Specifying the SSH Public Keys in IETF SECSH Format.Specifying the SSH Public Keys in Open SSH Format.SSH public key in one of three different formats: You can configure an SSH public key to log in using an SSH client without being prompted for a password. Switch# copy running-config startup-config Specifying the SSH Public Keys for User Accounts
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Running configuration to the startup configuration.Įxample shows how to generate an SSH server key: The range is from 768 to 2048 and the default value is 1024. Is an RSA key that is generated using 1024 bits.īits argument is the number of bits used to generate the key. SSH server key based on your security requirements. User account with the same name as the remote user account is configured on the device before the SSH keys are imported. Or TACACS+) for the purpose of SSH Passwordless File Copy will not persist when the Nexus device is reloaded unless a local SSH public and private keys imported into user accounts that are remotely authenticated through a AAA protocol (such as RADIUS The Cisco Nexus device supports only SSH version 2 (SSHv2). SSH has the following configuration guidelines and limitations: The Telnet server is enabled by default on the Cisco Nexus device. Telnet can accept either an IPĪddress or a domain name as the remote system address. Telnet allows a user at one site to establish a TCP connection toĪ login server at another site, and then passes the keystrokes from one system to the other. The Telnet protocol enables TCP/IP connections to a host. If you delete all of the SSH keys, you cannot start the SSH services. SSH supports the following public key formats: The rsa option generates the RSA key-pair for the SSH version 2 protocol.īy default, the Cisco Nexus device generates an RSA key using 1024 bits. The dsa option generates the DSA key-pair for the SSH version 2 protocol.
The SSH service accepts three types of key-pairs for use by SSH server key-pair according to the SSH client version used. SSH version 2 using the Digital System Algrorithm (DSA)īe sure to have an SSH server key-pair with the appropriate version before enabling the SSH service.
SSH version 2 using Rivest, Shamir, and Adelman (RSA) public-key cryptography You can use SSH keys for the following SSH options: SSH requires server keys for secure communications to the Cisco Nexus device. The SSH client in the Cisco Nexus device works with publicly and commercially available SSH servers. With authenticationĪnd encryption, the SSH client allows for a secure communication over an insecure network. This connection provides an outbound connection that is encrypted. SSH client enables a switch to make a secure, encrypted connection to another Cisco Nexus device or to any other device running an SSH server. The SSH client feature is an application running over the SSH protocol to provide device authentication and encryption. The user authentication mechanisms supported for SSH are RADIUS, TACACS+, and the use of locally stored user names and passwords. The SSH server in the Cisco Nexus device switch interoperates with publicly and commercially available SSH clients. SSH uses strong encryption for authentication. The Secure Shell Protocol (SSH) server feature enables a SSH client to make a secure, encrypted connection to a Cisco Nexus device. Information About SSH and Telnet SSH Server This chapter contains the following sections: