We couldn't connect to this host

Reference guide

Does the site load normally for you right now, in your own browser?

Yes, it loads fine for me

Request path

  1. You (reached)
  2. DNS (reached)
  3. Cloudflare edge (reached)
  4. Origin (not reached)

unreachable

Our scanning probe couldn't reach your origin, but the site loads normally for you — this points to something specific to our probe, not a general outage.

What to do

  1. Check. Check your origin firewall/WAF logs for blocked requests around the time of this scan.
  2. Fix. Allow Cloudflare's published IP ranges in your origin firewall or WAF, if they're currently being blocked.
    curl https://www.cloudflare.com/ips-v4
  3. Verify. Re-run the scan.

No, it's down for me too

The origin appears to be unreachable, both to our probe and to you directly.

What to do

  1. Check. Check your hosting provider's status page and your origin server's uptime/process status.
  2. Fix. Restart or investigate the origin server/application process.
  3. Verify. Confirm the site loads in your browser, then re-run the scan.

Not sure / haven't checked

Our probe couldn't reach this host, but we don't yet know whether that's specific to our probe or a real outage.

What to do

  1. Check. Try loading the site yourself, ideally from a different network than usual.
  2. Fix. If it loads for you, this is likely probe-specific — check firewall/WAF rules. If it doesn't load for you either, treat it as a real outage and check your origin server.
  3. Verify. Re-run the scan once you've checked directly.

Want to narrow it down interactively instead? Use the error lookup tool.