After setting up an account with Pureftpd, you are likely to be greeted by an error 553:
It has to do with the user and group permission. Solution:
1. Edit your Pure-ftpd account and set UID and GID to www (or any other).
2. SSH to root console. and run
Replace “/home/backup” with your ftp folder. This command assigns userid www, usergroup www to be the the owner of that folder and all the folder underneath it (R = recursive)