How to set directory whitelist and ip whitelist in nginx

1. Set the directory whitelist: There is no restriction on the specified request path. If there is no restriction on the request path to the api directory, it can be written as

server{
    location /app {
      proxy_pass http://192.168.1.111:8095/app;

      limit_conn conn 20;

      limit_rate 500k;

      limit_req zone=foo burst=5 nodelay; 
    }
    location /app/api {
      proxy_pass http://192.168.1.111:8095/app/api
    }
}
# 因nginx会优先进行精准匹配，所以以上写法即接触了对api目录下属路径的限制

2. To set the IP whitelist, you need to use nginx geo and nginx map

If there is no manual deletion (--without-http_geo_module or --without-http_map_module), nginx loads it by default ngx-http-geo-module and ngx-http-map-module related content;

ngx-http-geo-module can be used to create variables, the variable value depends on the client ip address;

ngx-http-map-module can create variables based on other variables and variable values, which allows classification, or mapping multiple variables to different values ​​​​and storing them in one variable;

nginx geo 格式说明
 
syntax ( 语法格式 ): geo [$address] $variable { ... }
default ( 默认 ): -
content ( 配置段位 ): http
nginx map 格式说明
syntax ( 语法格式 ): map string $variable { ... }
default ( 默认 )：-
content ( 配置段位 ): http
 
白名单配置示例
 
http{
   # ... 其他配置内容
   #定义白名单ip列表变量
   geo $whiteiplist {
     default 1 ;
     127.0.0.1/32 0;
     64.223.160.0/19 0;
   }
   #使用map指令映射将白名单列表中客户端请求ip为空串
   map $whiteiplist $limit{
     1 $binary_remote_addr ;
     0 "";
   }
   #配置请求限制内容
   limit_conn_zone $limit zone=conn:10m;
   limit_req_zone $limit zone=allips:10m rate=20r/s;
   server{
     location /yourapplicationname {
       proxy_pass http://192.168.1.111:8095/app;
       limit_conn conn 50;
       limit_rate 500k;
       limit_req zone=allips burst=5 nodelay;
     }
   }
}
白名单配置可用于对合作客户，搜索引擎等请求过滤限制
 
#（特殊情况处理）
 
#如果想仅限制指定的请求，如：只限制post请求，则：
http{
   # 其他请求..
   #请求地址map映射
   map $request_method $limit {
     default "";
     post $binary_remote_addr;
   }
   #限制定义
   limit_req_zone $limit zone=reqlimit:20m rate=10r/s;
   server{
     ... #与普通限制一致
   }
}
#在此基础上，想进行指定方法的白名单限制处理，则：
http{
   #...
   #定义白名单列表
   map $whiteiplist $limitips{
     1 $binary_remote_addr;
     0 "";
   }
 
   #基于白名单列表，定义指定方法请求限制
   map $request_method $limit {
     default "";
     # post $binary_remote_addr;
     post $limitips;
   }
 
   #对请求进行引用
   limit_req_zone $limit zone=reqlimit:20m rate=10r/s;
 
   #在server中进行引用
   server{
     #... 与普通限制相同
   }
}

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