php防止ddos,dns,叢集攻擊的實現代碼

/** * 防止ddos、dns、叢集等攻擊 * edit bbs.it-home.org */ //查詢禁止IP $ip =$_SERVER['REMOTE_ADDR']; $fileht=".htaccess2"; if(!file_exists($fileht)) file_put_contents($fileht,""); $filehtarr=@file($fileht); if(in_array($ip."\r\n",$filehtarr)) die("Warning:"." "."Your IP address are forbided by some reason, IF you have any question Pls emill to shop@jbxue.com!"); //加入禁止IP $time=time(); $fileforbid="log/forbidchk.dat"; if(file_exists($fileforbid)) { if($time-filemtime($fileforbid)>60) unlink($fileforbid); else { $fileforbidarr=@file($fileforbid); if($ip==substr($fileforbidarr[0],0,strlen($ip))) { if($time-substr($fileforbidarr[1],0,strlen($time))>600) unlink($fileforbid); elseif($fileforbidarr[2]>600) { file_put_contents($fileht,$ip."\r\n",FILE_APPEND); unlink($fileforbid); } else { $fileforbidarr[2]++; file_put_contents($fileforbid,$fileforbidarr); } } } } //防重新整理 $str=""; $file="log/ipdate.dat"; if(!file_exists("log")&&!is_dir("log")) mkdir("log",0777); if(!file_exists($file)) file_put_contents($file,""); $allowTime = 120;//防重新整理時間 $allowNum=10;//防重新整理次數 $uri=$_SERVER['REQUEST_URI']; $checkip=md5($ip); $checkuri=md5($uri); $yesno=true; $ipdate=@file($file); foreach($ipdate as $k=>$v) { $iptem=substr($v,0,32); $uritem=substr($v,32,32); $timetem=substr($v,64,10); $numtem=substr($v,74); if($time-$timetem<$allowTime) { if($iptem!=$checkip) $str.=$v; else { $yesno=false; if($uritem!=$checkuri) $str.=$iptem.$checkuri.$time."1\r\n"; elseif($numtem<$allowNum) $str.=$iptem.$uritem.$timetem.($numtem+1)."\r\n"; else { if(!file_exists($fileforbid)) { $addforbidarr=array($ip."\r\n",time()."\r\n",1); file_put_contents($fileforbid,$addforbidarr); } file_put_contents("log/forbided_ip.log",$ip."--".date("Y-m-d H:i:s",time())."--".$uri."\r\n",FILE_APPEND); $timepass=$timetem+$allowTime-$time; die("Warning:"." "."Sorry,you are forbided by refreshing frequently too much, Pls wait for ".$timepass." seconds to continue!"); } } } } if($yesno) $str.=$checkip.$checkuri.$time."1\r\n"; file_put_contents($file,$str); ?> 複製代碼

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