Released: Jun 25, 2026

Updates in 8.0.9673

Features

• Asynchronous SSH/SFTP server core - Rebex File Server features a SSH and SFTP cores that has been upgraded to fully asynchronous mode, making it less thread-hungry and more scalable. A nice side-effect of this is the new asynchronous mode in PreAuthentication and Authentication events.
• Server-side FTP protocol support - Rebex File Server now supports the FTP protocol in addition to SFTP. Modern FTP over TLS 1.3/1.2 is fully supported. Old-style plain FTP can be optionally enabled as...

Released: Jun 1, 2026

Updates in 7.0.9649

Features

• Cryptography: Added workaround for uncommon RSA keys with very long exponents.
• Cryptography: Now checks public key during any Diffie-Hellman key exchange.
• Cryptography: Improved compatibility with Windows CNG keys.
• Cryptography: Improved private key handling in CNG interop.
• Cryptography: Now uses constant-time-compares where appropriate.
• SSH: Improved compatibility of 'SSH2 PUBLIC KEY' file loader.
• SSH: Now clears raw SSH_MSG_USERAUTH_REQUEST contents as soon as encrypted.
• SSH: Now...

Released: Mar 5, 2026

Updates in 7.0.9561

Features

• Terminal: Better handling of Unicode surrogate pairs in Terminal.Save method.

Fixes

• SFTP: Fixed detection of wrong SSH_FXP_DATA response order.
• SFTP: Fixed synchronization of access to list of transfers on instances of Sftp.
• MIME: Fixed ArgumentOutOfRangeException in MimeEntity.SetContent for empty bodies with BOM.
• Terminal: Fixed TerminalOptions.SelectGraphicRendition1, independent to SGR sequence ordering now.
• SSH: Fixed receive buffer space adjustment logic (client side).

Released: Nov 12, 2025

Updates in 7.0.9448

Features

• Support for .NET 10 - This release adds a new set of binaries targeting .NET 10. It supports the following platforms:
  • Windows (x64, x86, ARM64).
  • Linux (x64, ARM32, ARM64).
  • Android (x64, ARM32, ARM64).
  • macOS (ARM64, x64).
  • iOS/iPadOS/tvOS (ARM64).
• Support for Visual Studio 2026
  • All Rebex libraries are now fully supported in Microsoft Visual Studio 2026.
• Common: Improved work with internal shared array pool.

Fixes

• SSH: Fixed error type and message on invalid packet length in EtM cipher...

Released: Sep 16, 2025

Updates in 7.0.9391

Fixes

• All: Various documentation improvements.
• File Server: Fixed UNC paths handling in FileTransferredEventArgs.FullPath.
• File Server: Increased maximum number of terminal rows/columns to 1024.
• File System: Fixed resolving of slash-terminated MountCapableFileSystemProvider mount paths.
• File System: MemoryFileSystemProvider files no longer lose content when its parent directory is moved.
• POP3: Pop3.Disconnect method throws exception if unable to delete messages marked for deletion.

Released: Jun 30, 2025

Updates in 7.0.9313

Features

• SFTP: Added CurrentFileBytesTotal to TransferProgressChanged event arguments.
• FTP: Added CurrentFileBytesTotal to TransferProgressChanged event arguments.
• Mail: Added IgnoreRedundantAsn1Data option to MailSettings/MimeOptions.
• ZIP: Improved handling of 'version needed to extract' field to increase support for ZIP archives created on various platforms.
• Cryptography: Added IgnoreRedundantData option to SignedData and EnvelopedData classes.

Fixes

• File System: Fixed possible...

Released: Mar 18, 2025

Updates in 7.0.9209

Features

• IMAP: Added missing UID validity check to Imap.Purge() methods.
• IMAP: Added HasChildren/HasNoChildren properties to ImapFolder.
• Mail: Added workaround for "multipart/signed" entities misplaced as views.
• SSH: Added support for PKCS #1 public RSA key format to SshPublicKey.
• SSH: Added workaround for problem with Socket.Poll in .NET 6 on Linux.

Fixes

• FTP: Fixed possible internal error in multi-file operations; an exception with TransferProblemType.​CannotRetrieveItemInfo is now raised...

Released: Jan 15, 2025

Updates in 7.0.9147

Features

• Security: Prevented potential timing attack in XTS/AES tweak chunk preparation.
• Common: Improved internal APM->TAP bridge for Socket methods on old platforms.

Fixes

• FTP: Added workaround for HGFTP servers badly-formatted PWD response.
• File Server: Fixed possible deadlock in FileServer.Stop method when stopping the server while a transfer is active.
• File System: Fixed possibly outdated directory listing in MountCapableFileSystemProvider when a directory is unmounted.
• File System...

Released: Dec 18, 2024

Updates in 7.0.9119

Features

• FTP: Added Ftp Settings TcpKeepAliveInterval option.
• FTP: Added handling for more variants of NOOP response during transfer.
• FTP: Added workaround for ProFTPd that returns wrong 'cdir' type in MLST listings.
• MIME: Added MailMessage.​Settings.​TreatAdditionalMixedTextPartsAsView option.
• Terminal: Improved logging of connection closed in Scripting API.
• TLS Core: Better exception handling when TLS 1.3 socket is disposed while negotiation is in progress.

Fixes

• File Server: Fixed handling of...

Released: Nov 12, 2024

Updates in 7.0.9083

Features

Support for Microsoft .NET 9 - This release adds a new set of binaries targeting .NET 9. They support all .NET 9 platforms:

• Microsoft Windows (x64, x86, ARM64).
• Linux (x64, ARM32, ARM64).
• Android (x64, ARM32, ARM64).
• Apple macOS (ARM64, x64).
• Apple iOS/iPadOS/tvOS (ARM64).

Fixes

• File Server: Fixed possible double-close of file system item handle in rare circumstances.
• Graph: Added workaround for occasional "503 Service Unavailable" errors.
• Cryptography: Added workaround for...