HTTP 300 Multiple Choices vs 407 Proxy Authentication Required
HTTP 300 (Multiple Choices) is a 3xx Redirection response, while 407 (Proxy Authentication Required) is a 4xx Client Error response. 300 indicates that the request has more than one possible response. The client should choose one of them. In contrast, 407 means that the client must first authenticate itself with the proxy.
Description
The request has more than one possible response. The client should choose one of them.
When You See It
When a resource is available in multiple formats (e.g., different languages or media types).
How to Fix
Select the appropriate resource variant. Send an Accept header with your preferred content type.
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.
Key Differences
300 is a 3xx Redirection response, while 407 is a 4xx Client Error response.
HTTP 300: The request has more than one possible response. The client should choose one of them.
HTTP 407: The client must first authenticate itself with the proxy.
You encounter 300 when when a resource is available in multiple formats (e.g., different languages or media types).
You encounter 407 when when accessing the internet through a corporate proxy that requires authentication.
When to Use Which
For 300 (Multiple Choices): Select the appropriate resource variant. Send an Accept header with your preferred content type. For 407 (Proxy Authentication Required): Configure proxy credentials in your HTTP client or browser settings.