HTTP 302 Found vs 523 Origin Is Unreachable
HTTP 302 (Found) is a 3xx Redirection response, while 523 (Origin Is Unreachable) is a 5xx Server Error response. 302 indicates that the resource temporarily resides at a different URL. The client should continue using the original URL for future requests. In contrast, 523 means that cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
Description
The resource temporarily resides at a different URL. The client should continue using the original URL for future requests.
When You See It
During A/B testing, temporary maintenance pages, or geo-based redirects.
How to Fix
Follow the Location header. Note: browsers may change POST to GET on redirect.
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.
Key Differences
302 is a 3xx Redirection response, while 523 is a 5xx Server Error response.
HTTP 302: The resource temporarily resides at a different URL. The client should continue using the original URL for future requests.
HTTP 523: Cloudflare-specific. Cloudflare could not reach the origin server (DNS resolution failed or no route).
You encounter 302 when during A/B testing, temporary maintenance pages, or geo-based redirects.
You encounter 523 when when Cloudflare's DNS for the origin fails to resolve.
When to Use Which
For 302 (Found): Follow the Location header. Note: browsers may change POST to GET on redirect. For 523 (Origin Is Unreachable): Verify DNS records in Cloudflare dashboard. Check origin server's IP address.