At work you should be able to log in to your IP address to see your DVR.
While at home, go to your computer and go to
www.ipchicken.com Write that number down and that will be the number that you need log in to at work. Have a computer friend look at your router set up. There may be something like "block unrequested IP" or something like that in the router options. Make sure your port has been opened on your router.
With a Mac you can log in to your DVR using quick time.
The smart phone that is logging in via Wi Fi is just connecting on the local internet of the router. If it does not connect through the world wide web then you may have router issues.
The Iphone does not have active x and therefore it needs the eagle eyes software to work.