521 error on Google Cloud Platform VM Instance

Website, Application, Performance Getting Started
1

Hi!

I am working on a website which is installed using Google Cloud on an vm-instance. On the site I’ve running WordPress, and that was working fine until adding Cloudflare to it.

The website is: https://allgoodwedding.com with IP-adress https://35.184.57.145/

Suddenly, I am receiving a 521 error. I’ve read about this error on different topics such as https://community.cloudflare.com/t/error-521-on-google-cloud-platform-vm-instance/90311

However, I am not really sure how to whitelist the IP-addresses of Cloudflare on my vm-instance.
Anyone who has any experience with this? If you have any questions, please ask. Thanks already!

2

Well, the message is quite clear about the issue.

Your server seems to be down → http://sitemeer.com/#https://35.184.57.145

3

Sometimes the most simple errors are to be overlooked. Thanks for this, made a small mistake and everything works fine now.

4

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