My Z100G is doing it's job but I would like to fix the root cause.
Really not certain what you are asking here. The root cause is it is trying to "contact" your computer and your Z100G is doing what it is supposed to do, block it. If this website is being blocked then you are correct it is doing it's job, don't really think there is anymore that can be done. Here is a link which tells what this is;
http://www.aboutus.org/Tqlkg.com