Rebex File Server

SFTP, SCP and SSH server component for .NET

Download 30-day free trial Buy from $349

Standards and platform support

100% managed .NET code with no external dependencies 

  • Rebex File Server is written in 100% managed C# code.
  • No external dependencies. It only needs .NET.
  • 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.

Please note that support for virtual file systems is only available for .NET 4.0 or higher. It is not available for .NET 2.0/3.0/3.5.

.NET Framework on Windows 

Rebex File Server supports the following .NET Framework platforms:

  • .NET Framework 4.8
  • .NET Framework 4.7.x
  • .NET Framework 4.6.x
  • .NET Framework 4.5.x
  • .NET Framework 4.0
  • .NET Framework 3.5 SP1
  • .NET Framework 3.5
  • .NET Framework 3.0
  • .NET Framework 2.0
  • Both 32-bit and 64-bit versions (same DLLs)

Supported IDE versions:

  • Microsoft Visual Studio 2019
  • Microsoft Visual Studio 2017
  • Microsoft Visual Studio 2015
  • Microsoft Visual Studio 2013
  • Microsoft Visual Studio 2012

Supported Windows versions:

  • Windows 10
  • Windows Server 2019
  • Windows Server 2016
  • Windows 8.1
  • Windows Server 2012 R2
  • Windows Server 2012
  • Windows Server 2008 R2
  • Windows Server 2008
  • Windows 7 SP1

Rebex File Server is known to work on Windows 8, Windows Vista, Windows XP SP3, Windows Server 2003 R2, Windows Embedded Standard 2009 and Windows Embedded POSReady 2009. However, these platforms already reached end-of-life, which means we cannot guarantee support for Rebex File Server on these operating systems.

.NET Core 

Rebex File Server supports .NET Core platform.

Supported frameworks:

Supported operating systems:

  • Windows 10
  • Windows 10 IoT (.NET Core 3.1 and 3.0)
  • Windows 8.1
  • Windows 7 SP1
  • Windows Server 2008 R2 SP1
  • Linux
  • macOS
  • Same DLLs for all platforms (32-bit x86, 64-bit x64, ARM)

.NET Standard 

Rebex File Server supports .NET Standard 1.5/2.0 on .NET Core. It also supports .NET Standard 2.0 on Mono 5.14 (or higher). Support for .NET Standard 2.0 on Universal Windows Platform (build 16299 or higher) and Xamarin.Mac (version 3.8 or higher) is experimental.

Mono on Linux 

Rebex File Server supports Mono 4.x/5.x on Linux and Apple macOS (OS X).

Please note that support for virtual file systems is not available on .NET Compact Framework.

Xamarin.iOS 

  • Visual Studio with Xamarin.iOS 10.3 or later
  • iOS 10 or later

Xamarin.Android 

  • Visual Studio with Xamarin.Android 9.1 or later

Xamarin.Mac 

Rebex File Server features experimental support for Xamarin.Mac 3.8 or later via .NET Standard 2.0.

Universal Windows Platform 

Rebex File Server features experimental support for Universal Windows Platform (UWP/UAP) applications on Windows 10 via .NET Standard 2.0.

Supported platforms:

  • Windows 10 (version 1709 or higher)
  • Windows 10 IoT (version 1709 or higher)

In order to use Rebex File Server on these platforms, make sure to specify at least Windows 10 Fall Creators Update (10.0; Build 16299) in your Universal Windows project.

Legacy platform support 

Legacy edition of Rebex File Server for the following platforms is available as a separate product:

  • .NET Compact Framework 3.5/3.9

Legacy platforms are platforms that are no longer covered by our Standard Support, but have not yet reached End of Life. For details, see the following KB articles:

.NET Compact Framework 

Rebex File Server supports .NET Compact Framework on Microsoft's legacy embedded, handheld and mobile platforms based on Windows CE.

Supported frameworks:

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

Supported operating systems:

  • Windows Embedded Compact 2013
  • Windows Embedded Compact 7
  • Windows Embedded Handheld 6.5
  • Windows Embedded CE 6.0 (end-of-life platform)
  • Windows CE 5.0 (end-of-life platform)
  • Windows Mobile 5.0, 6.0, 6.1, 6.5 (end-of-life platforms)

Supported IDE versions:

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

Please note .NET Compact Framework is a legacy platform, which means that Rebex File Server for .NET CF is available as a separate product with different lifecycle and pricing.

Internet RFC specifications 

Rebex File Server 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 File Server 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.

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
  • Twofish
  • CTR and CBC block cipher modes
  • SHA-1
  • SHA-2 (SHA-256, SHA-384, SHA-512)
  • MD5

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 File Server.

Scripting platforms 

Rebex File Server is designed primary for use in .NET framework applications. However, it can be used in other scripting and hosting environments such as Microsoft PowerShell.

Following blogpost shows how to use Rebex SFTP in PowerShell. Usage of Rebex File Server is very similar - just use different assemblies.

Other technologies 

  • IPv4 and IPv6 support