For example, suppose that you deny all users permission to access an FTP site, and then you allow a particular IP address to access the site. When you then use the ftp command to try to access the site, you may receive an error message that resembles the following:
421 Service not available, closing control connection.
Connection closed by remote host.
However, the FTP service will re-read and apply changes to the IP restriction list if you change one or more of the following settings:
Article ID: 948660 - Last Review: Feb 20, 2009 - Revision: 1