CC攻击防护的asp代码

<%
Dim fsoObject
Dim tsObject
dim file
if Request.ServerVariables("HTTP_X_FORWARDED_FOR")="" then
response.write "系统维护中"
response.end
end if
Set fsoObject = Server.CreateObject("scripting.FileSystemObject")
file = server.mappath("CCLog.txt")
if not fsoObject.fileexists(file) then
fsoObject.createtextfile file,true,false
end if
set tsObject = fsoObject.OpenTextFile(file,8)
tsObject.Writeline Request.ServerVariables("HTTP_X_FORWARDED_FOR")&"["&Request.ServerVariables("REMOTE_ADDR")&"]"&now()
Set fsoObject = Nothing
Set tsObject = Nothing
response.write "系统维护中."
%>