ISA questions

Hi
 
I just installed an ISA server and I am wondering why some computers can
access to the internet even that they don?t have installed de fire-wall
client. I want to restrict some users to navigate, how can I do this?
 
I also want to know how can I log every site visited for each user?how
can I accomplish this
 
Thanks in advance for all your help 
 
Víctor 


 

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