一、安装相关工具

yum install -y wget epel-release
yum install -y httpd httpd-devel pcre pcre-devel libxml2-devel gcc lua-devel yajl-devel ssdeep-devel curl-devel

二、编译ModSecurity

下载ModSecurity.
将modsecurity安装包上传至/usr/local目录下

cd /usr/local
tar -zxvf modsecurity-2.9.3.tar.gz
cd modsecurity-2.9.3
./configure --enable-standalone-module --disable-mlogc
make

三、安装nginx

cd /usr/local
wget http://nginx.org/download/nginx-1.18.0.tar.gz
tar -xvzf nginx-1.18.0.tar.gz
cd /usr/local/nginx-1.18.0
./configure --add-module=/usr/local/modsecurity-2.9.3/nginx/modsecurity/  --with-http_ssl_module  --with-stream    --prefix=/usr/local/nginx
make
make install

四、测试效果

启动nginx

/usr/local/nginx/sbin/nginx

模拟攻击，测试未启动ModSecurity时的访问效果，访问URL为：http://服务器IP/?param=%22%3E%3Cscript%3Ealert(1);%3C/script%3E

效果如下：

五、最后配置

1、创建用于存在配置文件的文件夹，并复制相关配置文件到目录中

mkdir -p /usr/local/nginx/conf/modsecurity/
cp /usr/local/modsecurity-2.9.3/modsecurity.conf-recommended /usr/local/nginx/conf/modsecurity/modsecurity.conf
cp /usr/local/modsecurity-2.9.3/unicode.mapping /usr/local/nginx/conf/modsecurity/unicode.mapping

2、下载规则文件压缩包: owasp-modsecurity-crs-3.3-dev.

将owasp-modsecurity-crs-3.3-dev压缩包上传至/usr/local目录下并解压

unzip owasp-modsecurity-crs-3.3-dev.zip

复制crs-setup.conf.example到/usr/local/nginx/conf/modsecurity/下并重命名为crs-setup.conf

cp /usr/local/owasp-modsecurity-crs-3.3-dev/crs-setup.conf.example   /usr/local/nginx/conf/modsecurity/
cd /usr/local/nginx/conf/modsecurity/
mv crs-setup.conf.example crs-setup.conf

3、复制rules文件夹到/usr/local/nginx/conf/modsecurity/下，同时修改REQUEST-900-EXCLUSION-RULES-BEFORE-CRS.conf.example与RESPONSE-999-EXCLUSION-RULES-AFTER-CRS.conf.example两个文件的文件名，将".example"删除，可将自己写的规则放置于此两个文件中；

cp -rp  /usr/local/owasp-modsecurity-crs-3.3-dev/rules/  /usr/local/nginx/conf/modsecurity/
cd /usr/local/nginx/conf/modsecurity/rules/
mv REQUEST-900-EXCLUSION-RULES-BEFORE-CRS.conf.example  REQUEST-900-EXCLUSION-RULES-BEFORE-CRS.conf
mv RESPONSE-999-EXCLUSION-RULES-AFTER-CRS.conf.example  RESPONSE-999-EXCLUSION-RULES-AFTER-CRS.conf

4、编辑nginx.conf

在http或server节点中添加以下内容（在http节点添加表示全局配置，在server节点添加表示为指定网站配置）

ModSecurityEnabled on;  
ModSecurityConfig modsecurity/modsecurity.conf;

5、编辑modsecurity.conf

SecRuleEngine DetectionOnly改为SecRuleEngine On

同时在文件末尾添加以下内容：

Include crs-setup.conf
Include rules/*.conf

六、重新加载Nginx测试效果

/usr/local/nginx/sbin/nginx -s reload