FTP through WebMarshal with IE does not prompt for authentication


This article applies to:

  • WebMarshal
  • Internet Explorer 

Symptoms:

  • Attempting to connect to a FTP server that requires credentials, using Internet Explorer
  • WebMarshal returns an error message: Authentication Required. User "anonymous" cannot log on to FTP server. 530 User anonymous cannot log in.

Causes:

  • When using a HTTP proxy to access a FTP site that require login, Internet Explorer does not prompt for login credentials when anonymous access fails. This is a behavior of Internet Explorer, and is not specific to WebMarshal.

Resolution:

To resolve this issue, you can do one of the following:

  • Include login credentials in the URL in the following format: ftp://username:password@ftp.address.com/.
  • Use another browser, such as Firefox or Chrome, that correctly presents the credential request when required.

Notes:

  • Ensure you are using the latest version of WebMarshal. Versions 6.1.2 and below may not pass FTP authentication correctly regardless of the browser used.

Last Modified 4/10/2011.
https://support.trustwave.com/kb/KnowledgebaseArticle14146.aspx