Users might have trouble connecting through Internet Explorer. This is because IE, among others, tries to connect anonymously and may not give pure-ftpd the proper chance to request a username and password. One can, in the pure-ftp.conf file change the line BrokenClientsCompatibility from no to yes. This might or might not work, it seems to depend upon what version of IE that someone is using.
However, they should be able to use their browser by typing in an address like
ftp://john@ftpserver.example.com
with john being the username and ftpserver.example.com being, obviously enough, the ftp server.
http://www.scottro.net/qnd/qnd-pureftpd.html