HTTP 403 Forbidden vs 505 HTTP Version Not Supported
HTTP 403 (Forbidden) is a 4xx Client Error response, while 505 (HTTP Version Not Supported) is a 5xx Server Error response. 403 indicates that the server understood the request but refuses to authorize it. Unlike 401, authentication will not help — the user simply does not have permission. In contrast, 505 means that the server does not support the HTTP version used in the request.
Description
The server understood the request but refuses to authorize it. Unlike 401, authentication will not help — the user simply does not have permission.
When You See It
When trying to access a resource you're authenticated for but don't have permission to access.
How to Fix
Check your user role/permissions. Contact the admin to request access.
Description
The server does not support the HTTP version used in the request.
When You See It
When a client uses an HTTP version the server doesn't support.
How to Fix
Use a supported HTTP version (typically HTTP/1.1 or HTTP/2).
Key Differences
403 is a 4xx Client Error response, while 505 is a 5xx Server Error response.
HTTP 403: The server understood the request but refuses to authorize it. Unlike 401, authentication will not help — the user simply does not have permission.
HTTP 505: The server does not support the HTTP version used in the request.
You encounter 403 when when trying to access a resource you're authenticated for but don't have permission to access.
You encounter 505 when when a client uses an HTTP version the server doesn't support.
When to Use Which
For 403 (Forbidden): Check your user role/permissions. Contact the admin to request access. For 505 (HTTP Version Not Supported): Use a supported HTTP version (typically HTTP/1.1 or HTTP/2).