6/21/2023 0 Comments Configure openssh![]() Verify that the SSH server is enabled and view its configuration. The Cisco IOS Security Configuration Guide and the Cisco IOS Security Command Reference provide more information about AAA. Authentication retries is the number of SSH client connection attempts after which the interface is reset. For example:Ĭiscosystem(config)# username ServerUser password 0 ciscoĬiscosystem(config)# ip ssh authentication-retries 3Īuthentication timeout is the interval, measured in seconds, that the SSH server waits for the SSH client to respond. When configuring AAA, the administrator specifies usernames and passwords, the session timeout, and the number of retries allowed during an SSH connection attempt. Deleting the DSA key pair, by entering the crypto key zeroize dsa command, automatically disables the SSH server.Ĭonfigure Authentication, Authorization, and Accounting (AAA) for SSH client access control. Generating an DSA key pair automatically enables the SSH server. Deleting the RSA key pair, by entering the crypto key zeroize rsa command, automatically disables the SSH server.įor Cisco IOS release train 12.3(4)T, 12.3(2)XE, 12.2(25)S, or 12.3(7)JA, enable the SSH server by generating a DSA key pair.Ĭiscosystem(config)# crypto key generate dsa Generating an RSA key pair automatically enables the SSH server. The IOS software uses the domain name to complete unqualified hostnames.įor Cisco IOS release train 12.0S, 12.0ST, 12.1T, 12.1E, 12.2, 12.2T, or 12.2S, enable the SSH server by generating an RSA key pair.Ĭiscosystem(config)# crypto key generate rsa The hostname is the name of the device, and the domain name is the host domain that the device services. ![]() The Cisco IOS Configuration Fundamentals and Network Management Configuration Guide provides information about downloading an IOS software image.Įnsure that the device has a hostname and a properly configured host domain.Ĭiscosystem(config)# ip domain-name The SSH server feature for SSH2 support is available in the following Cisco IOS release trains: 12.3(4)T, 12.3(2)XE, 12.2(25)S, and 12.3(7)JA. The SSH server feature for SSH1 support is available in the following Cisco IOS release trains: 12.0S, 12.0ST, 12.1T, 12.1E, 12.2, 12.2T, and 12.2S. Run the following command to display the loaded IOS software image: Verify that the device supports the SSH server feature. To configure the SSH server on a Cisco device:Įnsure that the device has a session password and a privileged-mode enable password. The public key of the generated public/private key pair is referred to as the “public host key” or just “host key.” Configuring a network device to use SSH requires that an administrator perform the following basic steps for each network device that is to be SSH enabled:Įnable the SSH transport support for the virtual-terminal connections.
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