求asp程序利用IP判断是否允许访问的程序

<%
Const BadIPGroup = "1.1.1.1|1.1.1.1" '封锁固定的IP。
If IsForbidIP(BadIPGroup) = True Then
response.redirect "index_dizhen.asp" '跳转到制定网页
Response.End
End If
'****************************************************************
'参数vBadIP：要屏蔽的IP段,IP地址集合，用|符号分隔多个IP地址(段)
'返回Bool：True用户IP在被屏蔽范围，False 反之
'****************************************************************
Function IsForbidIP(vBadIP)
Dim counter, arrIPPart, arrBadIP, arrBadIPPart, i, j
arrBadIP = Split(vBadIP, "|")
arrIPPart = Split(GetUserIP(), ".")
For i = 0 To UBound(arrBadIP)
counter = 0
arrBadIPPart = Split(arrBadIP(i), ".")
For j = 0 To UBound(arrIPPart)
If (arrBadIPPart(j)) = "*" or Cstr(arrIPPart(j)) = Cstr(arrBadIPPart(j)) Then
counter = counter + 1
End If
Next
If counter = 4 Then
IsForbidIP = True
Exit Function
End If
Next
IsForbidIP = False
End Function
'***************
'返回客户IP地址
'***************
Function GetUserIP()
Dim IP
IP = Request.ServerVariables("HTTP_X_FORWARDED_FOR")
If IP = "" Then IP = Request.ServerVariables("REMOTE_ADDR")
GetUserIP = IP
End Function
%>

<%
function get_ip() '获得来访客户端的IP
cliip=Request.ServerVariables("HTTP_X_FORWARDED_FOR")
if cliip="" Then cliip=Request.ServerVariables("REMOTE_ADDR")
get_ip=cliip
end function
set rs=conn.execute("select ip from ip where ip='"&get_IP()&"'")
if rs.eof and rs.bof then response.redirect("指定禁止访问的页面地址") '如果客户端IP不被允许则跳转指定页面
rs.close
set rs=nothing
%>