[Contents] [Index]

About This Document>>     Introduction to SSH Secure Shell >>         Network Security Risks         Protocol Features         Different Versions of the SSH Protocol         Legal Issues with Encryption         Supported Platforms         Support     Configuring SSH Secure Shell >>     Authentication >>     Log Messages >>     Using SSH Secure Shell >>     Tool Syntax>>     Technical Specifications >>

Protocol Features

The SSH Secure Shell products from SSH Communications Security use the Secure Shell version 2 (SSH2) protocol. The SSH2 protocol is being standardized in the Secsh Working Group of the Internet Engineering Task Force (IETF).

The SSH2 protocol contains the following features:

• Secure terminal sessions utilizing secure encryption.
• Full, secure replacement for FTP and Telnet, as well as the UNIX r-series of commands: rlogin, rcp, rexec.
• Multiple high security algorithms and strong authentication methods that prevent such security threats as identity spoofing.
• Multiple ciphers for encryption, including 3DES, Blowfish, and AES.
• Transparent and automatic tunneling of X11 connections and arbitrary TCP/IP-based applications, such as e-mail.
• Automatic and secure authentication of both ends of the connection. Both the server and the client are authenticated to prevent identity spoofing, Trojan horses, and so on.
• Multiple channels that allow multiple terminal windows and file transfers through one secure and authenticated connection.