520 errors and lot ERR in network log

Website, Application, Performance Getting Started
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Hello, on 29th I noticed my server is getting lot 520 errors. Yes I’ve read a lot about it, I understand it’s a catch all bug. So I went into the rabbit hole and:

  • updated SSL with cloudflare (let’s encrypt before)
  • ssl is full strict
  • I checked server logs (woocommerce), disabled all plugins that were updated/installed since 27th - 2 days prior to first errors
  • updated all plugins
  • checked for malware
  • talked with my hosting provider
  • updated to php 8.2
  • checked header sizes (Header: 712 B Content: 7176 B Total: 7888 B)
  • disabled gzip, though was disabled
  • prepared network log export

Most of the times it’s 520 error, but sometimes its 525, rarely. Below is error log. CF is my registrat, I’ve enabled DNSSEC just now and waiting for setup to be finished. Is there else I can do?

error log
error log1920×1829 311 KB

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3

Hello,

Sorry to hear you are having issues with the 520. Error I would grab a HAR file of the issue or a URI that is exhibiting this behavior from your end. If you are able to reproduce the 520 a PCAP can be helpful to see if the origin is resetting the connection which is common for a 520(Troubleshooting Cloudflare 5XX errors · Cloudflare Support docs).

The steps you have taken should help remedy any issues. If you are still having issues please create a ticket following the link below.

So we can check for further logging to pinpoint this issue if it is available on our end.

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