All traffic to and from Imagine Math is transmitted using the highest levels of encryption available, and unless noted in Imagine Math's Technical Specifications document will only go to the thinkthroughmath.com domain.
In order to improve application performance, Imagine Math uses the Amazon Cloudfront Content Delivery Network for static files such as images, PDFs, and the like. Our Cloudfront DNS aliases are:
https://content.thinkthroughmath.com -> is an alias for https://duni8xfq5pwee.cloudfront.net and is used for the math content images used in our product.
If you are having trouble loading images or styles in Imagine Math you may find that whitelisting https://d1u1lnfihlxz3u.cloudfront.net and https://duni8xfq5pwee.cloudfront.net will solve the problem. These subdomains are only for Imagine Math use and no non-Imagine Math content will be served from them.