Title: QUIC.cloud ERROR 520 Problem
Last modified: October 22, 2022

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# QUIC.cloud ERROR 520 Problem

 *  Resolved [mc1969](https://wordpress.org/support/users/mc1969/)
 * (@mc1969)
 * [3 years, 5 months ago](https://wordpress.org/support/topic/quic-cloud-error-520-problem/)
 * I have the LiteSpeed Cache plugin installed on a site I am building at [http://www.fabulous-food.com.au](http://www.fabulous-food.com.au).
   All the main plugin functions, including the QUIC.cloud CDN, are enabled.
 * The site is running on PHP 8.2, and the WordPress, theme and plugin versions 
   are the latest available.
 * Site speed testing results are impressive, but I keep getting intermittent “ERROR
   520” messages when I am working on the back end of the site.
 * The QUIC.cloud website troubleshooting section suggests that a firewall at the
   origin server may be blocking the connection, and that the hosting provider be
   requested to add the QUIC.cloud IPs to the firewall allowlist.
 * My hosting provider assures me that this is not the case.
 * I have searched the forum and It seems that I am not the first person to experience
   this problem. However, I can’t seem to find any definitive reason or solution.
 * I would be grateful for any assistance or comments.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fquic-cloud-error-520-problem%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [serpentdriver](https://wordpress.org/support/users/serpentdriver/)
 * (@serpentdriver)
 * [3 years, 5 months ago](https://wordpress.org/support/topic/quic-cloud-error-520-problem/#post-16125876)
 * Did you already read this?
    [https://quic.cloud/docs/troubleshooting/http-error-response-codes/](https://quic.cloud/docs/troubleshooting/http-error-response-codes/)
 * If this doesn’t help you can check your host for any network issues. This can
   easily be done with WinMTR, where you can check the traffic route.
    [https://sourceforge.net/projects/winmtr/](https://sourceforge.net/projects/winmtr/)
 *  Thread Starter [mc1969](https://wordpress.org/support/users/mc1969/)
 * (@mc1969)
 * [3 years, 5 months ago](https://wordpress.org/support/topic/quic-cloud-error-520-problem/#post-16130490)
 * Thanks for your quick response and suggestions.
 * However, after consulting my hosting provider, I am pretty sure the problem is
   not caused by them.
 * I can’t be bothered spending any more time on the issue, so I have disabled the
   QUIC.cloud CDN.
 * I am still getting very impressive scores on Pingdom, GMetrix and ByteCheck, 
   so the LiteSpeed Cache plugin seems to be doing it’s job, even without the CDN.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘QUIC.cloud ERROR 520 Problem’ is closed to new replies.

 * ![](https://ps.w.org/litespeed-cache/assets/icon-256x256.png?rev=2554181)
 * [LiteSpeed Cache](https://wordpress.org/plugins/litespeed-cache/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/litespeed-cache/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/litespeed-cache/)
 * [Active Topics](https://wordpress.org/support/plugin/litespeed-cache/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/litespeed-cache/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/litespeed-cache/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [mc1969](https://wordpress.org/support/users/mc1969/)
 * Last activity: [3 years, 5 months ago](https://wordpress.org/support/topic/quic-cloud-error-520-problem/#post-16130490)
 * Status: resolved