4×× CLIENT ERROR

407 PROXY AUTHENTICATION REQUIRED

Similar to 401 Unauthorized, but it indicates that the client needs to authenticate itself in order to use a proxy.

The proxy MUST send a Proxy-Authenticate header field containing a challenge applicable to that proxy for the target resource. The client MAY repeat the request with a new or replaced Proxy-Authorization header field.

Proxy-Authenticate RFC7235 Section 4.3

Proxy-Authorization RFC7235 Section 4.4

407 PROXY AUTHENTICATION REQUIRED Source: RFC7235 Section 3.2

 

407 CODE REFERENCES

Rails HTTP Status Symbol :proxy_authentication_required

Go HTTP Status Constant http.StatusProxyAuthRequired

Symfony HTTP Status Constant Response::HTTP_PROXY_AUTHENTICATION_REQUIRED

Python2 HTTP Status Constant httplib.PROXY_AUTHENTICATION_REQUIRED

Python3+ HTTP Status Constant http.client.PROXY_AUTHENTICATION_REQUIRED

Python3.5+ HTTP Status Constant http.HTTPStatus.PROXY_AUTHENTICATION_REQUIRED

Recommended:

• 406 NOT ACCEPTABLE HTTP
• 405 METHOD NOT ALLOWED