These values need to be set like this: OPENVPN_MSSFIX = 0 (or other up to 9999. See wiki URL in description for this setting.) SERVER_COUNTRIES = Canada (uses full country names, not 2 letter code) FIREWALL_OUTBOUND_SUBNETS = <whatever your private local network IP address range is> (like 192.168.1.0/24, if your home network assigns addresses between 192.168.1.2 and 192.168.1.254) I'd recommend looking up guides for how to setup Gluetun, like the videos by SpaceInvaderOne on YouTube, or following the setup steps in the gluetun-wiki. There's URLs under each variable in the template that point to a little more info.