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Dell PowerEdge M1000e Chassis Management Controller Firmware Version 5.1 User’s Guide

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Configure Public Key Authentication over SSH

You can configure up to 6 public keys that can be used with the service username over SSH interface. Before adding or deleting public keys, be sure to use the view command to see what keys are already set up so that a key is not accidentally overwritten or deleted. The service username is a special user account that can be used when accessing the CMC through SSH. When the PKA over SSH is set up and used correctly, you need not enter username or passwords to log in to the CMC. This can be very useful to set up automated scripts to perform various functions.
  • NOTE: There is no GUI support for managing this feature; you can only use RACADM.

When adding new public keys, ensure that the existing keys are not already at the index where the new key is added. CMC does not perform checks to ensure previous keys are deleted before a new one is added. As soon as a new key is added, it is automatically in effect as long as the SSH interface is enabled.

When using the public key comment section of the public key, remember that only the first 16 characters are utilized by the CMC. The public key comment is used by the CMC to distinguish SSH users when using the RACADM getssninfo command since all PKA users use the service username to log in.

For example, if two public keys are set up one with comment PC1 and one with comment PC2: 
racadm getssninfo
                                 Type       User  IP Address  Login
                                 Date/Time
                                 SSH        PC1   x.x.x.x     06/16/2009
                                 09:00:00
                                 SSH        PC2   x.x.x.x     06/16/2009
                                 09:00:00
For more information on the sshpkauth, see the Chassis Management Controller for Dell PowerEdge M1000e RACADM Command Line Reference Guide .

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