WAF嵌入LNMP集群架构

前言：

之前想着每天都更新一篇文章，但是连续几天之后，发现有好多博客大佬，所以觉得还是不要献丑好一点，然后就学习一下关于安全防护的知识，毕竟安全意识强弱代表在互联网防护能力，类似ddos，xss,csrf等也是经常出现，比如一些基本的×××方式：SQL注入，web参数，cc。所以我就记录了下面全程的将WAF嵌入LNMP架构，应用于实战集群架构。附带lua语言写的防护模块。

实战：

服务器架构图如下：

一、web服务器集群高可用负载均衡

1.高可用使用：nginx+keepalived模式

master（web1） 192.168.0.230
slaver（web2） 192.168.0.211
VIP：192.168.0.100

2.两边安装keepalived
[[email protected] ~]# yum install -y keepalived

3.创建服务器监控脚本

[[email protected] ~]# mkdir -p /server/work
[[email protected] ~]# cd  /server/work/
[[email protected] work]# vim check_ng.sh
#!/bin/bash
#write by leo
d=`date --date today +%Y%m%d_%H:%M:%S`
n=`ps -C nginx --no-heading|wc -l`
#如果进程为0，则启动nginx，并且再次检测nginx进程数量，
#如果还为0，说明nginx无法启动，此时需要关闭keepalived
if [ $n -eq "0" ]; then
        /etc/init.d/nginx start
        n2=`ps -C nginx --no-heading|wc -l`
        if [ $n2 -eq "0"  ]; then
                echo "$d nginx down,keepalived will stop" >> /server/logs/nginx/check_ng.log
                systemctl stop keepalived
        fi
fi
[[email protected] work]# mkdir -p /server/logs/nginx
[[email protected] work]# chmod +x  check_ng.sh

4.修改master的keepalived配置文件

[[email protected] ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   notification_email {
[email protected]
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
   vrrp_script chk_nginx {
    script "/server/work/check_ng.sh"
    interval 3
    }

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 000000
    }
    virtual_ipaddress {
        192.168.0.100
    }

    track_script {
        chk_nginx
    }

}

[[email protected] ~]# systemctl stop nginx
[[email protected] ~]# systemctl status nginx
● nginx.service - LSB: starts the nginx web server
   Loaded: loaded (/etc/rc.d/init.d/nginx; bad; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:systemd-sysv-generator(8)
[[email protected] ~]# systemctl start keepalived
[[email protected] ~]# systemctl status keepalived
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: active (running) since Fri 2018-07-13 15:06:13 CST; 32s ago
  Process: 14019 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 14020 (keepalived)
   CGroup: /system.slice/keepalived.service
           ├─14020 /usr/sbin/keepalived -D
           ├─14021 /usr/sbin/keepalived -D
           └─14022 /usr/sbin/keepalived -D

Jul 13 15:06:15 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:15 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:15 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:15 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: VRRP_Instance(VI_1) Sendi...
Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Hint: Some lines were ellipsized, use -l to show in full.

5.修改slaver的keepalived配置文件

[[email protected] ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   notification_email {
[email protected]
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
   vrrp_script chk_nginx {
    script "/server/work/check_ng.sh"
    interval 3
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 51
    priority 90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 000000
    }
    virtual_ipaddress {
    192.168.0.100
    }

    track_script {
        chk_nginx
    }
}

[[email protected] ~]# systemctl stop nginx
[[email protected] ~]# systemctl status nginx
● nginx.service - LSB: starts the nginx web server
   Loaded: loaded (/etc/rc.d/init.d/nginx; bad; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:systemd-sysv-generator(8)
[[email protected] ~]# systemctl start keepalived
[[email protected] ~]# systemctl status keepalived
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: active (running) since Fri 2018-07-13 15:07:20 CST; 43s ago
  Process: 13279 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 13280 (keepalived)
   CGroup: /system.slice/keepalived.service
           ├─13280 /usr/sbin/keepalived -D
           ├─13281 /usr/sbin/keepalived -D
           └─13282 /usr/sbin/keepalived -D

Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: Registering Kernel netlin...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: Registering gratuitous AR...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: Opening file ‘/etc/keepal...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: WARNING - default user ‘k...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: SECURITY VIOLATION - scri...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: VRRP_Instance(VI_1) remov...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: Using LinkWatch kernel ne...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: VRRP_Instance(VI_1) Enter...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: VRRP sockpool: [ifindex(2...
Jul 13 15:07:20 web2 Keepalived_vrrp[13282]: VRRP_Script(chk_nginx) su...
Hint: Some lines were ellipsized, use -l to show in full.

6.在master上查看IP地址

[[email protected] ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:c5:33:97 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.230/24 brd 192.168.0.255 scope global noprefixroute dynamic ens33
       valid_lft 6103sec preferred_lft 6103sec
    inet 192.168.0.100/32 scope global ens33
       valid_lft forever preferred_lft forever

7.在slaver上查看IP地址

[[email protected] ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:d7:df:dc brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.211/24 brd 192.168.0.255 scope global noprefixroute dynamic ens33
       valid_lft 6107sec preferred_lft 6107sec
    inet6 fe80::20c:29ff:fed7:dfdc/64 scope link
       valid_lft forever preferred_lft forever

8.在master上关闭keepalived服务（模拟master宕机或者脑裂情况）

[[email protected] ~]# systemctl stop keepalived
[[email protected] ~]# systemctl status keepalived
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: inactive (dead)

Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:06:20 web1 Keepalived_vrrp[14022]: Sending gratuitous ARP on...
Jul 13 15:11:20 web1 systemd[1]: Stopping LVS and VRRP High Availabil....
Jul 13 15:11:20 web1 Keepalived[14020]: Stopping
Jul 13 15:11:20 web1 Keepalived_vrrp[14022]: VRRP_Instance(VI_1) sent ...
Jul 13 15:11:20 web1 Keepalived_vrrp[14022]: VRRP_Instance(VI_1) remov...
Jul 13 15:11:21 web1 Keepalived_vrrp[14022]: Stopped
Jul 13 15:11:21 web1 Keepalived[14020]: Stopped Keepalived v1.3.5 (03...2
Jul 13 15:11:21 web1 systemd[1]: Stopped LVS and VRRP High Availabili....
Hint: Some lines were ellipsized, use -l to show in full.

9.在slaver上查看状态

[[email protected] ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:d7:df:dc brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.211/24 brd 192.168.0.255 scope global noprefixroute dynamic ens33
       valid_lft 5895sec preferred_lft 5895sec
    inet 192.168.0.100/32 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fed7:dfdc/64 scope link
       valid_lft forever preferred_lft forever
[[email protected] ~]# systemctl status  keepalived
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: active (running) since Fri 2018-07-13 15:07:20 CST; 7min ago
  Process: 13279 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 13280 (keepalived)
   CGroup: /system.slice/keepalived.service
           ├─13280 /usr/sbin/keepalived -D
           ├─13281 /usr/sbin/keepalived -D
           └─13282 /usr/sbin/keepalived -D

Jul 13 15:12:22 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Jul 13 15:12:22 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Jul 13 15:12:22 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Jul 13 15:12:22 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Jul 13 15:12:27 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Jul 13 15:12:27 web2 Keepalived_vrrp[13282]: VRRP_Instance(VI_1) Sendi...
Jul 13 15:12:27 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Jul 13 15:12:27 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Jul 13 15:12:27 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Jul 13 15:12:27 web2 Keepalived_vrrp[13282]: Sending gratuitous ARP on...
Hint: Some lines were ellipsized, use -l to show in full.

10.查看丢包情况
在windows上模拟持续性访问，使用ping查看丢包情况

二、建立共享存储服务器

1.安装NFS方式，master 服务端
[[email protected] web]# yum install -y rpcbind nfs-utils

2.slaver 客户端
[[email protected] web]# yum install -y nfs-utils

3.master服务端启动共享存储服务

[[email protected] web]# cat /etc/exports
/server/web    192.168.0.0/24(rw,sync,no_root_squash)
[[email protected] web]# systemctl start nfs

4.slaver客户端查看共享存储

[[email protected] web]# showmount -e 192.168.0.230
Export list for 192.168.0.230:
/server/web 192.168.0.0/24
[[email protected] web]#
[[email protected] web]# mount -t nfs 192.168.0.230:/server/web   /server/web    -o proto=tcp -o nolock
[[email protected] web]# ls
[[email protected] web]# df -h
Filesystem                 Size  Used Avail Use% Mounted on
/dev/mapper/centos-root     50G  4.2G   46G   9% /
devtmpfs                   899M     0  899M   0% /dev
tmpfs                      911M     0  911M   0% /dev/shm
tmpfs                      911M  9.6M  902M   2% /run
tmpfs                      911M     0  911M   0% /sys/fs/cgroup
/dev/sda1                 1014M  142M  873M  14% /boot
/dev/mapper/centos-home     47G   74M   47G   1% /home
tmpfs                      183M     0  183M   0% /run/user/0
192.168.0.230:/server/web   50G  4.2G   46G   9% /server/web
[[email protected] web]#

5.修改nginx配置文件（两边配置一致）

[[email protected] ~]# cd /usr/local/nginx/conf/vhost/
[[email protected] vhost]# vim zt.conf
server
    {
        listen 80;
        #listen [::]:80 default_server ipv6only=on;
        server_name zt.linuxview.com ;
        index index.html index.htm index.php;
        root  /server/web/test;

        #error_page   404   /404.html;
        error_page   404   404/404.html;
        include enable-php.conf;

        location /nginx_status
        {
            stub_status on;
            access_log   off;
        }

    location ~* ^/data/(attachment|avatar)/.*\.(php|php5)$ {
        deny all;
    }

        location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
        {
            expires      30d;
        }

        location ~ .*\.(js|css)?$
        {
            expires      12h;
        }

        location ~ /\.
        {
            deny all;
        }

        access_log  /server/logs/nginx/zuitu/access.log ;
        error_log  /server/logs/nginx/zuitu/error.log ;
    }

6.访问网页

7.master上设置反向代理

[[email protected] vhost]# vim xs.conf
server
    {
        listen 80;
        server_name xs.linuxview.com ;

    location / {
        proxy_pass http://192.168.0.211:80;
        proxy_set_header Host xs.linuxview.com;
        proxy_redirect off;
        proxy_set_header X-Real-IP 192.168.0.211;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_connect_timeout 60;
        proxy_read_timeout 600;
        proxy_send_timeout 600;
    }

        access_log  /server/logs/nginx/zuitu/access.log ;
        error_log  /server/logs/nginx/zuitu/error.log ;
    }
[[email protected] vhost]# /usr/local/nginx/sbin/nginx -s reload

8.slaver上设置nginx的配置文件

[[email protected] vhost]# vim xs.conf
server
    {
        listen 80;
        #listen [::]:80 default_server ipv6only=on;
        server_name xs.linuxview.com ;
        index index.html index.htm index.php;
        root  /server/web/test3;

        #error_page   404   /404.html;
        error_page   404   404/404.html;
        include enable-php.conf;

        location /nginx_status
        {
            stub_status on;
            access_log   off;
        }

    location ~* ^/data/(attachment|avatar)/.*\.(php|php5)$ {
        deny all;
    }

        location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
        {
            expires      30d;
        }

        location ~ .*\.(js|css)?$
        {
            expires      12h;
        }

        location ~ /\.
        {
            deny all;
        }

        access_log  /server/logs/nginx/zuitu/access.log ;
        error_log  /server/logs/nginx/zuitu/error.log ;
    }

[[email protected] vhost]# /usr/local/nginx/sbin/nginx -s reload

9.访问网页测试

三、WAF镶嵌lnmp架构

1.安装依赖包
[[email protected] ~]# yum install -y readline-devel pcre-devel openssl-devel gcc* git* libxml2*

2.下载2.0.5版本的luajit，编译安装

[[email protected] ~]# mkdir -p /server/source
[[email protected] ~]# cd /server/source/
[[email protected] source]# wget http://luajit.org/download/LuaJIT-2.0.5.tar.gz
[[email protected] source]# tar -xf LuaJIT-2.0.5.tar.gz
[[email protected] source]# cd LuaJIT-2.0.5
[[email protected] LuaJIT-2.0.5]# export LUAJIT_LIB=/user/local/lib
[[email protected] LuaJIT-2.0.5]# export LUAJIT_INC=/usr/local/include/luajit-2.0
[[email protected] LuaJIT-2.0.5]# make && make install   &&  ln -s /usr/local/lib/libluajit-5.1.so.2 /lib64/libluajit-5.1.so.2

成功安装标志：

3.下载并编译安装openresty

[[email protected] source]# wget https://openresty.org/download/openresty-1.11.2.2.tar.gz
[[email protected] source]# tar -xf openresty-1.11.2.2.tar.gz
[[email protected] source]# cd openresty-1.11.2.2
[root[email protected] openresty-1.11.2.2]# ./configure --prefix=/usr/local/openresty  --user=www  --group=www  --with-luajit --with-http_v2_module  --with-http_stub_status_module  --with-http_ssl_module  --with-http_gzip_static_module  --with-ipv6 --with-http_sub_module  --with-pcre  --with-pcre-jit  --with-file-aio --with-http_dav_module
[[email protected] openresty-1.11.2.2]# gmake && gmake install

4.修改最大文件打开数量

[[email protected] openresty-1.11.2.2]# vim /proc/sys/fs/file-max
100000
[[email protected] openresty-1.11.2.2]# ulimit -l
64

5.修改openresty内置的nginx配置文件（--prefix指定的是安装目录，所以配置文件就在安装目录里面，编译完成之后，就不用在源码包界面了）

[[email protected] openresty]# mkdir /server/conf
[[email protected] openresty]# pwd
/usr/local/openresty
[[email protected] openresty]# cd /server/conf/
[[email protected] conf]# ls
[[email protected] conf]# ln -s /usr/local/openresty    /server/conf/openresty
[[email protected] conf]# ls
openresty
[[email protected] conf]# ln -s  /usr/local/openresty/nginx    /server/conf/nginx
[[email protected] conf]# ll
total 0
lrwxrwxrwx 1 root root 26 Jul 10 09:25 nginx -> /usr/local/openresty/nginx
lrwxrwxrwx 1 root root 20 Jul 10 09:23 openresty -> /usr/local/openresty
[[email protected] conf]#vim nginx.conf   （修改user为www ,在最后一行的括号上新增include vhost/*.conf;）
[[email protected] conf]# useradd www -M -s /sbin/nologin
[[email protected] conf]# mkdir vhost
[[email protected] conf]# cd vhost/
##编写测试网页
[[email protected] vhost]# vim waf.conf
server {
        listen 80 ;
        server_name waf.linuxview.com ;
        index index.html index.php index.htm ;
        root /server/web/waf ;

        error_log /server/logs/nginx/waf/error.log;
        access_log /server/logs/nginx/waf/access.log;
}
[[email protected] vhost]# mkdir -p /server/web/waf && cd /server/web/waf
##创建测试网页
[[email protected] waf]# cat index.html
Welcome to Linuxview!!!
##重加载nginx
[[email protected] waf]# /usr/local/openresty/nginx/sbin/nginx -s reload

6.访问测试网页

7.安装waf防护模块

[[email protected] waf]# cd /server/source/      #这个目录用来存源码或软件包等
[[email protected] source]# git clone https://github.com/leoheng/lua.git
#这些全是lua语言写的防护模块，复制到nginx的conf配置文件目录
[[email protected] waf]# cp -a ./waf  /server/conf/nginx/conf/
[[email protected] waf]# cd /server/conf/nginx/conf/
[[email protected] conf]# ls
fastcgi.conf            koi-win             scgi_params           waf
fastcgi.conf.default    mime.types          scgi_params.default   win-utf
fastcgi_params          mime.types.default  uwsgi_params
fastcgi_params.default  nginx.conf          uwsgi_params.default
koi-utf                 nginx.conf.default  vhost
[[email protected] conf]# cd waf/
[[email protected] waf]# ls
access.lua  config.lua  init.lua  lib.lua  rule-config
[[email protected] waf]#cd ..
##在http字段下添加lua模块
[[email protected] conf]# vim nginx.conf
        lua_shared_dict limit 50m;  ##CC,50M
        lua_package_path  /server/conf/nginx/conf/waf/?.lua ;
        init_by_lua_file  /server/conf/nginx/conf/waf/init.lua ;
        access_by_lua_file  /server/conf/nginx/conf/waf/access.lua ;

##检查配置文件并重加载服务
[[email protected] conf]# /usr/local/openresty/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/openresty/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/openresty/nginx/conf/nginx.conf test is successful
[[email protected] conf]# /usr/local/openresty/nginx/sbin/nginx -s reload

8.配置waf防护

[[email protected] waf]# cat config.lua
--WAF config file,enable = "on",disable = "off"   ##WAF功能选项
--waf status
config_waf_enable = "on"    ##是否启动waf防护
--log dir
config_log_dir = "/server/logs/waf_logs"     ##waf的日志
--rule setting
config_rule_dir = "/usr/local/openresty/nginx/conf/waf/rule-config"     ##waf的防护规则配置文件
--enable/disable white url
config_white_url_check = "on"        ##配置白名单url检查
--enable/disable white ip
config_white_ip_check = "on"         ##配置白名单IP检查
--enable/disable block ip
config_black_ip_check = "on"          ##配置黑名单IP检查
--enable/disable url filtering
config_url_check = "on"                    ##配置url检查过滤
--enalbe/disable url args filtering
config_url_args_check = "on"            ##配置url参数检查
--enable/disable user agent filtering
config_user_agent_check = "on"        ##配置用户代理检查
--enable/disable cookie deny filtering
config_cookie_check = "on"       ##配置cookie过滤检查
--enable/disable cc filtering
config_cc_check = "on"                ##配置CC×××检查过滤
--cc rate the xxx of xxx seconds
config_cc_rate = "10/60"            ##CC×××速率访问网页每60秒访问10次
--enable/disable post filtering
config_post_check = "on"          ##配置post检查过滤
--config waf output redirect/html
config_waf_output = "html"           ##配置匹配成功重定向或者输出警告页面
--if config_waf_output ,setting url
config_waf_redirect_url = "https://www.baidu.com"            ##重定向到百度首页
##输出HTML格式的警告信息[[ html警告内容 ]]
config_output_html=[[
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="zh-cn" />
<title>WAF-TEST</title>
</head>
<body>
<h1 align="center> WAF功能防护中，请勿进行非正常操作
</body>
</html>
]]

9.访问匹配模块
规则：检测白名单-》黑名单-》UA×××检测-》CC×××检测-》cookie检测-》URL检测-》URL×××检测-》URL参数检测-》post检测

[[email protected] waf]# cat access.lua
require ‘init‘     ##先请求init.lua文件进行匹配，然后进行检查功能匹配
##配置检查顺序
function waf_main()
    if white_ip_check() then
    elseif black_ip_check() then
    elseif user_agent_attack_check() then
    elseif cc_attack_check() then
    elseif cookie_attack_check() then
    elseif white_url_check() then
    elseif url_attack_check() then
    elseif url_args_attack_check() then
    --elseif post_attack_check() then
    else
        return
    end
end

waf_main()

[[email protected] waf]#

10.防护规则大概流程图：

11.url参数测试

12.模拟CC×××测试
[[email protected] waf]# ab -c 100 -t 100 http://waf.linuxview.com/

13.查看日志记录：×××方式，客户端地址，被×××的服务器时间等等

14.SQL测试

15.安装httpguard再升级CC防护
下载压缩包，复制lua配置到waf下

[[email protected] waf]# cd /server/source/
[[email protected] source]# wget --no-check-certificate https://github.com/centos-bz/HttpGuard/archive/master.zip
[[email protected] source]# unzip master.zip
[[email protected] source]# cd HttpGuard-master/
[[email protected] HttpGuard-master]# cp guard.lua /server/conf/nginx/conf/waf/
[[email protected] HttpGuard-master]# cp runtime.lua /server/conf/nginx/conf/waf/

四、MySQL5.7集群（双主多从模式）

当只有两台数据库的时候，使用双主模式（互为主从）

1.修改master的mysql配置文件

[[email protected] ~]# vim /etc/my.cnf    #在mysqld下新增一下配置
[mysqld]
log-bin=mysql-bin
binlog_format=mixed
server-id   = 1
sync_binlog = 1
binlog_checksum = none
binlog_format = mixed
auto-increment-increment = 2
auto-increment-offset = 1
slave-skip-errors = all

[[email protected] ~]# systemctl restart mysql
[[email protected] ~]# systemctl status mysql
● mysql.service - LSB: start and stop MySQL
   Loaded: loaded (/etc/rc.d/init.d/mysql; bad; vendor preset: disabled)
   Active: active (exited) since Fri 2018-07-13 17:18:39 CST; 6s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 37255 ExecStart=/etc/rc.d/init.d/mysql start (code=exited, status=0/SUCCESS)

Jul 13 17:18:39 web1 systemd[1]: Starting LSB: start and stop MySQL...
Jul 13 17:18:39 web1 mysql[37255]: Starting MySQL SUCCESS!
Jul 13 17:18:39 web1 systemd[1]: Started LSB: start and stop MySQL.
Jul 13 17:18:40 web1 mysql[37255]: 2018-07-13T09:18:40.050893Z mysqld_safe A mys...ts
Hint: Some lines were ellipsized, use -l to show in full.

2.进入数据库，赋权给web2用户，让它连接主数据库同步数据

[[email protected] ~]# mysql -uroot -p000000
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.18-log Source distribution

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> grant replication slave,replication client on *.* to [email protected]‘192.168.0.%‘ identified by "000000";
Query OK, 0 rows affected, 1 warning (0.13 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.03 sec)

###查看log bin日志和post值位置
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000006 |      620 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.01 sec)

mysql>

3.在slaver上修改MySQL配置文件

[[email protected] ~]# vim /etc/my.cnf
[mysqld]
server-id = 2
log-bin = mysql-bin
sync_binlog = 1
binlog_checksum = none
binlog_format = mixed
auto-increment-increment = 2
auto-increment-offset = 2
slave-skip-errors = all

[[email protected] ~]# systemctl restart mysql
[[email protected] ~]# systemctl status mysql
● mysql.service - LSB: start and stop MySQL
   Loaded: loaded (/etc/rc.d/init.d/mysql; bad; vendor preset: disabled)
   Active: active (running) since Fri 2018-07-13 17:29:56 CST; 20s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 31883 ExecStart=/etc/rc.d/init.d/mysql start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/mysql.service
           ├─31891 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/m...
           └─32461 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadi...

Jul 13 17:29:38 web2 systemd[1]: Starting LSB: start and stop MySQL...
Jul 13 17:29:56 web2 mysql[31883]: Starting MySQL................. SUCCESS!
Jul 13 17:29:56 web2 systemd[1]: Started LSB: start and stop MySQL.

4.创建数据库用户用于数据库同步数据

[[email protected] ~]# mysql -uroot -p000000
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.18-log Source distribution

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> grant replication slave,replication client on *.* to [email protected]‘192.168.0.%‘ identified by "000000";
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘identiified by "000000"‘ at line 1
mysql> grant replication slave,replication client on *.* to [email protected]‘192.168.0..%‘ identified by "000000";
Query OK, 0 rows affected, 1 warning (0.18 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000007 |      610 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.01 sec)

mysql>

5.在master上同步数据库到slaver上

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.02 sec)

mysql> change  master to master_host=‘192.168.0.211‘,master_user=‘web2‘,master_password=‘000000‘,master_log_file=‘mysql-bin.000006‘,master_log_pos=620;
Query OK, 0 rows affected, 2 warnings (0.03 sec)

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.0.211
                  Master_User: web2
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000008
          Read_Master_Log_Pos: 1110
               Relay_Log_File: web1-relay-bin.000002
                Relay_Log_Pos: 312
        Relay_Master_Log_File: mysql-bin.000008
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB:
          Replicate_Ignore_DB:
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table:
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 0
                   Last_Error:
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 1110
              Relay_Log_Space: 510
              Until_Condition: None
               Until_Log_File:
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File:
           Master_SSL_CA_Path:
              Master_SSL_Cert:
            Master_SSL_Cipher:
               Master_SSL_Key:
        Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error:
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 2
                  Master_UUID: ed87ba4b-8653-11e8-94fe-000c29d7dfdc
             Master_Info_File: /usr/local/mysql/var/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp:
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set:
            Executed_Gtid_Set:
                Auto_Position: 0
         Replicate_Rewrite_DB:
                 Channel_Name:
           Master_TLS_Version:
1 row in set (0.00 sec)

6.在slaver上同步master的数据库

mysql> stop slave;
Query OK, 0 rows affected, 1 warning (0.02 sec)

mysql> change  master to master_host=‘192.168.0.230‘,master_user=‘web2‘,master_password=‘000000‘,master_log_file=‘mysql-bin.000006‘,master_log_pos=620;
Query OK, 0 rows affected, 2 warnings (0.03 sec)

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Connecting to master
                  Master_Host: 192.168.0.230
                  Master_User: web1
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000010
          Read_Master_Log_Pos: 1110
               Relay_Log_File: web2-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000010
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

7.在master的数据库上创建数据库和表

mysql> create database leotest;
Query OK, 1 row affected (0.00 sec)

mysql> use leotest;
Database changed

mysql> create table test(id int(4),name varchar(10));
Query OK, 0 rows affected (0.04 sec)

mysql> show tables ;
+-------------------+
| Tables_in_leotest |
+-------------------+
| test              |
+-------------------+
1 row in set (0.00 sec)

mysql>

8.在slaver上查看同步的数据

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| leotest            |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

mysql>

至此，MySQL集群已完成，而waf嵌入LNMP集群架构也完成了。

原文地址：http://blog.51cto.com/leoheng/2148772