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Defeating Cisco IOU’s License Protection

by Jeremy L. Gaddis on January 9, 2011 · 23 comments

in Off-topic

Cisco’s IOS-On-UNIX (IOU) images are protected by a licensing mechanism requiring that users generate a valid license from an internal Cisco website.

Users must first obtain a “key” that is based off of a machine’s hostname and IP address and provide this key when obtaining a license. Because of the use of the hostname and IP address when calculating the key, it should be impossible to use the application on another machine without obtaining a new license. (See also my IOU FAQ.)

UPDATE: Youtube has removed the original video. You can now view the video on the Cisco IOU Licensing page of Free CCNA Labs, another website of mine.

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