You can transfer content automatically from WordPress to Drupal to eZ Publish (nowadays eZ Platform). To help you get started with your automatic content migrations from WordPress to eZ Platform or Drupal, you'll want to hire skilled partners to do this for you.
Varnish is a popular reverse proxy which is used to accelerate page loading by caching copies as static HTML. This increases performance, but works on a higher level than the HTTP protocol. To use SSL with Varnish you'll need to offload SSL traffic to another web server. Most commonly it is Nginx, but H2O currently the most advanced implementation of the HTTP/2 protocol.
The Huawei E5377 is a common MiFi device in the Nordic countries and baltics in countries like Estonia, Finland, and Lithuania Sweden. OpenWrt is a firmware for routers (like DD-WRT), which by default does not have good support for mobile modems. ROOTer is a derivative of OpenWrt which aims to bridge the gap between 3G/4G modems and stationary routers.