Hi Subhash,
I fully understand your problem but you only accept a full answer that is suitable for your environment.
Well, read again. You should read/study the robots.txt information and use that knowledge in your network.
I will NOT provide you a fully configured robots.txt and that seems to be the only thing you are willing to see from us.
There is a part that you need to do yourself as each network administrator is having a different environment.
Well, 2 things you can do now, read/study more and do something, or just wait untill some-one gives you a fully configured robots.txt (Which I don't think will happen at all)
I rest my case, I helped enough. :classic2:
Good luck with your server.
Kind regards,
PaulP.