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bgraham

join:2001-03-15
Smithtown, NY

1 edit

What is Teredo?

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My FIOS router suddenly seems to have a bunch of ports opened my something called Teredo. A Google search does not seem to get me much info except that it is a tunnel for IPV6.

I did a port scan at GRC of a couple of the forwarded ports and they show up as stealthed.

Anyone know what Teredo is? I deleted the rules for the port forwarding after saving the config file and all seems to be working.

OOPS, edit, I have FIOS with the Actiontec router and it's ethernet not coax..


Smith6612
Premium,MVM
join:2008-02-01
North Tonawanda, NY
kudos:24
Reviews:
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1 edit

Teredo is just a medium for allowing IPv6 communication over IPv4 networks. The drawback on it is you cannot exactly perform DNS to an IPv6 server over Teredo.

Running Torrents, Windows Vista, or Windows 7 by any chance? I'm not sure if OS-X performs IPv6 functions out of the box without enabling it like it is with some flavors of Linux. Windows for sure does.


bgraham

join:2001-03-15
Smithtown, NY

Running Windows 7 as a dual boot on an Acer Netbook, probably for a couple of months.
Unfortunately I cannot remember the last time I actually looked at the router so I cannot say when these new rules appeared.
With that said, the IP 192.168.1.4 is my desktop machine and that has only run XP and has since 2003.

I did find this: »msdn.microsoft.com/en-us/library···%29.aspx

It's dated 7-2-10 and does not mention Win7 but does mention XP with Sp2, so I guess anything could happen.

Not sure how a networked computer can change the router settings when it's correctly password protected (not admin / password etc)



Smith6612
Premium,MVM
join:2008-02-01
North Tonawanda, NY
kudos:24

Do you have UPnP enabled in the router? If you do, that's where it is coming from.


bgraham

join:2001-03-15
Smithtown, NY

Yes it was set. Just removed it.


bgraham

join:2001-03-15
Smithtown, NY

Everything works fine, wife's computer and my netbook, tried XP and Win7.



Smith6612
Premium,MVM
join:2008-02-01
North Tonawanda, NY
kudos:24

That's good. At the moment if you don't have much of a need for Teredo for visiting IPv6 addresses, the UPnP entries were simply unnecessary anyways.