最近网站经常被攻击,后来想到了一个利用php来防止网站受攻击的办法,下面是我的代码,代码不是最好的,根据自己的需求来做,下面来看看我的代码.
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$ip =$_server['remote_addr'];
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$fileht=".htaccess2";
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if(!file_exists($fileht))file_put_contents($fileht,"");
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$filehtarr=@file($fileht);
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if(in_array($ip."rn",$filehtarr))die("warning:"."
"."your ip address are forbided by mydalle.com anti-refresh mechanism, if you have any question pls emill to shop@mydalle.com!
(mydalle.com anti-refresh mechanism is to enable users to have a good shipping services, but there maybe some inevitable network problems in your ip address, so that you can mail to us to solve.)");
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$time=time();
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$fileforbid="log/forbidchk.dat";
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if(file_exists($fileforbid))
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{ if($time-filemtime($fileforbid)>30)unlink($fileforbid);
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else{
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$fileforbidarr=@file($fileforbid);
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if($ip==substr($fileforbidarr[0],0,strlen($ip)))
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{
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if($time-substr($fileforbidarr[1],0,strlen($time))>120)unlink($fileforbid);
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elseif($fileforbidarr[2]>120){file_put_contents($fileht,$ip."rn",file_append);unlink($fileforbid);}
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else{$fileforbidarr[2]++;file_put_contents($fileforbid,$fileforbidarr);}
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}
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}
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}
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$str="";
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$file="log/ipdate.dat";
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if(!file_exists("log")&&!is_dir("log"))mkdir("log",0777);
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if(!file_exists($file))file_put_contents($file,"");
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$allowtime = 60;
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$allownum=5;
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$uri=$_server['request_uri'];
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$checkip=md5($ip);
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$checkuri=md5($uri);
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$yesno=true;
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$ipdate=@file($file);
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foreach($ipdate as $k=>$v)
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{ $iptem=substr($v,0,32);
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$uritem=substr($v,32,32);
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$timetem=substr($v,64,10);
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$numtem=substr($v,74);
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if($time-$timetem<$allowtime){
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if($iptem!=$checkip)$str.=$v;
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else{
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$yesno=false;
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if($uritem!=$checkuri)$str.=$iptem.$checkuri.$time."1rn";
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elseif($numtem<$allownum)$str.=$iptem.$uritem.$timetem.($numtem+1)."rn";
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else
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{
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if(!file_exists($fileforbid)){$addforbidarr=array($ip."rn",time()."rn",1);file_put_contents($fileforbid,$addforbidarr);}
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file_put_contents("log/forbided_ip.log",$ip."--".date("y-m-d h:i:s",time())."--".$uri."rn",file_append);
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$timepass=$timetem+$allowtime-$time;
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die("warning:"."
"."pls don't refresh too frequently, and wait for ".$timepass." seconds to continue, if not your ip address will be forbided automatic by mydalle.com anti-refresh mechanism!
(mydalle.com anti-refresh mechanism is to enable users to have a good shipping services, but there maybe some inevitable network problems in your ip address, so that you can mail to us to solve.)");
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}
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}
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}
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}
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if($yesno) $str.=$checkip.$checkuri.$time."1rn";
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file_put_contents($file,$str);
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?>
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(责任编辑:最模板) |