Highly configurable GPL-licensed FTP server software
EditByBSEditor: ProFTPD grew out of the desire to have a secure and configurable FTP server, and out of a significant admiration of the Apache Web Server.

ProFTPD offers the following features, with many more planned:

* Single main configuration file, with directives and directive groups which are intuitive to any administrator who has ever used the Apache web server.
* Per directory .ftpaccess configuration Similar to Apaches .htaccess.
* Easy to configure multiple virtual FTP servers and anonymous FTP services.
* Designed to run either as a stand-alone server or from inetd/xinetd, depending on system load.
* Anonymous FTP root directories do not require any specific directory structure, system binaries or other system files.
* No SITE EXEC command. In Modern Internet environments, such commands are a security nightmare.
* Source code is available (and must always be available) for administrators and developers to audit.
* Hidden directories and files, based on Unix-style permissions or user/group ownership.
* Runs as a configurable non-privileged user in stand-alone mode in order to decrease chances of attacks which might exploit its root abilities. Note: This feature is dependent on the capabilities of the host Unix system.
* Logging and utmp/wtmp support. Logging is compatible with the wu-ftpd standard, with extended logging available.
* Shadow password suite support, including support for expired accounts.
* Modular design, allowing server to be extended easily with modules. Modules have been written for SQL databases, LDAP servers, SSL/TLS encryption, RADIUS support, etc.
* IPv6 support. you can free download ProFTPD for Linux 1.3.3rc1 now.