Your home network is like an apartment building: (Overall Metaphor)

  • 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?