simple 404 not found

So i changed
<form method="post" action="teste" class="login_form" accept-charset="utf-8">
<button>Entrar</button></form>
to
<form method="post" action="index.php/onekey/do_login" class="login_form" accept-charset="utf-8">

and its working now, but its not like it shud be. Any tips on how to config it? I didnt do any configuration on xamp