How to verify the validity of the agent(With Username/Password Authentication)

1. Using Command-Line Tools (With Username/Password Authentication)

• Socks5 Proxy: You can use curl to authenticate and test a Socks5 proxy:

  curl --proxy socks5://“username:password”@Hostname:Port https://mayips.com

  If the proxy is valid and authentication is successful, you will see the response from the website. If authentication fails, you will likely receive a 403 Forbidden or other authentication error.

• HTTP Proxy: Similarly, for HTTP proxies, use:

  curl --proxy http://“username:password”@Hostname:Port https://mayips.com

  If the proxy is valid and the password is correct, you will see the website content. If there's an error, it will typically indicate authentication failure (e.g., 407 Proxy Authentication Required).

2. Using Browser Configuration (With Username/Password Authentication)

To manually verify the proxy with username and password in a browser, you can follow these steps:

• Chrome/Firefox:

  1. Go to your browser's proxy settings (typically in network settings).

  2. Enter the proxy server address, port, username, and password.

  3. Visit a website to see if it loads successfully. If the proxy and authentication are correct, the website content should appear; if authentication fails, the browser will usually show Proxy authentication failed or 403 Forbidden.

3. Using Proxy Testing Software (With Username/Password Authentication)

Many proxy testing tools support username and password authentication, such as Proxy Switcher or Proxifier. In the software, you would configure the proxy by entering the proxy address, port, username, and password, then test to see if the proxy works correctly.

4. Using Postman for Testing

You can also use Postman to test the proxy. Configure the proxy with username and password authentication in Postman, then send a request to see if the response is valid.

Common Errors When Proxy Authentication Fails:

• 407 Proxy Authentication Required: The proxy server requires authentication.

• 403 Forbidden: Proxy authentication failed, or the proxy server is rejecting the connection.

• Timeout: The proxy request timed out, which may indicate that the proxy server is unreachable or incorrectly configured.

These methods can help you verify the validity of a proxy that requires username and password authentication.