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. It indicates that you need to provide valid credentials to proceed. The Proxy-Authenticate header in the response offers 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 itself may be misconfigured or 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 there are any specific requirements or configurations 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"Proxy Authentication Required Proxy Authentication Required
You must authenticate with a proxy server to access this resource.
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