Adding geoip module and instituting a deny variable for vhosts to consume

roles/WebServer/files/nginx.conf

@@ -7,6 +7,7 @@ error_log              logs/error.log notice;
 error_log              logs/error.log info;
 
 load_module /usr/lib/nginx/modules/ngx_http_modsecurity_module.so;
+load_module /usr/lib/nginx/modules/ngx_http_geoip2_module.so;
 
 events {
     worker_connections 1024;
@@ -24,6 +25,8 @@ http {
     keepalive_timeout  65;
     gzip               on;
 
+    include conf/geoip.conf;
+
     # Redirect all HTTP to HTTPS
     server {
 

roles/WebServer/tasks/main.yml

@@ -9,6 +9,7 @@
      - nginx
      - libmodsecurity
      - nginx-mod-modsecurity
+     - nginx-mod-geoip2
      - php
      - php-fpm
 
@@ -103,6 +104,27 @@
      mode: 0660
    register: secconf
 
+ - name: Populate GeoIP config
+   become: yes
+   template:
+     src: conf/geoip.conf.j2
+     dest: /etc/nginx/conf/geoip.conf
+     owner: http
+     group: http
+     mode: 0660
+   register: geoipconf
+
+ - name: Ensure MaxMindDB is present
+   become: yes
+   file:
+     path: /etc/nginx/conf/maxmind-geoip2.mmdb
+     state: file
+     owner: http
+     group: http
+     mode: 0440
+     # This requires a https://maxmind.com/ account, so the source will have to come from that site.
+     # This file should be the current country database.
+
  - name: Clone OWASP-CRS
    ignore_errors: true
    become: yes
@@ -148,7 +170,7 @@
 
  - name: Ensure service is started
    become: yes
-   when: conf.changed or confd.changed or secconf.changed or baseconf.changed or modsecconf.changed
+   when: conf.changed or confd.changed or geoipconf.changed or secconf.changed or baseconf.changed or modsecconf.changed
    service:
      name: "{{ item }}"
      enabled: yes

roles/WebServer/templates/conf/geoip.conf.j2

@@ -0,0 +1,28 @@
+# Load database and set variables from the database.
+geoip2 /etc/nginx/conf/maxmind-geoip2.mmdb {
+    auto_reload 60m;
+    $geoip2_metadata_country_build metadata build_epoch;
+    $geoip2_data_country_code country iso_code;
+    $geoip2_data_country_name country names en;
+}
+fastcgi_param COUNTRY_CODE $geoip2_data_country_code;
+fastcgi_param COUNTRY_NAME $geoip2_data_country_name;
+
+# Allow LAN and operational countries.
+geo $lan {
+    default 0;
+    {{ main_subnet }}/{{ netmask }} 1;
+}
+map $geoip2_data_country_code $allowed_country {
+    default 0;
+{% for country in operational_countries %}
+    {{ country }} 1;
+{% endfor %}
+}
+
+# Define the deny variable such that LAN & country requests are allowed.
+# Thanks to https://stackoverflow.com/a/64071860 for the example
+map $lan$allowed_country $deny {
+    default 0;
+    00 1;
+}