No mentioning of this on the website itself.. The vibe i get from reading the FaQ is just "plug it in and you are good to go" basically.
https://netduma.com/support/faqs/will-this-work-with-cable-dsl-or-my-broadband/
https://netduma.com/support/faqs/will-this-work-with-my-isp-connection/
So how do i test all this? Just ping the netduma and look for lagspikes??..