Rumah > Artikel > pembangunan bahagian belakang > PHP程序防止ddos,dns,集群服务器攻击_PHP教程
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<?php
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//查询禁止IP
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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.
"\r\n"
,$filehtarr))die(
"Warning:"
.
"<br>"
.
"Your IP address are forbided by some reason, IF you have any question Pls emill to shop@mydalle.com!"
);
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//加入禁止IP
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$
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($fileforbid)>60)unlink($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
))>600)unlink($fileforbid);
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elseif($fileforbidarr[2]>600){file_put_contents($fileht,$ip.
"\r\n"
,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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//防刷新
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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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$allowTime = 120;//防刷新时间
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$allowNum=10;//防刷新次数
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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
-$timetem
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if
($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
.
"1\r\n"
;
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elseif($numtem"\r\n"
;
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else
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{
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if
(!file_exists($fileforbid)){$addforbidarr=array($ip.
"\r\n"
,
time
().
"\r\n"
,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.
"\r\n"
,FILE_APPEND);
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$timepass=$timetem+$allowTime-$
time
;
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die(
"Warning:"
.
"<br>"
.
"Sorry,you are forbided by refreshing frequently too much, Pls wait for "
.$timepass.
" seconds to continue!"
);
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}
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}
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}
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}
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if
($yesno) $str.=$checkip.$checkuri.$
time
.
"1\r\n"
;
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file_put_contents($
file
,$str);
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?>