More .NET components

Standards and platform support

100% managed .NET code with no external dependencies #

  • Rebex SFTP is written in 100% managed C# code.
  • No external dependencies. It only needs .NET Framework.
  • No open source code used.
  • Fully CLS-compliant.
  • Supports any .NET language (C#, VB.NET, C++/CLI, etc.)
  • Platform-independent code. Same assemblies for both 32-bit and 64-bit applications.
  • Complete source code available.

.NET Framework on Windows #

Rebex SFTP supports the following platforms:

  • .NET Framework 4.7
  • .NET Framework 4.6.x
  • .NET Framework 4.5.x
  • .NET Framework 4.0
  • .NET Framework 3.5
  • .NET Framework 3.0
  • .NET Framework 2.0
  • Both 32-bit and 64-bit versions (same DLLs)

Legacy binaries for .NET Framework 1.0 and 1.1 are available for registered customers.
For details, see legacy platform support section.

Supported IDE versions:

  • Microsoft Visual Studio 2008
  • Microsoft Visual Studio 2010
  • Microsoft Visual Studio 2012
  • Microsoft Visual Studio 2013
  • Microsoft Visual Studio 2015
  • Microsoft Visual Studio 2017

Supported Windows versions:

  • Windows 10
  • Windows 8
  • Windows 8.1
  • Windows 2012 Server
  • Windows 2012 Server R2
  • Windows 2008 Server
  • Windows 2008 Server R2
  • Windows 7
  • Windows Vista

Mono on Linux #

Rebex SFTP supports Mono version 3.x, 4.x on Linux and Apple macOS (OS X).

.NET Compact Framework on handhelds and mobiles #

Rebex SFTP for .NET Compact Framework supports several Microsoft handheld and mobile platforms.

Supported frameworks:

  • .NET Compact Framework 2.0
  • .NET Compact Framework 3.5
  • .NET Compact Framework 3.9

Supported mobile operating systems:

  • Windows CE
  • Pocket PC
  • Windows Mobile
  • Windows Embedded Compact 2013

Supported IDE versions:

  • Microsoft Visual Studio 2008
  • Microsoft Visual Studio 2012
  • Microsoft Visual Studio 2013

Xamarin.iOS #

  • Xamarin Studio/Visual Studio with Xamarin.iOS 8.6 or later
  • iOS 5.1.1 or later

Xamarin.Android #

  • Xamarin Studio/Visual Studio with Xamarin.Android 4 or later
  • Android 2.3.3 or later (Android API version 10 or later)

Xamarin.Mac #

Experimental version of Rebex SFTP for Xamarin.Mac is included in the installation package.

Supported projects:

  • Xamarin.Mac Mobile
  • Xamarin.Mac .NET 4.5 Framework

Requires Xamarin Studio with Xamarin.Mac 2.x or later and OS X 10.7 or later.

Universal Windows Platform #

Experimental version of Rebex SFTP for Universal Windows Platform is included in the installation package.

Supported platforms:

  • Windows 10 Store Apps
  • Windows 10 Mobile
  • Windows 10 IoT

.NET Core #

Experimental version of Rebex SFTP for .NET Core is included in the installation package.

Supported platforms:

  • .NET Core 1.1
  • .NET Standard 1.5 (on .NET 4.6.2 and .NET 4.7)


Rebex SFTP can be used within an ASP.NET web page. However, you have to keep in mind specific features of the ASP.NET platform (it is stateless, multithreaded, it may be limited by MediumTrust security level...).

For more details, see How to use Rebex SFTP or FTP/SSL in ASP.NET knowledge base article or try the SFTP client in ASP.NET sample.

Windows Store/Windows Phone apps #

Experimental version of Rebex SFTP for Windows Store and Windows Phone is included in the installation package.

Supported platforms:

  • Windows 8 Store Apps
  • Windows 8.1 Store Apps
  • Windows Phone 8.1 Apps

Library variants:

  • Class Libraries for Windows Store Apps

    Supports Windows 8.0 and 8.1, suitable for Windows Store Apps.

  • Portable Class Libraries for Universal Apps (PCL)

    Supports Windows 8.1 and Windows Phone 8.1, suitable for Portable Apps, Windows Store 8.1 Apps and Windows Phone 8.1 Apps.

Learn more about usage and limitations of this version...

Internet RFC specifications #

Rebex SFTP supports SSH2 protocol and implements the following specifications:

SSH1 is not supported - it is no longer considered secure and has been considered deprecated more than 15 years ago.

Please note that some non-essential features might not be supported. Let us know if you need to add anything.

SFTP version 3 and 4 #

Supported SFTP protocol versions:

  • SFTP protocol version 3.
  • SFTP protocol version 4, which adds:
    • Separate last access time and last modified time file attributes
    • String-based user and group file attributes
    • Mandatory UTF-8 charset
    • Newline extension (automated OS type detection)

FIPS 140-2 mode #

Rebex SFTP can operate in a FIPS 140-2 compliant mode. When enabled, only FIPS-approved cryptographic modules from MS CryptoAPI are used. FIPS mode is activated automatically when Windows is running in FIPS mode. To switch on the FIPS mode manually, set
Rebex.Security.Cryptography.CryptoHelper.UseFipsAlgorithmsOnly to true.

Legacy platform support #

Legacy version of Rebex SFTP for .NET Framework 1.0 and 1.1 is still available for registered customers. Although it's no longer maintained or supported, it has been used by thousands of developers in production environments for years, which still makes it a viable option when legacy platform support is needed.

For details, see How long will Rebex support old versions of .NET Framework knowledge base article or download a trial version of File Transfer Pack for .NET 1.1 (no longer maintained or supported).

Proxy servers #

  • SOCKS4
  • SOCKS4a (Socks4 with domain name resolving)
  • SOCKS5
  • HTTP proxies with CONNECT method support
  • Tunneling through SSH servers

Learn how to use proxy servers in Rebex SFTP.

Cryptographic algorithms #

  • Diffie-Hellman key exchange
  • RSA
  • DSA (with support of non-standard key sizes of up to 4096 bits)
  • Tripple DES
  • ArcFour (compatible with RC4)
  • AES (Rijndael)
  • Blowfish
  • CTR and CBC block cipher modes
  • SHA-1
  • SHA-2 (SHA-256, SHA-384, SHA-512)
  • MD5

Learn more about SSH security settings.

Private key formats #

  • PKCS #8 keys
  • PuTTY .ppk keys
  • OpenSSH/OpenSSL (SSLeay) keys
  • Keys on smart cards
  • Certificate-based keys

Learn more about private keys in Rebex SFTP.

Scripting platforms #

Rebex SFTP is designed primary for use in .NET framework applications. However, it can be used in several other scripting and hosting environments:

  • Microsoft SQL Server SSIS packages
  • Microsoft SQL Server SQL CLR stored procedures
  • Microsoft PowerShell scripts

See how to use Rebex SFTP in SSIS, SQL CLR and PowerShell environments.

Other technologies #