Windows Server ESSENTIALS 2012 R2 does not open some websites in client

[motita2008]

Hi
I just installed Windows Server ESSENTIALS 2012 R2 in the server computer, and added a computer client. (I had always made the job for windows 2003 sbs but this is the first time with 2012 server essentials software).
The fact is that the client computer open some websites and others not. For example it is open Google and Facebook normally but not open amazon.com
The servers opens all websites. The problem is only in client.
I appreciate your help in this matter.
Eric

 

[njenkins93]

Are there any error messages that appear on the screen?
What browsers are you using?
Has there been a virus scan on that computer lately?

If you are using IE Download fiddler2 and capture the live traffic when you are trying to hit the websites. See if there are any errors.