[AusNOG] IPv6 and Xbox1 from NANOG59

[Mark ZZZ Smith]

----- Original Message -----
> From: Matthew Moyle-Croft <mmc at mmc.com.au>
> To: "AusNOG (AusNOG at lists.ausnog.net)" <ausnog at lists.ausnog.net>
> Cc: 
> Sent: Sunday, 13 October 2013 5:44 AM
> Subject: [AusNOG] IPv6 and Xbox1 from NANOG59
> 
> Hi,
> 
> One thing worth watching for operators is how Xbox1 will use IPv6 from a 
> Microsoft presentation at NANOG59.   Better get good at IPv6 before your gaming 
> customers start getting angry!
> 
> http://www.youtube.com/watch?v=VSjljW4clPM&list=PLO8DR5ZGla8j7_jnNYY3d8JB0HfdXe85X&index=22
> 

While IPv6 is better anyway for applications that have a natural peer-to-peer architecture, one of the reasons Microsoft probably did it was because Xbox 360 doesn't work between customers who are behind the same CGN:

"Assessing the Impact of Carrier-Grade NAT on Network Applications"
http://tools.ietf.org/html/rfc7021



Use of IPsec in transport mode is quite interesting and significant though. IPsec isn't necessary to get around any of the IPv4 CGN issues. IPsec in transport mode will detect middle boxes such as NATs/CGNs because they look like Man-In-The-Middle attacks (because they violate the packets' end-to-end integrity), so they may have decided to use it as a another method of detecting NATs/CGNs. Or it could be just that knowing that the packets received were actually the ones sent is valuable - perhaps there are game hacks which are implemented in some middle boxes that Microsoft would like to prevent.

> (I'd also suggest a few of the other presos from NANOG59 - especially the 
> Ladar Levinson from Lavabit interview - it's REALLY good - see here for full 
> list - http://www.youtube.com/playlist?list=PLO8DR5ZGla8j7_jnNYY3d8JB0HfdXe85X)
> 
> MMC
> 
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