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<p><FONT class=normalfont><B><font color=blue>让APACHE防止多线程下载</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：sane@nsfocus.com<br>来自：Linux知识宝库<br>联系方式：无名<br><br>下面是sane@nsfocus.com写的一些关于mod_limitipconn.c的文档，可以参考一下：<br>
<br>
mod_limitipconn.c是一个非官方的apache模块，可以用来作为WEB文件的下载限制<br>
，但是它是使用ExtendedStatus On形式，工作在应用层。当同一个IP的连接到达<br>
限制的时候，apache对get请求发送：<br>
<br>
HTTP/1.1 503 Service Temporarily Unavailable<br>
<br>
从而使用户不能下载，但并不能阻止这种攻击，仍旧允许连接的。不过这个东东对<br>
网管来说还是很有用的，特别是下载站的网管。简单介绍一下安装（动态模块方式<br>
安装，假设你的apache已经装在/usr/local/apache目录下）：<br>
<br>
下载：http://dominia.org/djao/limit/mod_limitipconn-0.04.tar.gz<br>
<br>
# tar xzf mod_limitipconn-0.04.tar.gz<br>
# cd mod_limitipconn-0.04<br>
# vi Makefile<br>
<br>
把第一行的：<br>
<br>
APXS = apxs<br>
<br>
改为<br>
<br>
APXS = /usr/local/apache/bin/apxs<br>
<br>
然后：<br>
<br>
# make<br>
# make install<br>
<br>
修改apache配置文件：<br>
<br>
# vi /usr/local/apache/conf/httpd.conf<br>
<br>
ExtendedStatus On ###make install时这句前面的#没有去掉，一定要去掉<br>
<br>
###make install已经加了下面两句，确认存在就行了<br>
LoadModule limitipconn_module libexec/mod_limitipconn.so<br>
AddModule mod_limitipconn.c<br>
<br>
###下面就是对web目录下的文件下载限制<br>
<IfModule mod_limitipconn.c><br>
<Location /><br>
MaxConnPerIP 3 ###限制web根目录同一个IP只能同时开3进程下载<br>
<br>
# 还有其它选项，如：<br>
# NoIPLimit image/*<br>
# OnlyIPLimit audio/mpeg video<br>
# 可以设置多个Location<br>
</Location><br>
</IfModule><br>
<br>
重启apache，用多线程的下载工具下载时，大于3个线程，其余的将得到信息：<br>
<br>
HTTP/1.1 503 Service Temporarily Unavailable<br>
<br>
或者根据User_Agent判断，把已知的多线程工具都给deny 掉<br>
in httpd.conf<br>
.....<br>
BrowserMatch "NetAnt" badguy<br>
BrowserMatch "GetRight" badguy<br>
BrowserMatch "JetCar" badguy<br>
BrowserMatch "Mass Downloader" badguy<br>
BrowserMatch "ReGet" badguy<br>
BrowserMatch "DLExpert" badguy<br>
BrowserMatch "FlashGet" badguy<br>
BrowserMatch "Offline Explorer" badguy<br>
BrowserMatch "Teleport" badguy<br>
...........<br>
<Directory /xxx/xxx/xxx><br>
order deny,allow<br>
deny from env=badguy<br>
allow from all<br>
</Directory><br>
<br>
注意httpd里面应该有 mod_setenvif模块<br>
<br>
</FONT><br>
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