The CTO has told you what they don't allow, but he hasn't told you what they do allow. Note the word "allow". It suggests "policy", and policies can often be influenced (i.e., changed) in response to business needs. If your business need involves adding dynamic web content to their web server, and they don't allow that, then this may need to get escalated to (I'm guessing) the sponsor of the "CBOT investors floor" project so that they can influence policy at a higher level (e.g., by negotiating with the CTO or the CTO's boss).

A good next step is to explain to the CTO what your project needs are, and ask him to suggest options. This puts him in the position of working with you, rather than blocking you. He's already given you the opening by asking what you're trying to accomplish. Take that opening.