how do we stop from users making a mistake and  mistakenly type in wrong category name? Ex/ http://www.dotnetnuke.com/Anyfoldername/tabid/799/Default.aspx returns a valid 200 header, which is wrong, it should return a valid 404 page. I need a way that dotnetnuke outputs one absolute url, which anyway changed in url shd be causing a 404 error.

Thanks,

i have found one link http://www.wwwcoder.com/main/parentid/263/site/2295/68/default.aspx

as per the article code

Option Strict On
Imports System.Data
Imports System.Configuration

Public Class _404Handler
    Inherits System.Web.UI.Page

#Region " Web Form Designer Generated Code "
#End Region

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As _
                 System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here
        Try
            Dim strQuery As String = Request.ServerVariables("QUERY_STRING")
            If strQuery <> "" Then
                'Now we'll remove the stuff we don't need.
                strQuery = strQuery.Replace("404;http://", "")
                'Get rid of the domain name since we're dealing with multiple domains.
                Dim intSlashPosition As Integer = strQuery.IndexOf("/")
                strQuery = strQuery.Remove(0, intSlashPosition)
                ' now do a lookup in our table to find out if there is a related page.
                Dim NewURL As Integer = DoURLLookup(strQuery)
                If NewURL <> -1 Then
                    Response.Redirect("/DesktopDefault.aspx?TabID=" & NewURL.ToString)
                Else
                    'if we don't have any, just send them to the home page of the site.
                    Response.Redirect("/")
                End If
            Else
                Response.Redirect("/")
            End If
        Catch ex As Exception
            Response.Redirect("/")
        End Try
    End Sub
   
    'This function performs the lookup in the database to find a related page for the broken link.
    Function DoURLLookup(ByVal inURL As String) As Integer
        Dim cnn As New SqlConnection(ConfigurationSettings.AppSettings("connectionString").ToString)
        Dim myCommand As SqlCommand = New SqlCommand("SELECT NewTabID FROM " & _
             "NotFoundLookup WHERE OldURL = '" & Replace(inURL, "'", "''") & "'", cnn)
        cnn.Open()
        Dim result As SqlDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)
        If result.Read Then
            Dim TabID As Integer = CType(result("NewTabID"), Integer)
            cnn.Close()
            Return TabID
        Else
            cnn.Close()
            Return -1
        End If
    End Function

End Class

if we  change on UrlRewriteModule.vb file

            ' if a match was found to the urlrewrite rules
            If intMatch <> -1 Then
                If rules(intMatch).SendTo.StartsWith("~") Then
                    ' rewrite the URL for internal processing
                    RewriterUtils.RewriteUrl(app.Context, sendTo)
                Else
                    ' it is not possible to rewrite the domain portion of the URL so redirect to the new URL
                    Response.Redirect(sendTo, True)  // Replace with 404.aspx page
                End If
            End If

i have not implited this code.

Is that  possible to Redicrect on 404 Error page if URL not or found?