No more Teredo?

Hello I'm here with another question.

Long time ago I created a post about Teredu tunneling. One day I turned on my pc and found in norton history "Protecting your connection to a newly detected network on adapter Teredo Tunneling Pseudo Interface". And after that one day I had teredo in my norton history everyday

And now after a few months it disappeared. I didn't change anything or remove

I don't think it's very important but any possible reason why I can't see it anymore?