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.
| Header type | Response header |
|---|---|
| Forbidden header name | no |
Proxy-Authenticate: <type> realm=<realm>
Authentication type. A common type is "Basic". IANA maintains a list of authentication schemes.
A description of the protected area, the realm. If no realm is specified, clients often display a formatted host name instead.
Proxy-Authenticate: Basic Proxy-Authenticate: Basic realm="Access to the internal site"
| Specification |
|---|
| HTTP Semantics # field.proxy-authenticate |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
Proxy-Authenticate |
1 |
≤79 |
1 |
No |
Yes |
No |
37 |
Yes |
Yes |
Yes |
No |
Yes |
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https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Proxy-Authenticate