在server再加一层，注意注意不是在原来的基础上就行修改

server {
  listen 80 default;
  server_name _;
  return 403;
}

配置文件参考

lua_package_path "/u01/install/nginx/waf/?.lua";
lua_shared_dict limit 10m;
init_by_lua_file /u01/install/nginx/waf/init.lua;
access_by_lua_file /u01/install/nginx/waf/waf.lua;
server {
  listen 80 default;
  server_name _;
  return 403;
}
server {
listen 80;
server_name www.phoebus1.com;
root /u01/code;
index index.html index.php;
location ~ \.php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
}

这样我们就实现了网站必须用域名打开，如果用ip打开就会报403错误