Sites like Toolzz.com and ISATools.org provide Ads sites blocking lists to be used with ISA server. My question is that if these ads feteched from their respective sites but are blocked by ISA to eneter the inside network or no request is sent to the blocked ADs sites and so they are not feteched. If the former is yes, then ISA does not help in saving the bandwidth used for internet access rather it saves bandwidth of the inside network- LAN. Please someone clarify this point.