Using the GeoIP base, cdb server determines the client's vpn location (country) and offers the best vpn server for connection based on the client's location.
To enable work with the GeoIP database, the following lines must be written in the <appname>-node.cfg file:
[srv_vpn]
geoip_enabled=true
[resources]
geoip_db_path=share/geoip/GeoLite2-City.mmdb