No, that article doesn't help as you suggested, and in fact I already know everything mentioned in there. I think they are trying to sell a VPN because the word (acronym) is mentioned at least 20 times and right there on that page they advertise one and then some JS kicks off an in your face Ad on a VPN service (which today is a major marketing gimmick unless you know what you are doing).
I'm not trying to say Shodan is bad per say about why my VPN server address has a port show up there that seems to be related to DHT. I'm just trying to figure out WHY it's there and exactly what it is as it seems like the server is leaking users who use DHT like in a P2P App. Now if you place your cursor over the down vote in Severfault it reads some crap like I didn't do my research. Though, that could be a website default message for down votes.
Off topic, but as of this post it's a nice 70 at your location and right here I'm freezing at 35. LOL! I want to move to Florida myself or maybe even the keys.