SSH terminal-line access (also known as reverse-Telnet) was introduced in some Cisco IOS platforms and images starting in Cisco IOS Software Release 12.2.2.T. SSH client was introduced in some Cisco IOS platforms and images starting in Cisco IOS Software Release 12.1.3.T. SSH Version 1.0 (SSH v1) server was introduced in some Cisco IOS platforms and images that start in Cisco IOS Software Release 12.0.5.S. SSH was introduced into these Cisco IOS platforms and images:
The information in this document is based on Cisco IOS 3600 Software (C3640-IK9S-M), Release 12.2(2)T1. The Cisco IOS image used must be a k9(crypto) image in order to support SSH. This document contains more information on specific versions and software images. This document discusses how to configure and debug SSH on Cisco routers or switches that run a version of Cisco IOS ® Software that supports SSH.
Implement SSH version 2 when possible because it uses a more enhanced security encryption algorithm.
Communication between the client and server is encrypted in both SSH version 1 and SSH version 2. Secure Shell (SSH) is a protocol which provides a secure remote access connection to network devices.
