Follow these instructions if you are unable to activate your Tobii software due to Firewall restrictions:

Try to open this website http://updateservice.tobii.org with a regular internet browser. If it is loading the page and you can see a table with software products, your internet connection is ok.
If you cannot see it, make sure both your computer and network firewall allow traffic to http://updateservice.tobii.org. It is regular http traffic; no ports are required.
(Whitelist www.mytobiidynavox.com).
Devices will need HTTP (port 80) at Mytobiidynavox.com.
To access Mytobiidynavox.com in a web browser, it also requires HTTPS (port 443).