Of course they do everything to block downloading these courses!
If you were able to simply download the entire course, then you would be able to pass it to other people for free or you could even try to resell it for a few bucks. Producing such content consumes a lot of resources hence Cisco wants their customers to pay for access.
So use those 180 days as good as you can, study hard and take a lot of notes to make the most out of it.
Good luck with your studies!