Error 521 - Unable to have support

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@guidomix

Error 521

Regarding 521 errors:

Community Tip - Fixing Error 521: Web server is down

Error Try the suggestions in this Community Tip to help you fix Error 521: Web server is down. Background A 521 error happens when we are unable to make a TCP connection to your origin server. Specifically, Cloudflare tried to connect to your origin server on port 80 or 443, but received a connection refused error. This is often caused by security or firewall software and happens if the origin server has directly refused Cloudflare’s proxy request. [Banner in tip catalog] Quick Fix Ideas …

Kindly, check your SSL settings too.
Do you have an valid SSL certificate at your origin/host for your domain and your sub-domains? Also, which SSL mode have you got enabled (Full SSL, …)?
Did you have had an SSL certificate before moving your domain/website to Cloudflare?

Deprecated - SSL/TLS app Settings

This tutorial is deprecated in favour of Get started with SSL/TLS · Cloudflare SSL/TLS docs

Archive

SSL/TLS Configuration Video: This tutorial covers basic settings in the SSL/TLS app of the Cloudflare Dashboard, including SSL Mode [Off/Flexible/Full/Full (Strict)], Cloudflare Origin Certificates, ‘Always Use HTTPS’ and ‘Automatic HTTPS Rewrites’. The settings covered here can all be found by visiting <a href="http://Cloudflare.com">Cloudflare.com</a>, logging in, selectin…

Kindly, check the steps from below article to make sure you have the right SSL setup:

Deprecated - Step 2: Setting up SSL with Cloudflare

This tutorial is deprecated in favour of Get started with SSL/TLS · Cloudflare SSL/TLS docs

Archive

This tutorial covers getting SSL working with Cloudflare in various different scenarios. This assumes you already have your website set up on Cloudflare with all your DNS records set to , if not - please visit <a href="https://community.cloudflare.com/t/64309">Step 1</a>. Do you want the website to use HTTPS? Yes Do you already have a valid SSL certificate installed…

Deprecated - Troubleshooting SSL/TLS issues

This tutorial is deprecated in favour of Troubleshooting · Cloudflare SSL/TLS docs

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This tutorial post covers the steps you should take if you have enabled Cloudflare, but HTTPS is not working on the site. If your main domain is secure, but a subdomain is not, please see <a href="https://community.cloudflare.com/t/ssl-tls-not-working-on-subdomain/75181.">https://community.cloudflare.com/t/ssl-tls-not-working-on-subdomain/75181.</a> 1. Check that the DNS record is se…

@guidomix

But where is the webserver???

May I ask who is your hosting provider?
Have you tried contacting them to make sure Cloudflare is allowed to connect to their server/host and not being blocked?

@guidomix

The hosting is on cloudflare

I am afraid but this is incorrect statement as Cloudflare is not a hosting provider company.

@guidomix

TCP connection to the web server could not be established

May I ask on which port is you app working?
Is the port compatible with Cloudflare ones from below article?
https://support.cloudflare.com/hc/en-us/articles/200169156-Which-ports-will-Cloudflare-work-with-

@guidomix

This typically happens when our requests to the origin (your webserver) get blocked

May I ask have you tried the steps from the below article?:
https://support.cloudflare.com/hc/en-us/articles/201897700-Allowing-Cloudflare-IP-addresses

Cloudflare IP address list can be found here:

IP Ranges

@guidomix

522 errors

Regarding 522 errors:

Community Tip - Fixing Error 522: Connection timed out

Error Try the suggestions in this Community Tip to help you fix Error 522 “ERR CONNECTION TIMED OUT” in Google Chrome or “The connection has timed out” in Firefox. Background A 522 error happens when a TCP connection to the web server could not be established. This typically happens when Cloudflare requests to the origin (your webserver) get blocked. When this happens, you’ll see “ERR_CONNECTION_TIMED_OUT”. [image] Quick Fix Ideas Make sure that you’re not blocking Cloudflare IPs in .hta…