Nginx Reverse Proxy and Cloudflare issues

[dmz]

Hi @chench0,
I’m not familiar with nginx, but I will try to help you.

---

Did you read this CommunityTip about Error 521?

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 …

There is also a summary for all 5XX error codes:

Community Tip - Fixing 5XX Errors & All 5XX Tips

Introduction Use this Community Tip to understand more about 5XX errors, identify if they are from the origin server or the proxy, and click-through to supporting Community Tips for troubleshooting. Background Generally, 5xx error codes indicate that an error or unresolvable request occurred on the server side, whether that is a proxy or the origin host. The server was able to detect the error and thus will not return the potentially malformed response to the client. These error codes be used…

---

If you have already done so, it is best to wait for @sandro or some other nginx-aware member to respond.

Hope these links can help you.