To require logon and in effect anonymous logon and to set it so all users go to the same ftp folder
in proftpd.conf file do this
# Use this to jail all users in their homes # DefaultRoot ~ DefaultRoot /mnt/FTP/FTP # Users require a valid shell listed in /etc/shells to login. # Use this directive to release that constrain. RequireValidShell on # RequireValidShell off