Try Gene6 FTP server.
Gene6 FTP Server is an advanced FTP server software for Windows developed specifically for security and high performance requirements. Gene6 FTP Server is a professional Windows FTP Server featuring speed, reliability and customization. Its main assets are remote administration, encrypted (SSL 128 bits) connection, and ease of use. Its fast performances allow it to run heavily loaded files servers worldwide but this does not make it out of range of smaller companies who will find in it a customizable, trustable and easy to administer FTP server at an affordable price.
Remote administration – Secure remote administration to administer your server from everywhere
MODE Z – Faster data transfers through data compression
ODBC – Database storage of accounts information (MySQL, PostGreSQL …)
30 days trial – Professional version available for download
Addons Library – Open architecture, COM object, develop VB script to automate tasks
Localized Interface – Use the software in your own language (10+ available already)
HIPAA Compliant – Compliant with exigent secure requirements from medical companies
Virtual Directories – Share files from anywhere even from other FTP servers!
128 bits SSL support – Transfer your files with top industry security over internet with FTP over SSL, just like https
UTF-8 – Display filenames in foreign languages with their native charset
External Authentication – Windows User/Active Directory/Database authentication
Advanced Security – Multiple mechanisms are implemented to tighten accounts security