Web server is returning an unknown error Error code 520 on www.sixrace.it

What is the name of the domain?

www.sixrace.it

What is the error number?

520

What is the error message?

Web server is returning an unknown error Error code 520 Visit cloudflare.com for more information. 2024-11-29 22:26:00 UTC

What is the issue you’re encountering

Not able to load the website with cf proxy enabled

What steps have you taken to resolve the issue?

Revoke ssl cert, Re issue ssl cert, restart proxy, revise ssl configuration, clear cookies.

What feature, service or problem is this related to?

DNS records

What are the steps to reproduce the issue?

I’m using CF proxy whit this domain at least for the last 4 years with no nmajor problem with this configuration:
F - NGINX - LiteSpeed.
SSL full strict
Edge certificate issued by cf for *.sixrace.it and sixrace.it

Today i’ve upgraded my prestashop installation, so i’ve created in the last month a new.sixrace.it domain, migrated database and file, and today i’ve switched the website renaming www directory to old and new to www.
I’ve update database url, domain, htaccess, ecc.
I’ve made all these step in local BEFORE try in production with no problem.
Going in poduction start the nightmare.
Upgrading ps need to maintain old cookie , there is no workaround here, i cant clear cookies or change cookies key.
BTW:

  1. i got ssl invalid error from chrome web browser where previously i’ve just visited the website
  2. if try to disable strict mode to full mode i got ssl invalid error.
    So i’ve reissued letsencrypt ssl cert and restarted nginx.
    with chrome i’m not able to access website without clearing all website data.
    If i remove cf proxy i’m able to access website with no problem.

Can someone help?

A 520 error occurs when the connection started on the origin web server, but that the request was not completed. The most common reason why this would occur is that either a program, cron job, or resource is taking up more resources than it should causing the server not to be able to respond to all requests properly.

Review the Quick Fix Ideas in this Community Tip for troubleshooting suggestions.

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