I turn on Proxy and got 520 after DDoS attack

Hi Cloudflare community, I got DDoS attack reach to 520 and prevent it immediately in my host. My hosting was working good after 20 minutes but my website still 520, I don’t know how to solve because my host worked stable. I think about cloudflare issue and come to cloudflare and turn off proxy of my domain then it worked and my website work fine again.
In the next day, i turn on proxy of my domain and 520 appear immediately. I don’t know why, please help me.
I finding answers on cloudflare community but can not find the solution.


Here are some root causes of 520 errors. This means your origin responded to us with a unexpected result.

Below are some items that are some common causes of 520 errors.

This topic was automatically closed 15 days after the last reply. New replies are no longer allowed.