Php implementation code to prevent ddos, dns, and cluster attacks-php Tutorial

Php implementation code to prevent ddos, dns, and cluster attacks

/** * Prevents ddos, dns, cluster, and other attacks * Edit bbs.it-home.org */ // Query the forbidden IP address $ 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! "); // Add a prohibited IP address $ 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 ); } } } } // Anti-refresh $ 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; // Anti-refresh time $ AllowNum = 10; // number of anti-refresh attempts $ 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 ); ?>