This post is part of a series on configuring Cisco ASA 5510 firewalls Please browse our website to see what we offer – thanks, and enjoy the blog We cover Derby and Derbyshire, Nottingham and Nottinghamshire mainly, but do also have clients further afield. The scenario: I recently acquired a used ASA 5510 from another internal department, but the login details had been lost along the way. So I had a perfectly functional firewall, but no way to reconfigure it to my needs. So, I needed a way to get into the ASA, and reset the password. Although, as the configuration that’s already there was of no use to me, I just removed the config entirely. In brief, this process involves booting the appliance, and then interrupting the boot process part way through.
We then change the configuration register, to force the appliance to ignore it’s saved config.
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