FTPServer disabling anonymous not compatible with Windows Explorer
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Key: FTPSERVER-390
URL: https://issues.apache.org/jira/browse/FTPSERVER-390
Project: FtpServer
Issue Type: Bug
Components: Core
Affects Versions: 1.0.5
Reporter: Matthew Schulze
When using Windows Explorer to attempt to connect to an FTP connection, it
first attempts an anonymous login and then prompts the user for credentials
after failure. Disabling anonymous login on the current version of Apache FTP
Server returns a 530 response and immediately closes the connection, preventing
the credentials dialog from appearing in Explorer and causing an error dialog
to be displayed.
If the USER command is successful and the anonymous user is rejected after the
PASS command is sent with a 421 response sent by the server, Windows Explorer
is able to handle the login process properly. To maintain maximum
compatibility, anonymous user checks should all be handled in the PASS command.
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