
</mermaid>
    * 這架構需要 Firewall 上面有固定 IP , 並設定 Port Forwarding 到 Reverse Proxy 主機上
    * 在 Reverse Proxy 上面設定每個 WebServer 的 Proxy Forward 網址與 SSL 憑證

==== Cloudflare Tunnel 架構 ====
<mermaid>
flowchart LR
    A[User Browser] --> B["Cloudflare Network<br/>Tunnels Service<br/>(CDN + Reverse Proxy)"]
    
    subgraph D [Cloudflared Connectors]
        D1["Cloudflared<br/>(Connector A)"]
        D2["Cloudflared<br/>(Connector B)"]
        D3["Cloudflared<br/>(Connector C)"]
        
        %% 強制垂直排列
        D1 ~~~ D2
        D2 ~~~ D3
    end
    
    D -->|通過| C[Firewall]
    C -->|主動連接| B
    
    D --> E[WebServer 1]
    D --> F[WebServer 2]
    D --> G[WebServer 3]
    D --> H[...]
    D --> I[WebServer n]
</mermaid>
    * 這架構不需要 Firewall 上面有固定 IP , 也不用設定 Port Forwarding 
    * 只需要在 Cloudflare Tunnels 設定網站對應, 會自動提供 SSL 憑證

===== 設定方式 =====
==== 1. 建立 Cloudflare Tunnel ====
  * https://one.dash.cloudflare.com/ -> Networks -> Tunnels -> Create a tunnel -> Cloudflared \\ {{:tech:螢幕擷取畫面_2025-04-03_185930.png|}}

==== 2. 選擇 Cloudflared 安裝環境 ====
  * 選 Docker -> 複製 docker cli 連結 \\ {{:tech:螢幕擷取畫面_2025-04-03_190417.png|}}
  * 將連結的 token 取出
  * 改用 docker compose 方式進行 Cloudflared 部署 <cli>
wget https://raw.githubusercontent.com/tryweb/docker-compose/refs/heads/main/cloudflared/docker-compose.yml
wget https://raw.githubusercontent.com/tryweb/docker-compose/refs/heads/main/cloudflared/.env.example
</cli>
  * {{repo>https://raw.githubusercontent.com/tryweb/docker-compose/refs/heads/main/cloudflared/docker-compose.yml | docker-compose.yml}}
  * {{repo>https://raw.githubusercontent.com/tryweb/docker-compose/refs/heads/main/cloudflared/.env.example | .env}}
  * 將 .env.example 改名為 .env 並將 token 修改成剛剛 docker cli 取出的值
  * 啟動 docker compose <cli>
docker compose pull
docker compose up -d
docker compose logs -f
</cli>

==== 3. 建立多台 Cloudflared 環境 ====
  * 因為 Cloudflared 如果異常, 整體網路就無法正常運作, 所以可以建立多台來支援, 也可以分攤流量
  * 但是在同一個 Cloudflare Tunnel 的多台 Cloudflared , 必須在相同網段才能合理運作, Exp. Cloudflared A : 192.168.11.4/24 , Cloudflared B : 192.168.11.7/24 , Cloudflared C : 192.168.11.9/24
  * 安裝程序如同上一步驟, Token 都相同

==== 4. 確認 Cloudflare Tunnel 狀態 ====
  * Networks -> Tunnels -> <Tunnel 名稱> -> View all connectors \\ {{:tech:螢幕擷取畫面_2025-04-03_192225.png|}} \\ {{:tech:螢幕擷取畫面_2025-04-03_192321.png|}}
  * 看到安裝的三個 Cloudflared 都正常出現

==== 5. 設定網站對應 ====
  * 這步驟類似 Nginx Proxy Manager(Reverse Proxy)設定網站對應
  * Networks -> Tunnels -> <Tunnel 名稱> -> Edit -> Public Hostname -> Add a public hostname \\ {{:tech:螢幕擷取畫面_2025-04-03_192725.png|}} \\ {{:tech:螢幕擷取畫面_2025-04-03_192819.png|}}
  * 新增一個網站 Exp. www.ichiayi.com -> http://192.168.11.233 \\ {{:tech:螢幕擷取畫面_2025-04-03_193527.png|}}

<note important>
  - 新增一個網站會在 Cloudflare 該網域的 DNS 建立一筆 CNAME 紀錄, 如果 DNS 已經有一筆 A 或衝突的紀錄, 就會新增失敗, 需要回到 DNS 管理將衝突的紀錄先刪除
  - 要先到 Cloudflared 內驗證要 Forward 的網址 Exp. http://192.168.11.233 是否可以正常存取
  - 如果新增成功, 可以查看網站的紀錄 Exp. access.log 可以看到流量會由三台 Cloudflared 隨機進入 <cli>
:
192.168.11.4 - - [03/Apr/2025:19:25:24 +0800] "GET / HTTP/1.1" 200 36257 "-" "check_http/v (monitoring-plugins 2.4.0)"
192.168.11.4 - - [03/Apr/2025:19:30:23 +0800] "GET / HTTP/1.1" 200 36257 "-" "check_http/v (monitoring-plugins 2.4.0)"
192.168.11.9 - - [03/Apr/2025:19:35:18 +0800] "GET /modules/tadnews/pda.php?op=news&nsn=13&ncsn=5 HTTP/1.1" 200 2705 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)"
192.168.11.7 - - [03/Apr/2025:19:35:24 +0800] "GET / HTTP/1.1" 200 36257 "-" "check_http/v (monitoring-plugins 2.4.0)"
192.168.11.4 - - [03/Apr/2025:19:40:25 +0800] "GET / HTTP/1.1" 200 36257 "-" "check_http/v (monitoring-plugins 2.4.0)"
192.168.11.9 - - [03/Apr/2025:19:43:57 +0800] "GET / HTTP/1.1" 200 36259 "-" "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36"
192.168.11.4 - - [03/Apr/2025:19:43:58 +0800] "GET / HTTP/1.1" 200 36259 "-" "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36"
192.168.11.9 - - [03/Apr/2025:19:44:01 +0800] "GET / HTTP/1.1" 200 36259 "-" "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36"
192.168.11.4 - - [03/Apr/2025:19:44:16 +0800] "GET / HTTP/1.1" 200 36259 "-" "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36"
192.168.11.4 - - [03/Apr/2025:19:44:19 +0800] "GET / HTTP/1.1" 200 36259 "-" "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36"
192.168.11.4 - - [03/Apr/2025:19:44:31 +0800] "GET /modules/tadnews/page.php?nsn=86 HTTP/1.1" 200 25365 "-" "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36"
192.168.11.7 - - [03/Apr/2025:19:44:32 +0800] "GET /modules/tadnews/css/module.css HTTP/1.1" 200 4967 "https://lin.ichiayi.com/modules/tadnews/page.php?nsn=86" "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36"
192.168.11.4 - - [03/Apr/2025:19:44:32 +0800] "GET /modules/tadtools/css/iconize.css HTTP/1.1" 200 6483 "https://lin.ichiayi.com/modules/tadnews/page.php?nsn=86" "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Mobile Safari/537.36"
:
</cli>
</note>

===== 參考網址 =====
  * https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/

{{tag>proxy nginx tunnel}}