ProFTPD is a powerful modular FTP/SFTP/FTPS server. This File Transfer Protocol daemon supports also hidden directories, virtual hosts, and per-directory ".ftpaccess" files. It uses a single main configuration file, with a syntax similar to Apache.

Because of the advanced design, anonymous-FTP directories can have an arbitrary internal structure (bin, lib, etc, and special files are not needed). Advanced features such as multiple password files and upload/download ratios are also supported.

This module is contained in the contrib/mod_wrap.c file for ProFTPD 1.2+. It enables the daemon to use the common tcpwrappers access control library while in standalone mode, and in a very configurable manner.