HTTP 407 Proxy Authentication Required — What It Means & How to Fix It

The HTTP 407 Proxy Authentication Required status code indicates the client must first authenticate with the proxy server before the request can proceed. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: Similar to 401, but authentication is required with a proxy, not the origin server.. The response includes a Proxy-Authenticate header specifying the authentication method.. The client should resend the request with Proxy-Authorization credentials.. This is common in corporate networks that require proxy authentication.. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: A proxy server requires authentication and no credentials were provided.. Proxy authentication credentials are invalid or expired.. Corporate network proxy enforces authentication for internet access.. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Configure your client with the correct proxy authentication credentials.. Check the Proxy-Authenticate header for the required authentication scheme.. Contact your network administrator for proxy credentials.. Verify proxy settings in your browser or application configuration.. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our HTTP Status Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.