TEREDO, port 53133 always open?

[yifan]

Vodafone Germany did a couple of resets on my gigabit modem a couple of times last month for "reasons" known only to Vodafone itself, so I had to reopen the ports I needed, and I just noticed something new : there is a service called "Teredo ". it points UDP traffic on port 53133 toward the device with the IP4 address ending in 252 on my LAN. I can not delete nor disable it, and I tried resetting the port forwarding rules, but it just reappears

Fun thing is : I don't have any device with that IP address, and nmap doesn't seem to find anything neither.

Anybody knows what's that's supposed to be?  https://vlc.onl

I might have to check what happens if I switch the modem to bridge mode, just because Vodafone's lack of respect for its non-commercial customers is really ##~## me off.

[AnnS]

You won't get any help on the UK Community  @yifan . Ask this question here

Vodafone Germany Community  

[Cynric]

This is the Vodafone GB forum. We are unlikely to be able to help.

[CrimsonLiar]

Teredo is a technology often used during the migration to IPv6, and can be implemented in a variety of ways.  If you don't already have IPv6 then it's probable that Vodafone Germany is looking to start the switchover.  So the device that you are seeing is probably a virtual device setup on the router.  As to the port being open, yup any open port can be a concern, but to anything other than the teredo virtual device (I'm not going to abbreviate that to VD) it's pretty much a sink hole!

In other words - DON'T PANIC!