Example of Nginx setting the whitelist through the geo module

The original configuration:

http {
......

limit_conn_zone $binary_remote_addr zone=one:10m;
limit_req_zone $binary_remote_addr zone=fifa:10m rate=5r/s;

......
server {
......
limit_conn one 5;
limit_req zone=fifa burst=100;
......
}}

Whitelist configuration:

http {
......

geo $whiteiplist {
 default 1;
 127.0.0.1 0;
 10.10.0.0/24 0;
}
map $whiteiplist $limit {
 1 $binary_remote_addr;
 0 "";
}
limit_conn_zone $limit zone=one:10m;
limit_req_zone $limit zone=fifa:10m rate=5r/s;

......
server {
......
limit_conn one 5;
limit_req zone=fifa burst=100;
......
}}

Description:

The geo directive defines a whitelist of $whiteiplist, with a default value of 1, all restricted. If the client IP matches IP listed in the whitelist, the value of $whiteiplist is 0, so it is unrestricted.

The map directive maps the $whiteiplist value of 1, that is, the restricted IP, to the client IP. The whitelist IP, which maps the $whiteiplist value to 0, maps to an empty string.

The limit_conn_zone and limit_req_zone directives will be ignored if the key is null, leaving no restriction on the listed IP.