Existing FTP server code?

[vglass at jscape.com]

Depending on which language and protocol you want to use consider the
following

SFTP (FTP over SSH)

http://www.jscape.com/sftp/ (Java classes)

http://www.jscape.com/sshfactorydotnet/ (.NET classes)

FTPS (FTP over SSL)

http://www.jscape.com/sftp/ (Java classes)

http://www.jscape.com/sftpdotnet/ (.NET classes)