iTunes not allowing sign in

Hey,

I have a iMac at my home and one at my office. Neither will allow me to sign into iTunes. I get the "network connection timed out" error. I have checked the server status, and everything is green. Obviously my internet connection is good since I am posting on here. I can access appleid.apple.com and can log in without a problem (from both of my machines).

Any idea what is going on?