Jun 10

If you receive the following error, ‘Error: sec_error_reused_issuer_and_serial’, in Firefox when attempting to connect to a Cisco PIX or ASA firewall, connect to the firewall via the console or SSH and issue the following commands in configuration mode:

ca zeroize rsa
ca generate rsa key

where is 512, 1024, or whatever bit-size you feel that the key should be (I would suggest 1024).

The key will be re-generated and you should be able to connect to the firewall and launch PDM or ASDM via the browser.

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