One alternative server is NcFTPd, available from www.ncftp.com. This server provides its own optimized daemon. In addition, NcFTPd has the capability to cache directory listings of the FTP server in memory, thereby increasing the speed at which users can obtain a list of available files and directories. Although NcFTPd has many advantages over some other FTP servers, NcFTPd is not GPL-licensed software, and its licensing fees vary according to the maximum number of simultaneous server connections ($199 for 51 or more concurrent users and $129 for up to 50 concurrent users, but free to education institutions with a compliant domain name).
Do not confuse the
ncftp client with
ncftp-3.1 package included with Ubuntu ...