Add this script on your default page.
<script language="javascript" type="text/javascript">
var Yoururl = location.href;
if (Yoururl.toLowerCase() == "http://www.YourDomainName.com/default.aspx" || Yoururl.toLowerCase() == "http://www.YourDomainName.com/#") {
window.location = "http://www.YourDomainName.com";
}
</script>