Some advise on the basis of FAQs and experiences of the past years:

• The user name is included in the URL. You may find it between the protocol identifier and the @ sign. ('inflab')
  (Due to safety reasons, the password is not included in the URL. A good browser will ask for it anyhow.)
• The Firefox is not able to upload to an FTP server, so you are to use an FTP client. If you are a Windows user, e.g. the TotalCmd is OK.
• WARNING Some browsers doesn't respect the standard protocols. (Q.: Which one?) Those one, for examle, can not handle the "331" code ("Password required", in deatils, see RFC640.) of FTP servers and will indicate an "Authentication error" rather than calling the login dialog box. To solve the above problem, see chapter 3.1 of RFC1738

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Last modified 09/18/2012 Felicián Németh