Configuring Secure Shell on Routers and Switches Running Cisco IOS Downloads * Configuring Secure Shell on Routers and Switches Running Cisco IOS Document ID: 4145 Contents Introduction Prerequisites Requirements Components Used Conventions SSH v1 vs. SSH v2 Network Diagram Test Authentication Authentication Test without SSH Authentication Test with SSH Optional Configuration Settings Prevent Non-SSH Connections Set Up an IOS Router or Switch as SSH Client Add SSH Terminal-Line Access Configure the SSH Version Variations on banner Command Output Unable to Display the Login Banner debug and show Commands Sample Debug Output Router Debug Server Debug What can go Wrong SSH From an SSH Client Not Compiled with Data Encryption Standard (DES) Bad Password SSH Client Sends Unsupported (Blowfish) ...