Recently a few users on a Virtualmin server have experienced issues with slow FTP logins. It took a long time to login and often wouldn't log in at all.

To correect this, first log on to the Webmin interface on http://yourserver:10000. At the top left, click Webmin.

A bit further down, under Servers, select ProFTPD Server.

Under Global Configuration, select the Networking icon.

Then you’ll see a screen with a whole bunch of settings. Set the following options to No:

1. Set Lookup remote Ident username?
2. Do reverse DNS lookups of client addresses?

Now click save, and on the ProFTPd page press Apply settings on the bottom. Your logins should now be instant.