Server Unreachable for various domains after IP Change

Website, Application, Performance Getting Started
1

What is the name of the domain?

What is the error number?

521

What is the error message?

Server Unreachable for shortmemory.org

What is the issue you’re encountering

Site loads fine but getting “There has been a spike in 521 errors from your origin”

What steps have you taken to resolve the issue?

  1. Verified that your website is online
  2. Remove blockers between Cloudflare and your website
    Added Cloudflare IPs to WordFence firewall allow list
    Checked to see if any of these IP’s are blocked at my server - negative
    Added a CF Rule as suggested by wordfence
  3. Reviewed Cloudflare DNS settings
  4. A valid SSL on the origin web server
  5. mod_reqtimeout and mod_antiloris is not on (support ticket sent but all likelihood negative.

Any test to run to see if this is a server issue or Cloudflare?

2

Were you actually encountering errors or were you just receiving email notifications? In the case of the latter, it may have been the following.

3

It was the latter, only email alerts. Thank you for the heads-up.

1 Like
4

Looks like it’s happening again. Same 3 sites, same issue, getting notifications but sites are up. Where would I report this?

5

Thanks for mentioning it here. I am seeing some other recent reports here in the Community. We’ll collect them for escalation.

6

Here is some relevant information for you.

7

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