CloudFlare Error 522 - How to Solve?

[harrygreen90]

Hi everyone,
I am getting Error 522 from CloudFlare, I thought it came from my hosting problem but tried to login into web hosting with real IP address and it still worked. I thought it supposed that the problem from CloudFlare. I installed csf firewall and it is safe to add all ips of cloud flare in allow list of csf firewall to fix this error?

 

[virtubox]

The possible errors are listed here : [URLnofo]https://support.cloudflare.com/hc/en-us/articles/200171906-Error-522-Connection-timed-out[/URLnofo]

If you are using a firewall, yes you have to allow all Cloudflare IPs. It's probably this error or a very similar error.

 

[weekhost]

Connection timed out, add CloudFlare IPs to whitelist.

 

[UWH-David]

Absolutely. You can whitelist/auto-allow the CloudFlare network along with any modsec vendors in your CSF configuration with no problems.

CloudFlare IPv4 list as of 10/3/16:

IPv4

103.21.244.0/22
103.22.200.0/22
103.31.4.0/22
104.16.0.0/12
108.162.192.0/18
131.0.72.0/22
141.101.64.0/18
162.158.0.0/15
172.64.0.0/13
173.245.48.0/20
188.114.96.0/20
190.93.240.0/20
197.234.240.0/22
198.41.128.0/17
199.27.128.0/21