WordPress folder is accessible by anyone

Hello All,

I have installed wordpress in a separate folder at my site and my blog is running at root.

wwww.mysite.com/wordpress/- wordpress installation

http://www.mysite.com/ – Blog url.

Now, wwww.mysite.com/wordpress/ is accessible from browser. How can I restrict user to view it? I guess that this issue may be because of folder permission, but I am not sure which permission should I assign to wordpress folder.

Thanks.

asony