ASP和PHP限制IP访问 只允许指定IP访问 允许*号通配符过滤IP

/**

 * 检测访问的ip是否为规定的允许的ip

 * Enter description here ...

 */

function check_ip(){

    $ALLOWED_IP=array('192.168.2.*','127.0.0.1','192.168.2.49');

    $IP=getIP();

    $check_ip_arr= explode('.',$IP);//要检测的ip拆分成数组

    #限制IP

    if(!in_array($IP,$ALLOWED_IP)) {

        foreach ($ALLOWED_IP as $val){

            if(strpos($val,'*')!==false){//发现有*号替代符

                 $arr=array();//

                 $arr=explode('.', $val);

                 $bl=true;//用于记录循环检测中是否有匹配成功的

                 for($i=0;$i<4;$i++){

                     if($arr[$i]!='*'){//不等于*  就要进来检测，如果为*符号替代符就不检查

                         if($arr[$i]!=$check_ip_arr[$i]){

                             $bl=false;

                             break;//终止检查本个ip 继续检查下一个ip

                         }

                     }

                 }//end for 

                 if($bl){//如果是true则找到有一个匹配成功的就返回

                     return;

                     die;

                 }

            }

        }//end foreach

        header('HTTP/1.1 403 Forbidden');

        echo "Access forbidden";

        die;

    }

}

function getIP() {

    return isset($_SERVER["HTTP_X_FORWARDED_FOR"])?$_SERVER["HTTP_X_FORWARDED_FOR"]

    :(isset($_SERVER["HTTP_CLIENT_IP"])?$_SERVER["HTTP_CLIENT_IP"]

    :$_SERVER["REMOTE_ADDR"]);

}

 以下为ASP版:

<%

'受屏蔽IP地址(段)集合，星号为通配符，通常保存于配置文件中。

Const BadIPGroup = "192.168.1.*|202.68.*.*|*.12.55.34|185.*.96.24|127.*.0.1|192.168.0.1"

If IsForbidIP(BadIPGroup) = True Then

    Response.Write(GetIP &"IP地址禁止访问")

    Response.End()

End If



'参数vBadIP：要屏蔽的IP段,IP地址集合，用|符号分隔多个IP地址(段)

'返回Bool：True用户IP在被屏蔽范围，False 反之

Function IsForbidIP(vBadIP)

    Dim counter, arrIPPart, arrBadIP, arrBadIPPart, i, j

    arrBadIP = Split(vBadIP, "|")

    arrIPPart = Split(GetIP(), ".")

    For i = 0 To UBound(arrBadIP)

    counter = 0

    arrBadIPPart = Split(arrBadIP(i), ".")

    For j = 0 To UBound(arrIPPart)

    If(arrBadIPPart(j)) = "*" or Cstr(arrIPPart(j)) = Cstr(arrBadIPPart(j)) Then

    counter = counter + 1

    End If

    Next

    If counter = 4 Then

    IsForbidIP = True

    Exit Function

    End If

    Next

    IsForbidIP = False

End Function



''返回客户IP地址

Function GetIP()

    Dim IP

    IP = Request.ServerVariables("HTTP_X_FORWARDED_FOR")

    If IP = "" Then IP = Request.ServerVariables("REMOTE_ADDR")

    GetIP = IP

End Function

%>