I've tried to download TTU 15 Installer from https://downloads.teradata.com/download/tools/tera
which leads to d289lrf5tw1zls.cloudfront.net
Which is blocked by Norton:
I have McCafee. What I did was , I disable the anti-virus software :). It is there in the icon , next to time icon. Once that is disabled, I downloaded what I wanted. Then I switch on the anti-virus again. This is in my personal laptop.
If you are in an organization, you have to pass through their policies. You have to raise ticket or get it through technical support team.
If we are working in an organization, and it is blocked by Security admin, we can't help.
As for Norton and outside, let TD Website team decide maybe :)