HTTP 407 Proxy Authentication Required Error - Meaning & Fix
The HTTP 407 Proxy Authentication Required error means your request was blocked by a proxy server requiring authentication. To proceed, you must provide valid credentials. The response includes a Proxy-Authenticate header with the necessary details for proper authorization.
Main causes
Incorrect or missing proxy credentials configured in the client's system or application.
The proxy server settings have been changed, requiring new authentication details that have not been updated on the client side.
The proxy server may be misconfigured, experiencing issues, incorrectly denying access, or failing to relay proper authentication protocols.
Network changes or security policies recently implemented that require additional authentication steps or updates to the existing proxy configuration.
# Request example curl -X POST https://sandbox.oxylabs.io/ -H 'Accept: */*;q=0.8' -H 'Accept-Encoding: br' -H 'User-Agent: AppleWebKit/537.36'
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Common fixes
Verify your proxy server settings to ensure they are correct and active.
Check the credentials used for authentication with the proxy server; update them if they are incorrect or expired.
Ensure your network configuration allows for proxy authentication, adjusting settings if necessary.
Contact your network administrator to confirm if any specific requirements or configurations are needed for proxy access.
# Response example HTTP/1.1 407 Proxy Authentication Required Content-Type: text/html Proxy-Authenticate: Basic realm="Access to internal site" <!DOCTYPE html> <html> <head> <title>Proxy Authentication Required</title> </head> <body> <h1>Proxy Authentication Required</h1> <p>You must authenticate with a proxy server to access this resource.</p> </body> </html>
