vsftpd, which stands for "Very Secure FTP Daemon", is an FTP

File Transfer Protocol

File Transfer Protocol is a standard network protocol used to transfer files from one host to another host over a TCP-based network, such as the Internet. FTP is built on a client-server architecture and utilizes separate control and data connections between the client and server...

 server for Unix-like

Unix-like

A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification....

 systems, including Linux

Linux

Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

. It is licensed under the GNU General Public License

GNU General Public License

The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....

. It supports IPv6

IPv6

Internet Protocol version 6 is a version of the Internet Protocol . It is designed to succeed the Internet Protocol version 4...

 and SSL

Transport Layer Security

Transport Layer Security and its predecessor, Secure Sockets Layer , are cryptographic protocols that provide communication security over the Internet...

.

vsftpd supports explicit (since 2.0.0) and implicit (since 2.1.0) FTPS

FTPS

FTPS is an extension to the commonly used File Transfer Protocol that adds support for the Transport Layer Security and the Secure Sockets Layer cryptographic protocols....

.

vsftpd is the default FTP server in the Ubuntu

Ubuntu (operating system)

Ubuntu is a computer operating system based on the Debian Linux distribution and distributed as free and open source software. It is named after the Southern African philosophy of Ubuntu...

, CentOS

CentOS

CentOS is a free operating system based on Red Hat Enterprise Linux . It exists to provide a free enterprise class computing platform and strives to maintain 100% binary compatibility with its upstream distribution...

, Fedora

Fedora (operating system)

Fedora is a RPM-based, general purpose collection of software, including an operating system based on the Linux kernel, developed by the community-supported Fedora Project and sponsored by Red Hat...

, NimbleX

NimbleX

NimbleX is a small Slackware-based Linux distribution optimized to run from a CD, USB drive or a network environment. NimbleX has been praised for how fast it boots, as well as for its small disk footprint, which is considered surprising for a distribution using KDE as desktop environment...

 and RHEL Linux

Linux

Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

 distributions.

In July 2011 it was discovered that vsftpd version 2.3.4 downloadable from the master site had been compromised. Users logging into an instance of the compromised vsftpd-2.3.4 may issue a ":)" smileyface as the username and gain a command shell on a high tcp port. This was not an issue of a security hole in vsftpd, instead, someone had uploaded a different version of vsftpd which contained a backdoor.

See also

• FTP server
• List of FTP server software
• Comparison of FTP server software
  Comparison of FTP server software
  The table below compares basic characteristics of notable FTP Servers. This list is not exhaustive.- See also :* List of FTP server software* File Transfer Protocol * FTP over SSL * FTP over SSH* SSH file transfer protocol...
  
  
• TCP Wrapper
  TCP Wrapper
  TCP Wrapper is a host-based networking ACL system, used to filter network access to Internet Protocol servers on operating systems such as Linux or BSD...
  
  

External links

• List of Config Directives
• v(sftpd w)iki created due to vsftpd's lack of centralized documentation (there is little documentation to speak of at this website; last updated 09/2008)
• vsftpd Forum a vsftpd support Forum
• Guide to setting up vsftpd including TLS/SSL encryption
• Tutorial to setting up vsftpd with virtual users (VSFTPD+PAM+MySQL)
• Information about vsftpd at markhobley.yi.org

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.