DNS configuration

Most of all providers are offering their own DNS server. Please remember, if you're using more than one provider and only one DNS server, that some providers are only routable from their own network.

It's better to configure your CAR-A-WAN in that way, that your DNS behind the cellular network. If you if you don't do so, it's possible to have problems if the CAR-A-WAN re-route the DNS request to the second module (of a foreign provider) which was first requested though the first module.