Server Down and web down

[prensazoomtecnologic]

Hi, everyone! Today I’ve got 521 error on domain http://www.zoomtecnologico.com We server was running.

Please what can I do to sorted it out.
Regards

[domjh]

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 …

[prensazoomtecnologic]

My server is running without problems, however, they indicate that the problem comes from Cloudflare, should I modify any parameter? I ask because until yesterday the web worked without difficulties.

Greetings.

[domjh]

So if you pause Cloudflare on the site (overview tab, bottom right) then it works fine?

[prensazoomtecnologic]

Yes, works fine.

[domjh]

Are you able to pause Cloudflare now so we can take a look?

Edit:
As it says in the post I linked to, are the Cloudflare IPs whitelisted?

[prensazoomtecnologic]

I just paused Cloudflare

[domjh]

Ok, thank you.

This would suggest to me that you need to do the following steps from the linked article.

Make sure that you’re not blocking Cloudflare IPs in .htaccess, iptables , or your firewall.

Make sure your hosting provider isn’t rate limiting or blocking IP requests from the Cloudflare IPs and ask them to whitelist the IP addresses IP Ranges

[prensazoomtecnologic]

I just updated the ips that you indicated to me, do you know how I can check if it is online?
Thank you

[sdayman]

It’s working, but it’s not going through Cloudflare. You’ll have to unpause Cloudflare to see if your whitelist worked.