使用Nginx+Lua实现的WAF - 学习笔记

一.OpenResty安装和测试

官方网站：https://openresty.org/cn/

LUA学习：http://blog.jobbole.com/70480/

1.安装OpenResty：

# yum install -y readline-devel pcre-devel openssl-devel
# cd /usr/local/src
下载并编译安装openresty
# wget https://openresty.org/download/ngx_openresty-1.9.3.2.tar.gz # tar zxf ngx_openresty-1.9.3.2.tar.gz
# cd ngx_openresty-1.9.3.2
# ./configure --prefix=/usr/local/openresty-1.9.3.2 \
--with-luajit --with-http_stub_status_module \
--with-pcre --with-pcre-jit
# gmake && gmake install
# ln -s /usr/local/openresty-1.9.3.2/ /usr/local/openresty

2.测试openresty安装：

vim /usr/local/openresty/nginx/conf/nginx.conf

server {
location /hello {
default_type text/html;
content_by_lua_block {
ngx.say("HelloWorld")
}
}
}

3.启动openresty并测试：

/usr/local/openresty/nginx/sbin/nginx -t

/usr/local/openresty/nginx/sbin/nginx

http://172.16.1.211/hello #访问后出现“HelloWorld”

二.WAF安装和测试

参考资料： https://github.com/unixhot/waf

PS: 这个是赵班长写的WAF安全检测模块，过滤了一些常见的入侵方式，性能也非常不错。

1.安装并配置WAF：

#git clone https://github.com/unixhot/waf.git #cp -a ./waf/waf /usr/local/openresty/nginx/conf/

修
b54a
改Nginx的配置文件，在HTTP字段加入以下配置。注意路径，同时WAF日志默认存放在/tmp/日期_waf.log
vim /usr/local/openresty/nginx/conf/nginx.conf
#WAF
lua_shared_dict limit 50m;
lua_package_path "/usr/local/openresty/nginx/conf/waf/?.lua";
init_by_lua_file "/usr/local/openresty/nginx/conf/waf/init.lua";
access_by_lua_file "/usr/local/openresty/nginx/conf/waf/access.lua";

[root@openstack-compute-node5 ~]# /usr/local/openresty/nginx/sbin/nginx –t
[root@openstack-compute-node5 ~]# /usr/local/openresty/nginx/sbin/nginx

2.WAF配置文件：

vim /usr/local/openresty/nginx/conf/waf/config.lua

--waf 是否开启
config_waf_enable = "on"
--日杂文件目录
config_log_dir = "/tmp"
--配置文件目录
config_rule_dir = "/usr/local/openresty/nginx/conf/waf/rule-config"
--是否开启 白名单链接
config_white_url_check = "on"
--enable/disable 白名单IP
config_white_ip_check = "on"
--enable/disable 黑名单IP
config_black_ip_check = "on"
--enable/disable URL检测
config_url_check = "on"
--enalbe/disable url 参数检查
config_url_args_check = "on"
--enable/disable user agent filtering
config_user_agent_check = "on"
--enable/disable cookie deny filtering
config_cookie_check = "on"
--enable/disable cc 检测
config_cc_check = "on"
--CC检测限制60秒内同一URL只能访问10次
config_cc_rate = "10/60"
--enable/disable post 检测（这个功能作者没完成）
config_post_check = "on"
--config waf output redirect/html
config_waf_output = "html"

3.验证：

http://172.16.1.211/a.sql    #访问会出现安全检测页面
ab -n100 -c1 http://172.16.1.211/   #模仿CC攻击