nginx.conf

worker_processes auto;
worker_rlimit_nofile 32768;

daemon off;

events
{
    worker_connections 16384;
    multi_accept on;
}

http
{
    variables_hash_max_size 1024;
    map_hash_max_size 2048;
    server_names_hash_max_size 1024;
    types_hash_max_size 1024;
    open_file_cache max=300;
    open_file_cache_errors on;

    keepalive_timeout 10;
    client_header_timeout 10;
    client_body_timeout 10;
    client_max_body_size 1M;
    send_timeout 10;

    types {
        application/json                      json map;
        application/javascript                js;
        audio/mpeg                            mp3;
        image/jpeg                            jpeg jpg;
        image/png                             png;
        image/x-icon                          cur ico;
        image/svg+xml                         svg;
        text/css                              css;
        text/html                             htm html;
        text/plain                            txt;
    }

    # default_type image/jpeg;
    msie_padding off;
    max_ranges 0;
    charset utf-8;
    index index.html index.htm;
    reset_timedout_connection on;
    keepalive_disable none;
    keepalive_requests 100;
    server_tokens off;
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";

    log_format main '$proxy_add_x_forwarded_for - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" $upstream_cache_status $upstream_connect_time $upstream_response_time $request_time';

    error_log /var/log/nginx/error.log warn;
    access_log /var/log/nginx/access.log main;
    log_not_found off;

    proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=cached:10m inactive=24h max_size=1g;
    limit_conn_zone $proxy_add_x_forwarded_for zone=conPerIp:50m;
    limit_req_zone $proxy_add_x_forwarded_for zone=reqPerSec:50m rate=3r/s;

    expires -1;

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;

    gzip                    on;
    gzip_comp_level         1;

    upstream ipindex-node {
        server ipindex-node:4000;
    }

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_connect_timeout       5s;
    proxy_send_timeout          5s;
    proxy_read_timeout          5s;
    proxy_pass_request_headers  on;
    underscores_in_headers      on;

    server {
        server_name     default;
        listen          80 default_server;
        root            /var/www/;

        proxy_cache             cached;
        proxy_cache_valid       200 1d;
        proxy_cache_use_stale   error timeout invalid_header updating http_500 http_502 http_503 http_504;

        # limit_req   zone=reqPerSec burst=10; # Uncomment for request throttling
        # limit_conn  conPerIp 10; # Uncomment for connections throttling

        location /favicon.ico {
            expires 86400;
            access_log off;
            return 204;
        }

        rewrite ^/([0-9.]+)$ /?ip=$1;

        location / {
            proxy_pass http://ipindex-node;
        }
    }
}