Place the code below at the beginning of your .ASP home page. If you do not have a home page using ASP create a text file, place the code in it and save it as default.asp.
*remember to replace the "domainname.com" with your actual domain name.
<%
ServerName = Request.ServerVariables("SERVER_NAME")
SecurePort = Request.ServerVariables("HTTPS")
'response.write ServerName & "<<<br>" ' Response domain
'response.write SecurePort & "<<<br>" ' Response is on or off
If InStr(1, SecurePort, "off", vbTextCompare) = 1 Then
Response.Redirect "https://www.domainname.com"
End If
%>