Millions of devices


#1

If one is selling lots of devices with web interface, it may not make sense to use Letsencrypt service built-in because it requires generating unique domain names which are not user-friendly?


#2

Are we want routers that open its admin page to internet?


#3

It depends! There are two basic aporoaches in common use:

  1. generate a unique DNS name and make it publicly resolvable, then have the devices generate certificates for those names, or
  2. have a cloud service with a single name that communicates with the devices.