Reference Guide

806 | Security
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To configure host-based authentication:
Client-based SSH Authentication
SSH from the chassis to the SSH client using the command ssh ip_address. This method uses SSH version
1 or version 2. If the SSH port is a non-default value, use the command
ip ssh server port number, to
change the default port number. You may only change the port number when SSH is disabled. When must
then still use the
-p option with the command ssh.
Step Task Command Syntax Command Mode
1 Configure RSA Authentication. See RSA Authentication of SSH, above.
2 Create shosts by copying the public
RSA key to the to the file shosts in the
diretory .ssh, and write the IP address
of the host to the file.
Figure 40-10. Creating shosts
cp /etc/ssh/ssh_host_rsa_key.pub /.ssh/shosts
3 Create a list of IP addresses and usernames that are permitted to SSH in a file called rhosts, as shown in
Figure 40-11.
Figure 40-11. Creating rhosts
4 Copy the file shosts and rhosts to the Dell Force10 system.
5 Disable password authentication and
RSA authentication, if configured
• no ip ssh password-authentication
• no ip ssh rsa-authentication
• CONFIGURATION
• EXEC Privilege
6 Enable host-based authentication. ip ssh hostbased-authentication enable CONFIGURATION
7 Bind shosts and rhosts to host-based
authentication.
ip ssh pub-key-file flash://filename
ip ssh rhostsfile flash://filename
CONFIGURATION
admin@Unix_client# cd /etc/ssh
admin@Unix_client# ls
moduli sshd_config ssh_host_dsa_key.pub ssh_host_key.pub
ssh_host_rsa_key.pub ssh_config ssh_host_dsa_key ssh_host_key
ssh_host_rsa_key
admin@Unix_client# cat ssh_host_rsa_key.pub
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEA8K7jLZRVfjgHJzUOmXxuIbZx/
AyWhVgJDQh39k8v3e8eQvLnHBIsqIL8jVy1QHhUeb7GaDlJVEDAMz30myqQbJgXBBRTWgBpLWwL/
doyUXFufjiL9YmoVTkbKcFmxJEMkE3JyHanEi7hg34LChjk9hL1by8cYZP2kYS2lnSyQWk=
admin@Unix_client# ls
id_rsa id_rsa.pub shosts
admin@Unix_client# cat shosts
10.16.127.201, ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEA8K7jLZRVfjgHJzUOmXxuIbZx/AyW
hVgJDQh39k8v3e8eQvLnHBIsqIL8jVy1QHhUeb7GaDlJVEDAMz30myqQbJgXBBRTWgBpLWwL/
doyUXFufjiL9YmoVTkbKcFmxJEMkE3JyHanEi7hg34LChjk9hL1by8cYZP2kYS2lnSyQWk=
admin@Unix_client# ls
id_rsa id_rsa.pub rhosts shosts
admin@Unix_client# cat rhosts
10.16.127.201 admin