用ASP做的DNS LOOKUP程序

文章转译自ASP101
运行环境，NT（SERVER、WORKSTATION）、W2K
服务器上需要安装WSH2.0或者更高版本
如果您的系统目前没有安装WSH2.0，您可以从以下这个地址去下载它
http://www.microsoft.com/msdownload/vbscript/scripting.asp
里面包含了WSH2.0
下面是源代码
<%@ Language="VBScript" %>
<% Option Explicit %>
<%
If Request.Form("frmHost") = "" Then
'设置初始值
strIP = Request.ServerVariables("REMOTE_ADDR")
Else
strIP = Request.Form("frmHost")
End If
%>

Host:
value="<%= strIP %>">
value="Lookup" onClick="document.frmRDNS.submit()">

<%
rMethod = uCase(Request.ServerVariables("REQUEST_METHOD"))
If rMethod = "POST" Then
' Lookup Host
strReturn = nsLookup(strIP)
If strReturn <> "" Then
Response.Write strReturn
Else
' A Lame Host is any Valid Host that DNS Cannot Resolve
' See InterNic for Details
Response.Write "Lame Host - Could Not Resolve DNS For " _
& strIP & "
"
End If
End If
Function NSlookup(strHost)
'Create Shell Object
Set oShell = Server.CreateObject("Wscript.Shell")
'Run NSLookup via Command Prompt
'Dump Results into a temp text file