服务端获取
//方法一
HttpContext.Current.Request.UserHostAddress; //方法二
HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];//方法三
string strHostName = System.Net.Dns.GetHostName();
string clientIPAddress = System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();//方法四（无视代理）
HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];//方法五
if(Context.Request.ServerVariables["HTTP_VIA"]!=null) // using proxy
{ ip=Context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();  // Return real client IP.
}
else// not using proxy or can't get the Client IP
{ ip=Context.Request.ServerVariables["REMOTE_ADDR"].ToString(); //While it can't get the Client IP, it will return proxy IP.
}客户端获取
//方法六
var ip = '<!--#echo var="REMOTE_ADDR"-->';
alert("Your IP address is "+ip);//方法七（无视代理）
function GetLocalIPAddress()
{ var obj = null; var rslt = ""; try { obj = new ActiveXObject("rcbdyctl.Setting"); rslt = obj.GetIPAddress; obj = null; } catch(e) { //
    } return rslt;
} 

        protected void Page_Load(object sender, EventArgs e){//获取服务器名this.serverName.Text = "http://" + Request.Url.Host;//获取服务器IPthis.serverIP.Text = Request.ServerVariables.Get("Local_Addr").ToString();//获取服务器操作系统版本this.serverSystem.Text = GetSystem();//获取管理系统当前目录this.serverPath.Text = Request.PhysicalApplicationPath;//获取服务器IIS版本this.serverIIS.Text = Request.ServerVariables["SERVER_SOFTWARE"].ToString();//获取服务器当前时间this.serverDate.Text = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");//检测IE版本RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Internet Explorer\Version Vector");this.serverIE.Text = key.GetValue("IE", "未检测到").ToString();//检测访问端口this.serverPort.Text = Request.ServerVariables.Get("Server_Port").ToString();}/// <summary>/// 获取操作系统版本/// </summary>/// <returns></returns>private string GetSystem(){string system = Request.ServerVariables.Get("HTTP_USER_AGENT").ToString();string tmpSys = string.Empty;if (system.IndexOf("NT 4.0")>0){tmpSys = "Windows NT 4.0";}else if (system.IndexOf("NT 5.0")>0){tmpSys = "Windows NT 5.0";}else if (system.IndexOf("NT 6.1")>0){tmpSys = "Windows NT 6.1";}else{tmpSys = "未检测到操作系统信息！";}return tmpSys;}

3.获取服务器信息       Label1.Text = "服务器名称："+Server.MachineName;//服务器名称  Label2.Text = "服务器IP地址：" + Request.ServerVariables["LOCAL_ADDR"];//服务器IP地址  Label3.Text = "服务器域名：" + Request.ServerVariables["SERVER_NAME"];//服务器域名  Label4.Text = ".NET解释引擎版本：" + ".NET CLR" + Environment.Version.Major + "." + Environment.Version.Minor + "." + Environment.Version.Build + "." + Environment.Version.Revision;//.NET解释引擎版本  Label5.Text = "服务器操作系统版本：" + Environment.OSVersion.ToString();//服务器操作系统版本  Label6.Text = "服务器IIS版本：" + Request.ServerVariables["SERVER_SOFTWARE"];//服务器IIS版本  Label7.Text = "HTTP访问端口：" + Request.ServerVariables["SERVER_PORT"];//HTTP访问端口  Label8.Text = "虚拟目录的绝对路径：" + Request.ServerVariables["APPL_RHYSICAL_PATH"];//虚拟目录的绝对路径  Label9.Text = "执行文件的绝对路径：" + Request.ServerVariables["PATH_TRANSLATED"];//执行文件的绝对路径  Label10.Text = "虚拟目录Session总数：" + Session.Contents.Count.ToString();//虚拟目录Session总数  Label11.Text = "虚拟目录Application总数：" + Application.Contents.Count.ToString();//虚拟目录Application总数  Label12.Text = "域名主机：" + Request.ServerVariables["HTTP_HOST"];//域名主机  Label13.Text = "服务器区域语言：" + Request.ServerVariables["HTTP_ACCEPT_LANGUAGE"];//服务器区域语言  Label14.Text = "用户信息：" + Request.ServerVariables["HTTP_USER_AGENT"];  Label14.Text="CPU个数："+Environment.GetEnvironmentVariable("NUMBER_OF_PROCESSORS");//CPU个数  Label15.Text = "CPU类型：" + Environment.GetEnvironmentVariable("PROCESSOR_IDENTIFIER");//CPU类型  Label16.Text = "进程开始时间：" + GetPrStart();//进程开始时间  Label17.Text = "AspNet 内存占用：" + GetAspNetN();//AspNet 内存占用  Label18.Text = "AspNet CPU时间：" + GetAspNetCpu();//AspNet CPU时间  Label19.Text = "FSO 文本文件读写：" + Check("Scripting.FileSystemObject");//FSO 文本文件读写  Label20.Text = "应用程序占用内存" + GetServerAppN();//应用程序占用内存