weird internet connection problem

I have 2-3 comps conncted via LAN . On the main compuer which is connected to the internet , all sites open fine with ease.
On other computer , only google.com opens , and no other sites like Yahoo.com or Flashkit.com opens .
However in google , i can run a search which will display latest results .
So what could be the problem ... ?? :confused:

what's your DNS server on these other machines? Is it the absolute same as your machine that's doing the sharing?