![]() The ip ssh rsa keypair-name command enables an SSH connection using the Rivest, Shamir, and Adleman (RSA) keys that you have configured. If you do not want your device to fall back to the undefined protocol (Version 1), you should use the ip ssh version command and specify Version 2. SSH Version 1 is a protocol that has never been defined in a standard. If you do not configure this command, SSH by default runs in compatibility mode that is, both SSH Version 1 and SSH Version 2 connections are honored. Ip ssh version command defines the SSH version to be configured. The configuration for the SSH Version 2 server is similar to the configuration for SSH Version 1. The Secure Shell Version 2 Support feature allows you to configure SSH Version 2. Information About Secure Shell Version 2 Support The following features are not supported:.The RSA key pair size must be greater than or equal to 768 bits.Devices that act as SSH clients need not generate RSA keys. Rivest, Shamir, and Adleman (RSA) key generation is an SSH server-side requirement.Execution Shell, remote command execution, and Secure Copy Protocol (SCP) are the only applications supported.Secure Shell (SSH) servers and SSH clients are supported in Triple Data Encryption Standard (3DES) software images.Restrictions for Secure Shell Version 2 Support The SSH client is supported in both k8 and k9 images depending on your release.)įor more information about downloading a software image, refer to theĬonfiguration Fundamentals Configuration Guide. (The SSH client runs both the SSH Version 1 protocol and the SSH Version 2 protocol. The SSH Version 2 server and the SSH Version 2 client are supported on your Cisco software, depending on your release. Therefore, AAA must be configured on the device to enable the secure copy protocol on the SSH Server. SCP relies on authentication, authorization, and accounting (AAA) to function correctly.You have to use a SSH remote device that supports SSH Version 2 and connect to a Cisco device.The SSH server requires you to have a k9 (Triple Data Encryption Standard ) software image depending on your release. Before configuring SSH, ensure that the required image is loaded on your device.Prerequisites for Secure Shell Version 2 Support Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module. For the latest caveats and feature information, seeīug Search Tool and the release notes for your platform and software release. Your software release may not support all the features documented in this module. The Secure Copy Protocol (SCP) feature that is provided with SSH allows for the secure transfer of files. SSH provides a means to securely access and securely execute commands on another computer over a network. The only reliable transport that is defined for SSH is TCP. (SSH Version 1 support was implemented in an earlier Cisco software release.) SSH runs on top of a reliable transport layer and provides strong authentication and encryption capabilities. The Secure Shell Version 2 Support feature allows you to configure Secure Shell (SSH) Version 2. Feature Information for Secure Shell Version 2 Support.Additional References for Secure Shell Version 2 Support.Example: Enabling ChPass and Expiring the Password After Three Logins.Example: Enabling ChPass and Changing the Password on First Login.Example: Enabling ChPass with a Blank Password Change.Examples: SSH Keyboard Interactive Authentication.Example: Starting an Encrypted Session with a Remote Device.Example: Configuring Secure Shell Versions 1 and 2.Example: Configuring Secure Shell Version 2.Example: Configuring Secure Shell Version 1.Configuration Examples for Secure Shell Version 2 Support.Monitoring and Maintaining Secure Shell Version 2.Verifying the Status of the Secure Shell Connection.Enabling Secure Copy Protocol on the SSH Server.Starting an Encrypted Session with a Remote Device.Configuring the Cisco IOS SSH Client to Perform RSA-Based Server Authentication.Configuring the Cisco SSH Server to Perform RSA-Based User Authentication.Configuring a Device for SSH Version 2 Using RSA Key Pairs.Configuring a Device for SSH Version 2 Using a Hostname and Domain Name.How to Configure Secure Shell Version 2 Support.SSH Keyboard Interactive Authentication.Secure Shell Version 2 Enhancements for RSA Keys.Information About Secure Shell Version 2 Support.Restrictions for Secure Shell Version 2 Support.Prerequisites for Secure Shell Version 2 Support.
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