整体比喻：
你家网络就像一栋楼：
- 光猫：是一楼门卫，所有出门、进门的东西都要通过他。
- Cudy 路由器：住在你房间的“万能小助手”，你只跟它打交道。
- 你自己的设备：手机、电脑，像你本人，天天找助手帮忙上网。
- SSR 代理节点：是你的小助手找的“国外翻译朋友”。
场景：你想去 Google 看网页，但 Google 在国外，门卫不让你直接出国。
【出门过程：你想上 Google】
- 你对小助手（Cudy）说：“帮我打开 Google 网页。”
- 小助手一听，知道你不能直接出国。
- 他马上联系他国外的翻译朋友（代理节点），说：
- “我家主人想看看 Google 网页，你能帮忙问一下吗？”
- 小助手通过门卫（光猫）把这封信寄出去了。
- 门卫看到是你助手寄出的信，没问题，放行！
【回来过程：Google 的网页结果来了】
- 翻译朋友（国外代理）帮你访问了 Google，拿到了网页。
- 然后翻译朋友把网页打包 → 寄回你家 → 交给门卫（光猫）。
- 门卫一看：
- “哦，这是之前 Cudy（你助手）发的信的回信，送给他。”
- 于是这封信安全地交到了你助手手上。
- 你助手（Cudy）接到信后，把网页内容翻译成你能看的样子，然后转交给你（电脑/手机）。
- 你打开手机浏览器一看，Google 正常打开了！
总结一句话：
整个过程，门卫（光猫）根本不知道你是在看 Google，只知道你助手（Cudy）在收发信件，一切都合法、自然。
你没有直接出国；是你助手在国外找朋友帮你打探消息；回信自然能安全送回，不会被拦；你自己什么都不用设置，看起来就像“直接打开了 Google”。
是不是一下就明白了？
Overall Metaphor:
- Your home network is like an apartment building:
- The optical modem is the gatekeeper on the first floor—everything coming in or going out must pass through them.
- The Cudy router is your “all-purpose personal assistant” living in your room—you only deal with it.
- Your own devices (phone, computer) are like you, always asking your assistant for help getting online.
- The SSR proxy node is the “foreign translator friend” that your assistant contacts when needed.
Scenario: You want to visit Google, but Google is overseas and the gatekeeper doesn’t allow you to leave the country directly.
[Going Out: You Want to Access Google]
- You tell your assistant (Cudy): “Please open the Google website for me.”
- Your assistant knows you can’t go abroad directly.
- So it contacts its foreign translator friend (proxy node), saying:
- “My master wants to view the Google site—can you check it out for them?”
- The assistant sends this request through the gatekeeper (optical modem).
- The gatekeeper sees that the assistant sent the message—no problem, it lets it pass.
[Coming Back: Google’s Response Returns]
- The translator friend visits Google for you and retrieves the webpage.
- Then they package the page → send it back to your home → hand it to the gatekeeper.
- The gatekeeper checks:
- “Oh, this is a reply to the message Cudy (your assistant) sent earlier. Let it through.”
- So the message safely reaches your assistant.
- Your assistant (Cudy) receives it, translates it into a format you can understand, and hands it to you (your device).
- You open your browser—and voilà, Google loads just fine!
In Summary:
Throughout the entire process, the gatekeeper (optical modem) has no idea you’re viewing Google. All it sees is your assistant (Cudy) sending and receiving messages. Everything appears legal and normal.
- You didn’t travel abroad yourself;
- Your assistant contacted a friend overseas for you;
- The reply was naturally allowed back in;
- You didn’t need to configure anything yourself—it looks like you just opened Google directly.
Now it all makes sense, doesn’t it?