>>Why do you want to do this? Is your computer infested with adware that is trying to download ads from certain servers? If so you should remove the adware.
>>
>>If for some other reason you want to disable access to various IP addresses one flexible option is to use a firewall such as ZoneAlarm (yes, firewalls can limit outgoing, as well as incoming, access).
>
>Hi,
>Thanx for the reply.
>
>Why i would like to blok it is it contains mostly ads. and here in India the dialup bandwidth is damn slow. I dont want to waste time and bandwidth trying to load those . Thats the basic idea.
>
>I use Zonealarm basic as the fire wall and i did not see any way to block specific IP address ( a out going call). can U please explain how can i achive it ?

You may need the Pro version of ZoneAlarm for that level of control.

There are other firewalls that can be downloaded at http://www.download.com/3120-20_4-0.html?qt=firewall&tg=dl-2001&search.x=0&search.y=0&search=+Go%21+

If you Google ["ad blocking" hosts file] (without the square brackets) you can download various HOSTS files specifically designed to block ads.