HTTP 523 Origin Is Unreachable vs 530 Site Frozen
Both HTTP 523 (Origin Is Unreachable) and 530 (Site Frozen) belong to the 5xx Server Error category. 523 indicates that cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route). Meanwhile, 530 means that cloudflare-specific. Used by Pantheon hosting to indicate a frozen site.
Description
Cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
When You See It
When Cloudflare's DNS for the origin fails to resolve.
How to Fix
Verify DNS records in Cloudflare dashboard. Check origin server's IP address.
Description
Cloudflare-specific. Used by Pantheon hosting to indicate a frozen site.
When You See It
When a site on Pantheon hosting has been frozen due to inactivity.
How to Fix
Reactivate the site on the hosting platform.
Key Differences
HTTP 523: Cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
HTTP 530: Cloudflare-specific. Used by Pantheon hosting to indicate a frozen site.
You encounter 523 when when Cloudflare's DNS for the origin fails to resolve.
You encounter 530 when when a site on Pantheon hosting has been frozen due to inactivity.
When to Use Which
For 523 (Origin Is Unreachable): Verify DNS records in Cloudflare dashboard. Check origin server's IP address. For 530 (Site Frozen): Reactivate the site on the hosting platform.