Can't reach my website, 521 error

What is the name of the domain?

chen1110.xyz

What is the error number?

521

What is the issue you’re encountering

Can’t reach my web server

Screenshot of the error

I would like to notice that I am using cloudflare proxy. whenever I remove the proxy I can reach my website server.
the ssl mode is full strict and I have certificate from LetsEncrypt.
I followed this guy on youtube.

Can you change the record to DNS-Only for a moment?

Yea I am doing it right now I will leave it like that for 30 minutes. Thanks

Changed it.

It’s not working in DNS-Only either. You can probably only connect from your local network. Does it work if you try from mobile for example (Wifi off)?

For some reason right now it’s not working at all
I will respond this topic whenever it’s working again.
Thanks for now

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so I fixed that and now chen1110.xyz is reachable. also removed the dns proxy.

Not for me. Did you try to open it from your mobile network?

Yea its not working on my mobile either, from PC it’s working fine… let me check this out

There are a few options:

  1. You haven’t set up port forwarding on your router
  2. Your ISP is blocking incoming traffic

IIf you have set up port forwarding and 2) is the actual problem, you could bypass this by using a Cloudflare tunnel. Tunnels create a connection from your server to Cloudflare, and they aren’t too difficult to set up.

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