Debian Admin published a guide about setting up ProFTPD with TLS (Transport Layer Security) on Debian GNU/Linux

ProFTPD is a ftp server written for use on Unix and Unix-a-like operating systems, there is no support for native use under Microsoft Windows.This tutorial will explain how to setup proftp server with TLS in debian etch.The TLS protocol allows applications to communicate across a network in a way designed to prevent eavesdropping, tampering, and message forgery. TLS provides endpoint authentication and communications privacy over the Internet using cryptography.

FTP Server setup with TLS (Transport Layer Security) on Debian