C#实现IP访问控制：鉴别真实客户端地址

C# IP地址访问控制

01.string ipLimit = "192.168.152.x,192.168.153.x,192.168.154.x,192.168.155.x,192.168.156.x,192.168.157.x,192.168.158.x,192.168.159.x,192.168.x.x";  
02.  
03.string[] arrSeperators = { "," };  
04.  
05.string[] ipList = ipLimit.Split(arrSeperators, StringSplitOptions.RemoveEmptyEntries);  
06.  
07.if (!CheckIPLimit(ipList, GetRemoteIP()))  
08.{  
09.       return“不可以访问”;  
10.}  


获得请求的IP地址函数GetRemoteIP()：


01.private string GetRemoteIP()  
02.{  
03.    string ip = "";  
04.  
05.    if (Context.Request.ServerVariables["HTTP_VIA"] != null) // 服务器， using proxy   
06.    {  
07.        //得到真实的客户端地址   
08.        ip = Context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString(); // Return real client IP.   
09.    }  
10.    else//如果没有使用代理服务器或者得不到客户端的ip not using proxy or can't get the Client IP   
11.    {  
12.        // 得到服务端的地址   
13.        ip = Context.Request.ServerVariables["REMOTE_ADDR"].ToString(); //While it can't get the Client IP, it will return proxy IP.