Great question @scherererer, and great to see a Roku Skill in the making. It’s one of the most upvoted Skills in our Skills Suggestions area.
I’m going to flag my colleagues @forslund and @steve.penrod on this one, as we’ve been discussing firewalls a lot recently in the context of security hardening.
There are also broader implications of having a UPnP service in mycroft-core - because it would make other Skills for third party devices easier to achieve.