Thank you! I'm sure there are plenty of weird ports and such open on many networks, visible to Shodan currently, it's index is massive and you can query a lot of stuff with a paid plan.

There is often a debate around sites like Shodan and how useful they are in terms of legitimate use cases vs potential evil, but I feel this promotes Shodan as an ethical tool as it intends to be, rather than a tool for hackers. Of course, it will potentially help bad actors, but because it is a paid service with limitations on public access searches, this should discourage a lot of people and instead those who wish to use it for more ethical purposes can. It was very useful for my analysis and investigation on an external network I'd normally have no visibility of.