HTTP 407 Proxy Authentication Required vs 508 Loop Detected
HTTP 407 (Proxy Authentication Required) is a 4xx Client Error response, while 508 (Loop Detected) is a 5xx Server Error response. 407 indicates that the client must first authenticate itself with the proxy. In contrast, 508 means that the server detected an infinite loop while processing the request (WebDAV).
Description
The client must first authenticate itself with the proxy.
When You See It
When accessing the internet through a corporate proxy that requires authentication.
How to Fix
Configure proxy credentials in your HTTP client or browser settings.
Description
The server detected an infinite loop while processing the request (WebDAV).
When You See It
When WebDAV encounters circular references in bindings.
How to Fix
Fix the circular reference in the WebDAV configuration.
Key Differences
407 is a 4xx Client Error response, while 508 is a 5xx Server Error response.
HTTP 407: The client must first authenticate itself with the proxy.
HTTP 508: The server detected an infinite loop while processing the request (WebDAV).
You encounter 407 when when accessing the internet through a corporate proxy that requires authentication.
You encounter 508 when when WebDAV encounters circular references in bindings.
When to Use Which
For 407 (Proxy Authentication Required): Configure proxy credentials in your HTTP client or browser settings. For 508 (Loop Detected): Fix the circular reference in the WebDAV configuration.