What is HTTP Response Status Code 407 Proxy Authentication Required?
HTTP response status code 407 Proxy Authentication Required indicates that the client must authenticate with a proxy before accessing the requested resource.
The server includes a Proxy-Authenticate header, specifying the authentication method required to access the proxy.
This status code is used in scenarios where network access is controlled through a proxy server that requires user credentials.
It ensures that only authorized users can access resources through the proxy, enhancing security and access control.
Example 1: Missing Proxy Authentication
# Client sends a request without proxy authentication. GET /restricted-resource HTTP/1.1 Host: www.example.com # Server Response HTTP/1.1 407 Proxy Authentication Required Date: Wed, 09 Oct 2024 14:40:00 GMT Server: Apache/2.4.41 (Ubuntu) Proxy-Authenticate: Basic realm="Access to the proxy" # The client is informed that it must authenticate with the proxy server.
Example 2: Invalid Proxy Credentials
# Client sends a request with invalid proxy credentials. GET /data HTTP/1.1 Host: api.example.com Proxy-Authorization: Basic invalid_credentials # Server Response HTTP/1.1 407 Proxy Authentication Required Date: Wed, 09 Oct 2024 14:42:00 GMT Server: Nginx/1.18.0 Proxy-Authenticate: Basic realm="Access to the proxy" # The server informs the client that the provided credentials are incorrect.
Summary
The HTTP 407 Proxy Authentication Required status code ensures that clients must authenticate with a proxy server before accessing resources. It provides a secure way to control access through proxy authentication mechanisms.
