Concept Guide

[no] ip ssh server dns enable
To disable the DNS in the SSH server conguration, use the no version of this command.
Example of DNS Conguration in SSH Server Connections
To view the status of DNS in the SSH server conguration, use the show running-config ip ssh command from EXEC mode.
DellEMC#show running-config ip ssh
!
ip ssh server dns enable
ip ssh hostbased-authentication enable
no ip ssh password-authentication enable
ip ssh server enable
Secure Shell Authentication
Secure Shell (SSH) is enabled by default using the SSH Password Authentication method.
Enabling SSH Authentication by Password
Authenticate an SSH client by prompting for a password when attempting to connect to the Dell EMC Networking system. This setup is
the simplest method of authentication and uses SSH version 2.
To enable SSH password authentication, use the following command.
• Enable SSH password authentication.
CONFIGURATION mode
ip ssh password-authentication enable
Example of Enabling SSH Password Authentication
To view your SSH conguration, use the show ip ssh command from EXEC Privilege mode.
DellEMC(conf)#ip ssh server enable
DellEMC(conf)#ip ssh password-authentication enable
DellEMC# show ip ssh
SSH server : enabled.
SSH server version : v2.
SSH server vrf : default.
SSH server ciphers : 3des-cbc,aes128-cbc,aes192-cbc,aes256-cbc,aes128-ctr,aes192-
ctr,aes256-ctr.
SSH server macs : hmac-md5,hmac-md5-96,hmac-sha1,hmac-sha1-96,hmac-sha2-256,hmac-
sha2-256-96.
SSH server kex algorithms : diffie-hellman-group-exchange-sha1,diffie-hellman-group1-
sha1,diffie-hellman-group14-sha1.
Password Authentication : enabled.
Hostbased Authentication : disabled.
RSA Authentication : disabled.
Vty Encryption HMAC Remote IP
Using RSA Authentication of SSH
The following procedure authenticates an SSH client based on an RSA key using RSA authentication. This method uses SSH version 2.
1 On the SSH client (Unix machine), generate an RSA key, as shown in the following example.
2 Copy the public key id_rsa.pub to the Dell EMC Networking system.
3 Disable password authentication if enabled.
CONFIGURATION mode
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