World of Warcraft may begin using IPv6 on Tuesday

Ray Soucy rps at
Wed Jun 8 17:18:35 UTC 2011

Just grabbed the Trial and tested it.

Verified that IPv6 is used for World of Warcraft on the Antonidas
server.  It works pretty well actually.

I see they replicated their practice of dropping all ICMP traffic for
IPv6.  Not sure that's the best idea.

Anyone know if they plan to leave it working now and possibly expand
it too all their servers?


On Wed, Jun 8, 2011 at 6:33 AM, Frank Bulk <frnkblk at> wrote:
> More here:
>        To test IPv6 in World of Warcraft, you'll need to edit your
> file and add the following line:
>                SET unlockIPv6 "1"
>        This will activate the IPv6 features. If your computer has
>        a valid IPv6 address, you'll be able to check the "Enable
>        IPv6" checkbox from the Network options in the World of
>        Warcraft client. Once in the game, you'll be able to see
>        which type of connection the client has made to the realms
>        next to the latency information.
> Frank
> -----Original Message-----
> From: Kevin Day [mailto:toasty at]
> Sent: Saturday, April 23, 2011 1:10 PM
> To: NANOG list
> Subject: World of Warcraft may begin using IPv6 on Tuesday
> For those that don't know, World of Warcraft is currently the largest online
> role playing game, with somewhere over 12 million subscribers.
> Version 4.1 of the game is expected to be released this Tuesday, which will
> be automatically pushed to all clients. The current Beta version of 4.1 has
> full IPv6 support. In the beta, it's automatically enabled if you have
> native IPv6 (non-6to4, non-Teredo). While Blizzard has been pretty silent
> about this, barring a last minute revert or delay of this patch, there are
> suddenly going to be a bunch more users that can potentially use IPv6. And
> these users are the type who are going to be especially sensitive to
> latency, jitter and packet loss, since this is a real-time game platform.
> For those of you with Help Desks who have to support users like this, the
> associated setting in the game's Options menu is apparently called "Enable
> IPv6 when available". It's apparently grayed out if you do not have IPv6 at
> all, unchecked by default if you are on 6to4 or Teredo, and checked by
> default if you are on native v6. The tooltip says: "Enables the use of IPv6,
> the technology behind the next-generation Internet. Requires IPv6
> connectivity to the internet. Checking this box without IPv6 connectivity
> may prevent you from playing WoW."
> Anyone from Activision/Blizzard who would like to chime in with more
> details? :)
> -- Kevin

Ray Soucy

Epic Communications Specialist

Phone: +1 (207) 561-3526

Networkmaine, a Unit of the University of Maine System

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