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Not able to connect to the ASA after a flash memory upgrade

Core issue

This can happen if the Rivest, Shamir, and Adelman (RSA) keys are corrupted.

Resolution

In order to resolve this issue and gain Secure Shell (SSH) access to ASA, regenerate the RSA keys. Use these commands in the global config mode:

  1. asa(config)#crypto key zeroize rsa

    This command removes all RSA key pairs.


  2. asa(config)#crypto key generate rsa

    This command generates the new key and specifies RSA as the key type.


  3. asa(config)#ca save all

    This command saves the keys.

Refer to PIX/ASA 7.x: SSH on the Inside and Outside Interface Configuration Example for more information

Version history
Revision #:
1 of 1
Last update:
‎06-17-2009 10:15 PM
Updated by:
 
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