Free secure ftp file transfer software for linux

Simple File Transfer is a pure useless program which allows you exchange files with remote computers via Internet. This program has been written for personnal use, so dont blame me if you think I am stupid doing such tool for the others.
It should run on every POSIX compliant Operating System, but I cant give you any complete list.
If you want to compile it under *BSD, maybe youll have to disable the uname() call by running the configure script with the --with-uname=no option.
Enhancements:
- Added the support of hostnames for the destination server

Fast Secure File System exports existing directories securely over the network, letting users store and retrieve encrypted data in a scalable and transparent way. FSFS is written in C and works on GNU/Linux systems on x86 and PPC architectures, with help from FUSE and OpenSSL.
File systems are easily the most evident, from the point of view of users, component of an operating system. Through file systems it is possible to organize data in a wide variety of ways, and access resources through a common interface.
Users can nowadays not only store and retrieve documents, but also find information on running processes and system settings (through ProcFS), access and manipulate e-mail (for example with GmailFS), or perform several other operations.
In several circumstances and scenarios it is desirable to protect stored files and directories from manipulation by unknown or malicious users: financial or health-related data, confidential documents, or any kind of personal or sensitive data may need to be stored securely, in such a way that it can not be examined or modified freely by third parties.
Most file systems do not take action in this sense, and external cryptographic utilities are sometimes employed to secure data before storage. While this can be a perfectly secure solution, it is not transparent to users.
Distributed file systems propose efficient ways of accessing data remotely as if it resided on the local machine; when it comes to dealing with securely stored data as in the examples above, care must be taken to preserve confidentiality and integrity also during network transfer.
Not all distributed file systems accomplish this task, weakening the overall security of the system, or do so inefficiently, making it inconvenient for users.
FSFS is a secure, distributed file system in users space, written in C with much help from FUSE and OpenSSL. It lets users store and retrieve data securely and transparently, knowing that it is protected both on permanent storage devices and while in transit over the network.
It is also concerned with scalability, therefore separates data cryptography from the server, leaving it to the clients; this approach is similar to the one used in CFS, and opposite to those taken on by other secure file system solutions (like NFS on top of IPsec).
FSFS is written as a pair of user space daemons that act as client and server. Because of this, it needs no kernel support (unlike NFS over IPsec), save the FUSE loadable kernel module on clients, included in Linux since 2.6.14; servers dont use FUSE and depend only on user space OpenSSL libraries.
Servers export an existing file system (of virtually any kind) to clients over the network through two separate channels: a TLS connection set up with OpenSSL, and a clear channel. Requests from the clients to the servers are sent via the TLS socket, thus they are encrypted and authenticated, according to TLS v1 specifications, by the channel itself and decrypted on receipt, as they are usually very short and the relevant cryptography does not constitute a great overhead; simple server replies undergo the same process.
Cryptography in this case happens at both ends of the transmission.
In a distributed file system, large amounts of data may be transferred between clients and servers, thus encrypting and decrypting everything may become too cumbersome for both parties, and as more clients are added to the system the server may severely lose performance; moreover, file data should be stored encrypted anyway, so the cryptography could be moved to the clients, in such a way that each encrypts data before a write operation sends it over the network to the server, and decrypts it after a read retrieves it.
This way servers only deal with TLS details and can concentrate on serving client requests by doing the relevant I/O on the underlying, "physical" file system. As the data is already encrypted, it does not need to go through the TLS channel and the corresponding overhead, but can be sent via the clear channel, provided the messages are authenticated.
Enhancements:
- This release fixes two bugs. One bug related to socket creation and would cause problems on some systems (namely OpenSUSE 10.2). The other bug related to server configuration creation when using the Python configuration utilities. Users dont need to upgrade to this release if theyre not experiencing problems or are not using the Python configuration utilities.

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.

KSendfile is a native SAFT client. Compared to the Bitnet up to now there was no asynchronous file transfer service defined in the Internet. The existing standard file transfer, the ftp, is a synchronous service: an interactive login on both ends of the file transfer is mandatory for the user to set up a connection between both points.
If a user A wants to send a file to user B they have the following choices:
- ftp to a recipients account B
In this case one has to know the password of the recipients account. If A and B are not the identical person, severe questions of security arise and it is not the method of choice. Even if account A and B belong to the same person, the typed ASCII password characters for ftp access will travel open (readable) as ordinary TCP packets through the network.
- ftp using an anonymous ftp server
The file has to be uploaded by A onto the anonymous ftp server using an ftp session. After that A has to notify B about this using e-mail informing this user about the fact that the file is ready for download now. B can get the file now by doing another ftp transfer. This procedures requires a common reachable ftp server, with an upload (write access) facility. During the time the file resides on the anonymous ftp server it is open to anyone, it may be readable, writeable, changeable or erasable.
- sending a file via e-mail
A is sending a file to B enclosed into an e-mail. According to RFC 822 a mail must contain characters from the NVT-ASCII character set, which is a subset of the 7 bit ASCII character set. The file transfer via e-mail is limited to English text documents or the text to be sent must be encoded properly, of course using the NVT-ASCII character set. Encoding procedures like uuencode or MIME are available. It is not a pleasure to use either of them, they dont support all file ownership attributes and they will enlarge the amount of data to be transferred by encoding. In addition to this most of the existing MTAs are not designed to handle large amount of data transfers.
To avoid all the described disadvantages the SAFT-protocol (Simple Asynchronous File Transfer) has been developed and the sendfile software has been created as a reference implementation for UNIX platforms.
Enhancements:
- Fixed a bug in ksendfilenetclient::sendFile when getting status code 531
- Added Resend Function
- Fixed bug in ksendfilenetclient::sendfile in the date function
- Now sends the file date, not the actual system date.

Rad SFTP Applet is a graphical secure FTP (SFTP) applet. It is multi-threaded and thus capable of carrying out several concurrent uploads and downloads and resuming interrupted transfers.
The applet received a four star rating from jars.com - the premier java software review site and became featured on the official java website as well.
The secure FTP applet is ideal for Internet Service Providers and web hosting companies as a value addition to their service. The applet will also help web and software companies to reduce license costs with its per web site license model.
The desktop client is suited for individuals or organizations looking for a secure alternative to FTP.
Enhancements:
- Bugfixes and other improvements related to the management of hidden files and folders.

Secure Messaging is a Web-based, alternative mail system for sending and receiving messages.

Use secure messaging to send and receive messages from a alternative web-based mail system. Using the secure messaging system no actual mail is transmitted through any 3rd party servers.

Only an optional message notice is sent to the recepient, the user needs to visit the site in order to read the message.

Normal SMTP mail can hit multiple servers and can possibly be read, stored, or changed anywhere within the process.

Setup secure messaging on an SSL enabled website to enhance the privacy even more.

CrossFTP for Firefox is a versatile Cross-Platform FTP client extension.

This plugin contains two FTP tools: CrossFTP Client and Server. which will appear in the Firefoxs Tools menu:

- CrossFTP Client is a versatile GUI FTP client for multiple platforms. It uses a familiar, Explorer-like interface that even the most novice user can master in minutes.
- CrossFTP Server is a professional FTP Server for multiple platforms. It offers you a high-performance, extremely configurable, and most of all a secure FTP server.