ISA only letting me on the Internet

[mrforgetful]

I'm having a very strange problem.

 

I, as you can see, can access the Internet fine, although the ISA Client in the System Tray does have a red X on it.

 

Noone else can go on the Internet at all, they just receive a 'Internet Explorer cannot display the webpage' error.

 

Looking at the ISA Sessions also only lists myself, noone else.

[mrforgetful]

Fixed, DNS records had gone, long story.