As mentioned you are running IPv6 over UDP. I know it looks strange but you'll get used to it.

IPv6 was first introduced in WinXP SP1 with the 817778 "Advanced Networking Pack" update, reference info here: http://support.microsoft.com/default...n-us;817778#10

The "fe80:" portion you noticed signifies a local link, whereas if you were to see "3FFE " "2001" or "2002" it would mean you have a actual external IPv6 address (routable).

At this point in time no ISP (I know of) uses IPv6 for public use and it will only be used in your local network if you have IPv6 routers, IPv6 managed switches or use translating software to communicate with an external IPv6 address. (Translating software encapsulates the IPv6 with IPv4 packets for travelling across the internet)

As mentioned, there are IPv6 translation services for those who wish to run IPv6 on a IPv4 internet.

To install IPv6, at a command line (shell), type:
"c:\ netsh interface ipv6 install"
THEN
"c:\ netsh interface ipv6 set privacy disabled persistent"

To uninstall IPv6, at a command line (shell), type:
"c:\ netsh interface ipv6 uninstall"
then reboot to finish the uninstall.

Unless specifically supported, IPv4 hardware and software firewalls do not stop IPv6 traffic, to include breaches. To find out why, read this link: http://support.microsoft.com/default...b;en-us;306203