heres my working proftpd.conf to allow write access
RequireValidShell on
# Limit the maximum number of anonymous logins
MaxClients 5
# We want 'welcome.msg' displayed at login, and '.message' displayed
# in each newly chdired directory.
DisplayLogin welcome.msg
DisplayFirstChdir .message
# Limit WRITE everywhere in the anonymous chroot
#<Directory *>
# <Limit WRITE>
# DenyAll
# </Limit>
# </Directory>
# Uncomment this if you're brave.
# # <Directory incoming>
# # # Umask 022 is a good standard umask to prevent new files and dirs
# # # (second parm) from being group and world writable.
# # Umask 022 022
# # <Limit READ WRITE>
# # DenyAll
# # </Limit>
# # <Limit STOR>
# # AllowAll
# # </Limit>
# # </Directory>
#
# </Anonymous>
Also heres MasterC 's guide to proftp found
Here
*edit* added URL