Unknown History entries

Hi.  I hope someone can clarify this.  I had a message from Norton pop up recently, regarding suspicious outgoing traffic, and asking me to do a Power Eraser scan.  I did this, and it found nothing.  Other scans have found nothing, and the Norton history log shows that a computer infection was blocked.  Since then, I have been seeing history entries I haven't seen before:

Category: Firewall - Activities
Rule \"Default Block SSDP \" rejected  UDP(17)  traffic with  (192.168.1.66  Port (59089) )"

Category: Firewall - Network and Connections
,Info,"Protecting your connection to a newly detected network on adapter \"Software Loopback Interface 1\" (IP address: 127.0.0.1).",

Category: Firewall - Network and Connections
Date & Time,Risk,Activity,Status,Recommended Action,Gateway IP Address
20/05/2016 07:22:33,Info,Connected to a public network. (Teredo tunnel adapter(::0)),Protected,.

 

These are coming up over and over again.  I have no idea what a Teredo tunnel is, but haven't seen this come up until recently.

Does anyone know if these suggest a problem?  Norton flags them up as "no action required", but I am a little worried as I haven't seen them until after the possible infection the other day.

Any help is much appreciated.

Thanks

Richard