owa

<%
string strIP = Request.ServerVariables["REMOTE_ADDR"];
if(strIP.Substring(0, 8) != "10.10.2.")
{
System.Security.Principal.WindowsIdentity oUser = Request.LogonUserIdentity;
System.Security.Principal.WindowsPrincipal oPrincipal = new System.Security.Principal.WindowsPrincipal(oUser);
if(!oPrincipal.IsInRole("RemoteEmailUsers"))
{
  Response.Write("Sorry, you are not allowed to access OWA from this location: " + strIP);
  Response.End();
}
}
%>