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[Ninko]

Hi there,

I have a D-Link DIR-655, Hardware Version: A2, Firmware Version: 1.31EU.

I noticed recently my logs are being flooded with:

UPnP renew entry 255.255.255.255 <-> XXX.XXX.XXX.XXX:XXXXX <-> XXX.XXX.XXX.XXX:XXXXX UDP timeout:0 'Teredo'

It's coming from a Windows 7 computer on my network. I know Teredo is to do with IPv6 and Windows Remote Assistance uses it (I used remote assistance recently), so I don't know if that's the reason it's recently started doing it?

Is there anyway to stop this showing up in the logs?

Thanks


Ninko

[FurryNutz]

Thats just the log saying that it's seeing some IPv6 coming across. The Rev A do not support IPv6 so it's just logging it. I presume if you disabled IPv6 on the Windows 7 PC that it might not log it anymore.

[Ninko]

Hi FurryNutz,

Thanks for your reply.

What I'm trying to understand is why it's only recently started, the event is being logged so often I can't even see the past 24 hours in the log anymore (I used to be able to see at least a few days), when no more then a month ago I'd never even seen a reference to Teredo in the logs.

I have 2 entries in my Internet Sessions table now that are related to the UPnP Teredo event that never leave:

Local | NAT | Internet | Protocol | State | Dir | Priority | Time | Out
XXX.XXX.XXX.XXX:XXXXX | XXX.XXX.XXX.XXX:XXXXX | XXX.XXX.XXX.XXX:XXXX | UDP | - | Out | 128 | 296
XXX.XXX.XXX.XXX:XXXXX | XXX.XXX.XXX.XXX:XXXXX | *.*.*.*:* | UDP | - | -   128 | 0

There are 3 things I don't understand:

1. Why has it only recently started?
2. I have a Windows Vista Laptop, why does that not do this?
3. Why does Teredo feel the need to renew the UPnP entry many times a minute?

Thanks in advance.


Ninko

[FurryNutz]

Would only probably start log due to something you've either added or changed on your network or on the PCs. I would review any changes on the Windows 7 PC and see what has changed.

[Ninko]

Hi FurryNutz,

That's just it, I aint changed a thing! I don't even use that PC all that much.


Ninko

[FurryNutz]

Been any windows updates? If this only happens with this one PC, it's got to be something with this PC then. You might do some web search on Windows 7 and Teredo and see if you can find something. I know there as been some items like this before and usually it's alway been with Windows Vista or 7.

[Ninko]

Hi FurryNutz,

I THINK I have found the problem. It appears to do it when Windows Update KB2750841 is installed.

I still have the 2 entries in my Internet Sessions table but so far the UPnP events have stopped.

Now the only question is, is the update important enough to re-install it knowing that it makes my router logs not so useful.

Thanks for your help.


Ninko

[FurryNutz]

Glad you found it.

It maybe non-critical. You'll need to see what that update does and see if it's really needed.
One thing you could try as a test, disable uPnP and see what happens in the logs. 

[davevt31]

Just turn off IPv6 in your network adapters properties.

[FurryNutz]

That was mentioned.