客户端ip:
Request.ServerVariables.Get("Remote_Addr").ToString();
客户端主机名:
Request.ServerVariables.Get("Remote_Host").ToString();
客户端浏览器IE：
Request.Browser.Browser;
客户端浏览器 版本号：
Request.Browser.MajorVersion;
客户端操作系统：
Request.Browser.Platform;
服务器ip:
Request.ServerVariables.Get("Local_Addr").ToString();
服务器名：
Request.ServerVariables.Get("Server_Name").ToString();
如果你想进一步了解ServerVariables，可以用
foreach(String o in Request.ServerVariables){
Response.Write(o+"="+Request.ServerVariables[o]+"<br>");
}
string stringMAC = "";
   string stringIP = "";
   ManagementClass MC = new ManagementClass ("Win32_NetworkAdapterConfiguration");
   ManagementObjectCollection MOC= MC.GetInstances();
   foreach(ManagementObject MO in MOC)
   {
    if ((bool)MO["IPEnabled"] == true)
    {
       stringMAC += MO["MACAddress"].ToString(); //获取网卡的地址
       string[] IPAddresses = (string[]) MO["IPAddress"]; //获取本地的IP地址
       if(IPAddresses.Length > 0)
       stringIP = IPAddresses[0];
       Response.Write(stringMAC+"/"+stringIP);
     }
   }
asp.net+c#如何获取客户端网卡的MAC地址？
//要引用到以下两个命名空间
using System.Diagnostics;
using System.Text.RegularExpressions;
//获取远程客户端的网卡物理地址（MAC）
public string GetMac(string IP)   //para IP is the client's IP
{
string dirResults="";
ProcessStartInfo psi = new ProcessStartInfo();
Process proc = new Process();
psi.FileName = "nbtstat";
psi.RedirectStandardInput = false;
psi.RedirectStandardOutput = true;
psi.Arguments = "-A " + IP;
psi.UseShellExecute = false;
proc = Process.Start(psi);
dirResults = proc.StandardOutput.ReadToEnd();
proc.WaitForExit();
dirResults=dirResults.Replace("\r","").Replace("\n","").Replace("\t","");
Regex reg=new Regex("Mac[ ]{0,}Address[ ]{0,}=[ ]{0,}(?<key>((.)*?))__MAC",RegexOptions.IgnoreCase|RegexOptions.Compiled);
Match mc=reg.Match(dirResults+"__MAC");
if(mc.Success)  
{
return mc.Groups["key"].Value;
}
else
{
reg=new Regex("Host not found",RegexOptions.IgnoreCase|RegexOptions.Compiled);
mc=reg.Match(dirResults);
if(mc.Success)
{
return "Host not found!";
}
else
{
return "";
}
}
}
//在页面上打印出客户端的网卡物理地址（MAC）
Response.Write(this.GetMac(Request.UserHostAddress.ToString()));
 获取cpu序列号,硬盘ID,网卡MAC地址
private void GetInfo()
  {
   string cpuInfo = "";//cpu序列号
   ManagementClass cimobject = new ManagementClass("Win32_Processor");
   ManagementObjectCollection moc = cimobject.GetInstances();
   foreach(ManagementObject mo in moc)
   {
    cpuInfo = mo.Properties["ProcessorId"].Value.ToString();
    Response.Write ("cpu序列号："+cpuInfo.ToString ());
   }
   //获取硬盘ID
   String HDid;
   ManagementClass cimobject1 = new ManagementClass("Win32_DiskDrive");
   ManagementObjectCollection moc1 = cimobject1.GetInstances();
   foreach(ManagementObject mo in moc1)
   {
    HDid = (string)mo.Properties["Model"].Value;
    Response.Write ("硬盘序列号："+HDid.ToString ());
   }

//获取网卡硬件地址
   ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
   ManagementObjectCollection moc2 = mc.GetInstances();
   foreach(ManagementObject mo in moc2)
   {
    if((bool)mo["IPEnabled"] == true)
     Response.Write("MAC address\t{0}"+mo["MacAddress"].ToString());
    mo.Dispose();
   }
  }