NGINX IPv6 Rate Limiting

Use with realip module.

map $binary_remote_addr $subnet {
    "~^(\C{8})"         $1;
    default             $binary_remote_addr;
}

limit_req_zone $subnet zone=one:10m rate=1r/s;

References

• https://mailman.nginx.org/pipermail/nginx/2021-April/060557.html