One easy way to solve this problem is applying javascript. It would not allow a person to go back to that page. But, is it a feasible solution? NO! One would like to go back, even after logout to see something. This javascript would disable to come back. So, that is not a proper solution.
So, here I am writing the proper code, which we finally found out and happy news is that, “It really works!”. So just follow this code.
If you applying a MasterPage, then copy these codes to its page load, or copy to that page’s load, which comes after login page or comes before logout page.

And on logout button click, write these codes.

So, if you still getting some kind of problem, please leave comment.
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