This document describes how to configure Secure Shell (SSH) on the inside and outside interfaces of the Cisco Series Security Appliance Versions 9.x and later. When you must configure and monitor the Cisco Adaptive Security Appliance (ASA) remotely with the CLI, the use of either Telnet or SSH is required. Because Telnet communications are sent in clear text, which can include passwords, SSH is highly recommended. The SSH traffic is encrypted in a tunnel and thereby helps protect passwords and other sensitive configuration commands from interception.
The ASA allows SSH connections to the security appliance for management purposes. The security appliance allows a maximum of five concurrent SSH connections for each security context, if available, and a global maximum of 100 connections for all of the contexts combined.