1. 获取客户端IP 和MAC (用脚本语言实现) , 该方法已测试通过. 缺点: 需要将站点设置为受信任站点 或通过设置IE 启用ActiveX控件

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
  <HEAD>
    <TITLE>WMI Scripting HTML</TITLE>
     <META http-equiv=Content-Type content="text/html; charset=gb2312">
      <SCRIPT language=JScript event="OnCompleted(hResult,pErrorObject, pAsyncContext)" for=foo>
        document.forms[0].txtMACAddr.value=unescape(MACAddr);
        document.forms[0].txtIPAddr.value=unescape(IPAddr);
        document.forms[0].txtDNSName.value=unescape(sDNSName);
       //document.formbar.submit();
      </SCRIPT>
     
    <SCRIPT language=JScript event=OnObjectReady(objObject,objAsyncContext) for=foo>
     if(objObject.IPEnabled != null && objObject.IPEnabled != "undefined" && objObject.IPEnabled == true)
     {
       if(objObject.MACAddress != null && objObject.MACAddress != "undefined")
       MACAddr = objObject.MACAddress;

       if(objObject.IPEnabled && objObject.IPAddress(0) != null && objObject.IPAddress(0) != "undefined")
       IPAddr = objObject.IPAddress(0);

      if(objObject.DNSHostName != null && objObject.DNSHostName != "undefined")
      sDNSName = objObject.DNSHostName;
     }
    </SCRIPT>
   <META content="MSHTML 6.00.3790.0" name=GENERATOR></HEAD>
   <BODY>
    <OBJECT id=locator classid=CLSID:76A64158-CB41-11D1-8B02-00600806D9B6 VIEWASTEXT></OBJECT>
    <OBJECT id=foo classid=CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223></OBJECT>
     <SCRIPT language=JScript>
       var service = locator.ConnectServer();
       var MACAddr ;
       var IPAddr ;
       var DomainAddr;
       var sDNSName;
       service.Security_.ImpersonationLevel=3;
       service.InstancesOfAsync(foo, 'Win32_NetworkAdapterConfiguration');
     </SCRIPT>
      <FORM id=formfoo name=formbar action=NICPost.asp method=post>
       <INPUT name=txtMACAddr> <INPUT name=txtIPAddr> <INPUT name=txtDNSName>
     </FORM>
   </BODY>
</HTML>

2. 获取客户端IP 和MAC (用C#语言实现)

//获取IP
string ip =  Page.Request.UserHostAddress;

//获取Mac (调用API) 该方法未测试: 缺点:只能获取到同一网段或没有经过任何路由的终端的MAC地址

[DllImport("Iphlpapi.dll")]
  public static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);
  //dest为目标机器的IP;Host为本机器的IP

  [DllImport("Ws2_32.dll")]
  public static extern Int32 inet_addr(string ip);

  public string GetMac(string strIp)  说明;strIp 即客户端Ip 上面已提上获取方法
  {
   try
   {
    IPHostEntry host = Dns.GetHostByName(System.Environment.MachineName);
    Int32 local = inet_addr(host.AddressList[0].ToString());
    Int32 remote = inet_addr(strIp);

    Int64 macinfo = new Int64();
    Int32 length = 6;
    SendARP(remote, local, ref macinfo, ref length);

    string temp = System.Convert.ToString(macinfo, 16).PadLeft(12, '0').ToUpper();

    StringBuilder strReturn = new StringBuilder();
    int x = 12;
    for(int i=0;i<6;i++)
    {
     strReturn.Append(temp.Substring(x-2, 2));
     x -= 2;
    }

    return strReturn.ToString();
   }
   catch(Exception error)
   {
    throw new Exception(error.Message);
   }
  }


//以上方法 改进后的（已通过测试）: 优点: 能跨网段获取Mac; 缺点; 若存在防火墙,不能获取到Mac, 同时当应用于外网时获取ip可能不唯一

public static string GetNetCardAddress2(string strIp)
  {
   string mac = "";

   System.Diagnostics.Process process = new System.Diagnostics.Process();
   process.StartInfo.FileName = "nbtstat";
   process.StartInfo.Arguments = "-a "+strIp;
   process.StartInfo.UseShellExecute = false;
   process.StartInfo.CreateNoWindow = true;
   process.StartInfo.RedirectStandardOutput = true;
 
   process.Start();
 
   string output = process.StandardOutput.ReadToEnd();
   int length = output.IndexOf("MAC Address = ");

   if(length>0)
   {
    mac = output.Substring(length+14, 17);
   }
 
   process.WaitForExit();
 
   return mac.Replace("-", "").Trim();
  }