How To
Summary
The error message 407 Proxy Authentication Required indicates the request to download the Admin UI content payload was blocked by a proxy server that requires authentication.
Objective
Steps
1. Verify Proxy Settings:
- Check if your network uses a proxy server. If so, ensure your application or system is configured with the correct proxy settings, including the proxy address, port, and credentials (username/password).
- For Windows:
- Go to Settings > Network & Internet > Proxy and check the proxy configuration.
- Alternatively, run `netsh winhttp show proxy` in Command Prompt to view the current proxy settings.
- For Linux/macOS:
- Check environment variables like `http_proxy`, `https_proxy`, or `all_proxy` using `echo $http_proxy` in the terminal.
2. Provide Proxy Authentication:
- If the proxy requires authentication, ensure the credentials are correctly configured in your application or system.
- For command-line tools (e.g., `curl`, `wget`):
- Example for `curl`: `curl --proxy-user username:password -x http://proxy-server:port <URL>`
- Example for environment variables: `export http_proxy=http://username:password@proxy-server:port`
- For applications, check their configuration files or settings for proxy authentication options.
3. Bypass Proxy for Internal URLs (if applicable):
- If the Admin UI content is hosted on an internal server, configure a no-proxy rule for the specific URL or domain.
- For example, set the `no_proxy` environment variable: `export no_proxy=localhost,127.0.0.1,internal-domain.com`
4. Check Application-Specific Proxy Settings:
- If the error occurs in a specific application (e.g., a web browser or admin tool), check its proxy settings.
- For browsers:
- Chrome: Settings > System > Open your computer’s proxy settings.
- Firefox: Settings > General > Network Settings.
- For custom applications, refer to their documentation for proxy configuration instructions.
5. Network Configuration:
- Contact your network administrator to confirm the proxy server details and obtain valid credentials.
- Ensure the proxy server is accessible and not misconfigured.
6. Test Connectivity:
- Try accessing the URL directly (e.g., using `curl` or a browser) to confirm if the issue is proxy-related or if the server itself is unreachable.
- Example: `curl -v <URL>` to see detailed error messages.
7. Update or Clear Proxy Cache:
- If the proxy server caches authentication or content, clear the cache or restart the proxy service (if you have administrative access).
- Ensure your proxy client or application is updated to the latest version to avoid compatibility issues.
8. Firewall or Security Software:
- Check if a firewall or security software is intercepting the connection and enforcing proxy authentication. Temporarily disable it to test, or configure it to allow the connection.
Additional Information
If You’re a Developer: (OPTIONAL)
- Code-Level Fix:
- If your application makes HTTP requests, ensure the HTTP client library (e.g., `HttpClient` in .NET, `requests` in Python) is configured with proxy credentials.
- Example for .NET (`HttpClient`):
```csharp
var handler = new HttpClientHandler
{
Proxy = new WebProxy("http://proxy-server:port", false)
{
Credentials = new NetworkCredential("username", "password")
}
};
var client = new HttpClient(handler);
```
- Example for Python (`requests`):
```python
import requests
proxies = {
"http": "http://username:password@proxy-server:port",
"https": "http://username:password@proxy-server:port"
}
response = requests.get("URL", proxies=proxies)
```
- Ensure the proxy server allows HTTP range requests and partial responses (e.g., “Allow HTTP partial response” in Palo Alto firewalls).
Example:
Example within Microsoft’s “Proxy server support in Configuration Manager‘s support page:”
Document Location
Worldwide
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Document Information
Modified date:
11 August 2025
UID
ibm17241955