407 Proxy Authentication Required | HTTP Status Code

Explanation

The 407 (Proxy Authentication Required) status code is similar to 401 (Unauthorized), but indicates that the client must first authenticate itself with the proxy. The proxy MUST send a Proxy-Authenticate header field containing a challenge applicable to the proxy for the target resource.

The client MAY repeat the request with a new or replaced Proxy-Authorization header field. If the 407 response contains the same challenge as the prior response, and the user agent has already attempted authentication at least once, then the user agent SHOULD present the enclosed entity to the user since it might contain relevant diagnostic information.

Example Response

HTTP/1.1 407 Proxy Authentication Required
Proxy-Authenticate: Basic realm="Proxy"
Content-Type: text/html

<html>
<head>
<title>Proxy Authentication Required</title>
</head>
<body>
<h1>Proxy Authentication Required</h1>
<p>This proxy requires authentication.</p>
</body>
</html>

Related Status Codes

401 401 Unauthorized