If you'd like an easy way to put a more robust FTP server solution in place, check out CrushFTP by Ben Spink. CrushFTP is a Java-based application that runs on OS X (and OS 9!).
It has a wealth of options, including:
- User (add/delete/modify) management within CrushFTP
- Set disk quotas and other privileges by directory
- Set maximum idle and connect times and bandwidth limits
- Limit max downloads per session
- Easily specify which port CrushFTP will serve from
- Control which days a user may connect
- Limit or allow connections based on IP address
- Generate detailed usage reports
CrushFTP is a $20 shareware application, and it's a fully try-before-you-buy package. If you're looking for a more advanced FTP server package, check it out.
NOTE: I am not a registered CrushFTP user, as my FTP needs are simple. It just seems like a well-developed alternative to the bundled OS X FTP server, with easily defined options. As with anything that allows direct access to your machine, please make sure you're comfortable with the product and its background before installing or using it!

