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PHP implementation code to prevent Ddos, DNS, and cluster attacks

WBOY
Release： 2016-07-25 08:58:34
Original
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  2. /**
  3. * Prevent ddos, dns, cluster and other attacks
  4. * edit bbs.it-home.org
  5. */
  6. //查询禁止IP
  7. $ip =$_SERVER['REMOTE_ADDR'];
  8. $fileht=".htaccess2";
  9. if(!file_exists($fileht))
  10. file_put_contents($fileht,"");
  11. $filehtarr=@file($fileht);
  12. if(in_array($ip."rn",$filehtarr))
  13. die("Warning:"."
    "."Your IP address are forbided by some reason, IF you have any question Pls emill to shop@jbxue.com!");
  14. //加入禁止IP
  15. $time=time();
  16. $fileforbid="log/forbidchk.dat";
  17. if(file_exists($fileforbid)) {
  18. if($time-filemtime($fileforbid)>60)
  19. unlink($fileforbid);
  20. else {
  21. $fileforbidarr=@file($fileforbid);
  22. if($ip==substr($fileforbidarr[0],0,strlen($ip))) {
  23. if($time-substr($fileforbidarr[1],0,strlen($time))>600)
  24. unlink($fileforbid);
  25. elseif($fileforbidarr[2]>600) {
  26. file_put_contents($fileht,$ip."rn",FILE_APPEND);
  27. unlink($fileforbid);
  28. } else {
  29. $fileforbidarr[2]++;
  30. file_put_contents($fileforbid,$fileforbidarr);
  31. }
  32. }
  33. }
  34. }
  35. //防刷新
  36. $str="";
  37. $file="log/ipdate.dat";
  38. if(!file_exists("log")&&!is_dir("log"))
  39. mkdir("log",0777);
  40. if(!file_exists($file))
  41. file_put_contents($file,"");
  42. $allowTime = 120;//防刷新时间
  43. $allowNum=10;//防刷新次数
  44. $uri=$_SERVER['REQUEST_URI'];
  45. $checkip=md5($ip);
  46. $checkuri=md5($uri);
  47. $yesno=true;
  48. $ipdate=@file($file);
  49. foreach($ipdate as $k=>$v) {
  50. $iptem=substr($v,0,32);
  51. $uritem=substr($v,32,32);
  52. $timetem=substr($v,64,10);
  53. $numtem=substr($v,74);
  54. if($time-$timetem<$allowTime) {
  55. if($iptem!=$checkip)
  56. $str.=$v;
  57. else {
  58. $yesno=false;
  59. if($uritem!=$checkuri)
  60. $str.=$iptem.$checkuri.$time."1rn";
  61. elseif($numtem<$allowNum)
  62. $str.=$iptem.$uritem.$timetem.($numtem+1)."rn";
  63. else {
  64. if(!file_exists($fileforbid)) {
  65. $addforbidarr=array($ip."rn",time()."rn",1);
  66. file_put_contents($fileforbid,$addforbidarr);
  67. }
  68. file_put_contents("log/forbided_ip.log",$ip."--".date("Y-m-d H:i:s",time())."--".$uri."rn",FILE_APPEND);
  69. $timepass=$timetem+$allowTime-$time;
  70. die("Warning:"."
    "."Sorry,you are forbided by refreshing frequently too much, Pls wait for ".$timepass." seconds to continue!");
  71. }
  72. }
  73. }
  74. }
  75. if($yesno) $str.=$checkip.$checkuri.$time."1rn";
  76. file_put_contents($file,$str);
  77. ?>
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