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Trustwave Knowledge Base

Home » Knowledgebase » INFO: FTP over HTTP: Unauthorized - Error 401

INFO: FTP over HTTP: Unauthorized - Error 401

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  • Description
    When trying to access an FTP site, error 401 with error reason: “FTP over HTTP: Unauthorized” is returned.

  • Symptoms
    When browsing to a password protected FTP site through the Vital Security Web Appliance, the browser returns the following error:


     
    When browsing straight to the web-site, a dialog box which requires the user credentials appears:


  • Cause
    The problem is caused because the Secure Web Gateway Appliance is trying to access the FTP server with an anonymous account, which results in a failed login attempt.
    This happens generally due to protocol requirements, and not specific to SWG appliance or software!

  • Solution
    In order to resolve this issue, the login credentials must be included in the URL in the following format: ftp://username:password@ftp.adress.com

  • Software Version
    general protocol requirement, not related to any SWG version

    • This article applies to:
    all SWG appliances
    This article was previously published as:
    Finjan KB 1576

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