HTTP 407 Proxy Authentication Required indicates the client must authenticate with the proxy before the request can be forwarded. The response includes a Proxy-Authenticate header specifying the authentication scheme required by the proxy.
Status
407 Proxy Authentication RequiredExample
Request
GET /news/article HTTP/1.1
Host: www.example.com
User-Agent: Mozilla/5.0
Accept: text/htmlResponse
HTTP/1.1 407 Proxy Authentication Required
Content-Type: text/html; charset=utf-8
Proxy-Authenticate: Basic realm="Corporate Proxy"
Content-Length: 215
<!doctype html>
<html lang="en">
<head>
<title>407 Proxy Authentication Required</title>
</head>
<body>
<h1>Proxy Authentication Required</h1>
<p>You must authenticate with the proxy server before browsing the internet.</p>
</body>
</html>How to Troubleshoot
1
Provide proxy credentials
Configure your HTTP client or browser with the proxy username and password.
curl -x http://proxy:8080 --proxy-user username:password https://example.com/
2
Check proxy configuration
Verify the proxy server address, port, and authentication method in your system or browser settings.
Common Causes
Corporate proxy requires authentication
highThe organization's proxy server requires credentials before allowing internet access.
Related Status Codes
References
| Specification | Section |
|---|---|
| HTTP Semantics | RFC 9110 §15.5.8 |
Frequently Asked Questions
This reference was compiled from official RFCs, protocol specifications, and hands-on troubleshooting experience. AI tools were used primarily for formatting and organizing the content on the page.