Reference Guide

498 | Security
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To configure host-based authentication, use the following steps:
Step Task Command Syntax Command Mode
1 Configure RSA Authentication. Refer to 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 28-12).
Figure 28-12. 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 (Figure 28-13).
Figure 28-13. 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/
admin@Unix_client# ls
id_rsa id_rsa.pub rhosts shosts
admin@Unix_client# cat rhosts
10.16.127.201 admin