Websites work fine when not using DNS Proxy record. When Proxy enabled, website are not reachable

websites work fine when not using DNS Proxy record. When Proxy enabled, website are not reachable. Problem started on 20.02 same hour when Cloudflare had outages on EU region.

Are you still encountering this?

Hello cloonan.
Yes, in all my domains.
if I disable Proxy on dns records, everything works fine. With Proxy enabled, cannot access websites.

What is the domain name?

unizkm.al for example, I have A records for portal.unizkm.al with proxy disabled, it works. payments.unizkm.al does not work (proxy enabled) (same IP/server for both). If I enable proxy for portal.unizkm.al CF retursn 522

This subdomain works, but gives a 403 block page from Cloudflare (likely you have a Cloudflare WAF rule blocking where I’m testing from).
https://cf.sjr.org.uk/tools/check?ac83dc3520d6430cb786a91ef63a371e#connection-worker

portal.unizkm.al (that you have unproxied) times out from where I’m testing. Do you have a firewall on your origin for this subdomain, and is it blocking Cloudflare’s IP addresses?

Hello sjr.
I disabled WAF rules in CF and on my firewall (geoip based)
Will test for a few hours and update you on the matter. Thanks

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portal.unizkm.al is now proxied and working…
https://cf.sjr.org.uk/tools/check?543ef3836e5443459f47e4e96846f7aa#connection-server

If using the proxy, you can protect your origin by setting your origin firewall to allow only Cloudflare’s IP addresses.

Hi,
the tool you provided turned to be very helpful in troubleshooting.
Your suggestion is wonderful. Does CF have a finite list of IP-s ?

Here…

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