<location path="SignUp.aspx">
    <system.web>
        <authorization>
            <allow users="?"/>
        </authorization>
    </system.web>
</location>
 
    <authentication mode="Forms">
        <forms name="AuthCookie" loginUrl="Login.aspx" timeout="60" 
                           defaultUrl="Index.aspx"/>
    </authentication>
    <authorization>
        <deny users="?"/>
    </authorization>