Websocket connection can't be established from Cloudflare Worker

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Hi, I’m experiencing this issue where web socket connection can be established locally. But when trying this in a deployed Cloudflare Worker, I’ve got the following error:

Error: Uncaught TypeError: Failed to establish the WebSocket connection: expected server to reply with HTTP status code 101 (switching protocols), but received 404 instead.

I receive 404 when using wss & 520 when using ws

It seems like access from Cloudflare is blocked?

3

Nvm, this seems like an issue with Cloudflare 🐛 Bug Report — Runtime APIs `WebSocket` can't connect to remote server when using custom port number · Issue #1751 · cloudflare/workerd · GitHub

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