Free secure ftp servers software for linux

Pure FTP Server is a fast, production quality, standards-conformant FTP server based on Troll-FTPd. Pure FTP Server has no known vulnerability, it is trivial to set up, and it is especially designed for modern kernels.
Features include PAM support, IPv6, chroot()ed home directories, virtual domains, built-in ls, FXP protocol, anti-warez system, bandwidth throttling, restricted ports for passive downloads, an LDAP backend, XML output, and more.
Beginners can install a Pure-FTPd server in 5 minutes. It can be as simple as installing the package, typing "pure-ftpd &" and... thats all. You already have a running server, and clients can start to connect.
Theres no need to review any long and complex configuration file, where possible mistakes could have security and reliability implications. Pure-FTPd uses simple command-line switches to enable the features you need.
You can limit the number of simultaneous users, limit their bandwidth to avoid starving your ADSL or cable-modem link, hide system files (chroot), have upload/download ratios, and moderate new uploads.
Custom messages can be displayed at login-time (even changing fortune files) and when an user enters a new directory. Also, to avoid your disks being filled up, you can defined a maximal percentage, and new uploads will be disallowed once this percentage is reached.
The FXP (server-to-server) protocol is implemented. It can be available for everyone, or only for authenticated users.
Kiddies are using common brute-forcing tools that are trying to discover hidden directories. Pure-FTPd provides a protection against this. Anonymous access is secure by default. For instance, users cant access dot-files (.bash_history, .rhosts, ...) unless you explicitely enable this.
And to watch whos doing what, the pure-ftpwho command shows a table with currently active sessions, how much bandwidth is taken by every user, what files they are uploading or downloading, where they are coming from, etc.
Enhancements:
- User names can now be up to 127 characters long.
- Compilation with PAM support has been fixed on Mac OS X, and the MySQL PASSWORD() function can now be used with MySQL >= 4.1.
- Logging now has the correct timezone.
- Support for charset conversions (RFC2640) has been implemented. Large files are now handled by default, using sendfile64() if possible. SITE UTIME and OPTS MLST have been implemented.
- MySQL queries can now include multiple statements and call MySQL 5 stored procedures.
- Transferring a lot of small files is now much faster than in previous versions.

Cheyenne Secure Web Server (SWS) is a comprehensive enterprise solution for Apache server. Cheyenne Secure Web Server combines http firewall, JAVA, PHP, PERL and a domain control system with Apache HTTPD platform.

Secure FTP is a client application that allows for a 128-bit encrypted secure connection to be made to a server that supports FTP over SSL (or FTPS).
The application can be run via its graphical user interface (GUI) or from the command-line interface (CLI), allowing for headless (scriptable) operation. This makes Secure FTP a great option for both novice and advanced users.
The client is fully RFC 2228 compliant and offers both types of SSL connection options: explicit and implicit, which means more server compatibility.
Secure FTP is free to use for noncommercial use. Those wishing to use the client for commercial purposes are granted a license free of charge for 30 days.
The client is supported on Windows, Mac OS X, and any Unix platform where a Java 2 runtime environment (version 1.4+) is present. It was written in 100% pure Java.
Enhancements:
- The software was translated into French.
- Minor bug fixes and library updates were done.

DeniX Server OS is an independent Linux based distribution built from scratch by Denis Salmanovich. They aim to offer a user-friendly full-featured server operating system, pre-configured, well structured and easy to work with, and filled with the latest stable versions of Linux apps.
Its easy to install and configure. Every package is downloaded from the authors source and compiled when installed.
Main features:
- Domain Controller
- ADSL/CABLE Router (PPPoE)
- Network Firewall
- Anti Virus Gateway
- Anti Spam Gateway
- Mail Server (local & external) + Web Mail
- Calendar Sharing Support
- Network File Server
- DHCP Server
- TFTP BOOT Server
- WINS Server
- FTP Server
- VPN Server
- DNS Server
- DDNS Server
- MySQL Server
- HTTP Apache Server
- Remote Backup Solutions
- Remote control and administration
- Print Queue Server
- Proxy Server

KcmPureftpd is an KDE KControl module for configuring pure-ftpd FTP server. The goal is to have medium users to configure their server securely and conveniently, without the burden of knowing tons of command line switches.

KcmPureftpd consist from two KControl modules:

* Script Generator - Its intended for system administrators which need to make or modify startup scripts for various administered servers. Of course, it work very well for your own little Linux/UNIX machine.
* Statistics - This module allow you to track statistics from pure-ftpd. You can see real time information about FTP connection on your FTP server as well you may follow information written to syslog by the server.

Secure-SLinux provides a secure, stable, and slim OS for professional enterprise servers. Secure-SLinux is based on the Linux kernel and GNU glibc, and builds on HLFS/BLFS.
It is quick to install (5-10 minutes), hardened (GRsecurity, PAX, RBAC, SSP, frandom, etc.), and easy to administrate. There are precompiled binary releases for console only and XOrg-based systems.
Main features:
- open source
- secure - hardened OS
- robust
- easy to administrate - comes out of the box with everything you need for your everyday administrative tasks
- easy to update - simply move a single link and keep your old versions
- suitable for all professional enterprise servers
- cost effective
... and it is installed in just 5 minutes!
Enhancements:
- SSLX-Desktop is the desktop environment for Secure-SLinux. It is based on programs such as XFCE, Firefox, Thunderbird, Filezilla, GIMP, OpenOffice.org, Eclipse, Bluefish, and Xfe.

Distributed FTP is a distributed FTP daemon written in java. Instead of usual and well-known serversclient transfer it uses masterclient for control connections and slaveclient for (most) data transfers, the master must tell the slave to initiate/respond to a transfer.

sftpup is used for uploading files to ftp servers and keep them consistent to a local directory.

To use sftpup go follow these steps:

1. Create a directory for your work, e.g. www where all files will be stored. For example, if you create your websites via XML and XSLT, make www the target for each generated file.
2. Upload all files to the ftp server. Your server directory and www are now in a consistent state. sftpup saves the state of www by calculating SHA hashes for each file. To initialize, execute:

sftpup --init your-config-file

The hashes are stored in the file given by hashfile in your-configfile.
3. If you change a file or directory (modified, deleted, added etc.) and want to do an update the ftp server, type:

sftpup --update your-config-file

sftpup compares HTML files with stored hashes and lists differences.This list is then used to make send appropriate commands to the ftp server.
4. To test what actions would be done, you can do a socalled dry-run by typing:

sftpup --dry-run your-config-file

sftpup then prints a list of commands and files/directories.