GeoIP blocking and redirecting on Apache

Recently I was asked to configure a WordPress install to block any traffic from Russia, and redirect any traffic from the USA to another US-centric site.

First thing to do is install mod-geoip for Apache (in my case on Ubuntu):

sudo apt install libapache2-mod-geoip  

Next uncomment the GeoIP database in the GeoIP conf file (/etc/apache2/mods-available/geoip.conf):

<IfModule mod_geoip.c>  
  GeoIPEnable On
  GeoIPDBFile /usr/share/GeoIP/GeoIP.dat

Restart Apache:

sudo systemctl restart apache2  

With GeoIP enabled we can apply our block and redirect in .htaccess

GeoIPEnable On

# deny for Russia

# redirect for USA
RewriteEngine on  
RewriteCond %{ENV:GEOIP_COUNTRY_CODE} ^(US)$  
RewriteRule ^(.*)$$1 [L]  

A list of ISO Alpha-2 country codes can be found on WikiPedia, and many other places online.