Is it possible to hack a website and change its settings?

Im just wondering, because i have a site and i want to hacker-proof itIs it possible to hack a website and change its settings?yes this is possible and it has been done!!! just make sure that you create a double password for your site in which only you have and copy of the direct link to this pass word so that only you and maybe your site staff can have!!! its hard to crack trough a double password key guard. take Google they have 7 and only one has been crack. the more the better