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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:

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