Is Teredo Tunneling (AKA 6to4) enabled by default in XP?

[GeneralDzur]

I've been reading the Microsoft website and KB articles, but I can't figure it out.

We have some PC's on the corporate LAN that are registering IPv6 addresses in our DNS servers, but the problem is that we've NEVER enabled or used IPv6. We're still on XP SP1 for the most part, and no Advanced Networking Pack.

I guess I'm asking

- Is Teredo Tunneling (IPv6 tunneled through IPv4) on by default?
- Can a regular User configure it, or does it take an Administrator?
- Besides installing the Advanced Networking Pack (or XP SP2, which includes all of the ANP's functionality), is there another way to use TT?
- Can a regular user install the ANP?

- stephan

 

[bcastner]

On the Updates issue & installation issue for limited users: The Automatic Updates process runs as a service and you dont need to be logged on as an admin for AU to be able to detect, download or install updates. You could set Automatic Updates to install updates at a scheduled time. This way the updates will get installed even if you logged on as a non-admin (and even if you are not logged in at all). No configuration is possible unless an Administrator-priviliged user, or a member of the Group Network Configuration Operators.

Remember that Teredo tunneling is a transitional step because of the number of IPv4-only network devices.

Is Teredo Tunneling (IPv6 tunneled through IPv4) on by default?: Teredo Support in Microsoft Windows

The following table lists the versions of Microsoft Windows that include a Teredo client and host-specific relay and whether IPv6 and Teredo is enabled by default.

. Windows XP with Service Pack 1 (SP1) with the Advanced Networking Pack for Windows XP
IPv6 enabled by default: No
Teredo enabled by default: No

. Windows XP Service Pack 2 (SP2)
IPv6 enabled by default: No
Teredo enabled by default: No

. Windows Server 2003 Service Pack 1
IPv6 enabled by default: No
Teredo enabled by default: No

. Windows Vista (now in beta testing)
IPv6 enabled by default: Yes
Teredo enabled by default: Yes

(In the final version of Windows Vista, the Teredo component will be enabled but inactive by default. In order to become active, a user must either install an application that needs to use Teredo, or choose to change firewall settings to allow an application to use Teredo.)

. Windows Server "Longhorn" (now in beta testing)
IPv6 enabled by default: Yes
Teredo enabled by default: No

 

[GeneralDzur]

Thanks for the info Bcastner. Unfortunately I've read that doc but it didn't answer my questions.

I can't figure out how these people (they're mostly remote / VPN users) are able to have 6to4 running, or get IPv6 addresses. I don't think the Advanced Networking Pack installs through Windows Update, and we sure haven't loaded it or SP2 on their machines.

I found this in the article:

""When you install the Advanced Networking Pack for Windows XP, your computer is automatically configured to enable the IPv6 Teredo client. Typically, you do not have to modify this configuration. However, if you must change these settings, use the netsh interface ipv6 command-line utility." KB817778 (link)"

- stephan

 

[bcastner]

Teredo is enabled if IPv6 is enabled.
IPv6 is enabled if you receive and install through Windows Update .NET Framework 2.0 redistributable

By the way, Teredo and 6to4 are different tunnels and have no relationship or dependency to each other.

 

[GeneralDzur]

By the way, Teredo and 6to4 are different tunnels and have no relationship or dependency to each other.

Ah, thanks for the clarification. A completewhois.com lookup says they're using 6to4. I didn't know they were different (thought Teredo was Microsofts name for 6to4).

Thanks also for the info about the .NET framework. I'll look into that.

- stephan