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Proxy-Authenticate

The HTTP Proxy-Authenticate response header defines the authentication method that should be used to gain access to a resource behind a proxy server. It authenticates the request to the proxy server, allowing it to transmit the request further.

The Proxy-Authenticate header is sent along with a 407 Proxy Authentication Required.

Syntax

Proxy-Authenticate: <type> realm=<realm>

Directives

<type>
Authentication type. A common type is "Basic". IANA maintains a list of authentication schemes.
realm=<realm>
A description of the protected area, the realm. If no realm is specified, clients often display a formatted host name instead.

Examples

Proxy-Authenticate: Basic

Proxy-Authenticate: Basic realm="Access to the internal site"

Specifications

Specification Title
RFC 7235, section 4.3: Proxy-Authenticate HTTP/1.1: Authentication
RFC 7617 The 'Basic' HTTP Authentication Scheme

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 1 ? 1 ? Yes ?
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support ? Yes ? Yes Yes ? ?

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Proxy-Authenticate