笔者通过在路由器上搭建Provioxy代理服务器来实现过滤通过其对网页，并植入相应对广告。

废话不多说直接上实验：

第一步：准备固件

编译OpenWrt固件－选择Privoxy

第二步：修改配置文件

配置user.filter, user.action, config文件。

config文件中需要指定监听都地址与端口号

[email protected]:/etc/privoxy# cat config
confdir /etc/privoxy
logdir /var/log
filterfile default.filter
filterfile user.filter
#logfile privoxy
actionsfile match-all.action # Actions that are applied to all sites and maybe overruled later on.
actionsfile default.action   # Main actions file
actionsfile user.action      # User customizations
listen-address  10.1.1.1:8118
toggle  1
enable-remote-toggle  1
enable-remote-http-toggle  0
enable-edit-actions 1
enforce-blocks 0
buffer-limit 4096
forwarded-connect-retries  0
accept-intercepted-requests 1
allow-cgi-request-crunching 0
split-large-forms 0
keep-alive-timeout 300
socket-timeout 300
permit-access  10.1.1.0/24
debug   1    # show each GET/POST/CONNECT request
debug   4096 # Startup banner and warnings
debug   8192 # Errors - *we highly recommended enabling this*
#admin-address [email protected]
#proxy-info-url http://www.example.com/proxy-service.html

[email protected]:/etc/privoxy# 

在user.action中注入广告脚本 xxx.js

具体参考我的脚本 https://gist.github.com/qianguozheng

user.filter中添加过滤规则

FILTER: block-weeds
s|</head>|<script type="text/javascript" src="http://www.yourdomainname.com/ystest/js/hupu.js"></script>$0|
user.action中调用过滤规则
{+filter{block-weeds}}
.*
将所有目标地址为80端口的请求转到8118端口
iptables -t nat -A PREROUTING -s 0.0.0.0/0.0.0.0 -p tcp --dport 80 -j REDIRECT --to-ports 8118

第三步：体验结果

这时候，当你打开网页的时候，你会发现原来世界那么容易控制, 每个网页都有你所想看到都东西。