Some data Re: Again: Number of Firewall/NAT Users

[Grenville Armitage <gja at ureach.com>]

Jiri Kuthan wrote:
	[..]
> I would like to re-raise the question:
> 
> "is anyone aware of any estimations of fraction of Internet users
> who are behind firewalls and NATs?"

So, this question piqued my interest. Figured I'd take a
bash at estimating NAT usage using the online QuakeIII community
as a reference. Cobbled together two Q3 servers, logged client
port numbers, and looked for NAPT 'fingerprint' of clients coming
in on unexpected UDP ports (Q3 client side seems to always use
27960 if not mangled by NAPT). Using an indirect, and somewhat
arm-wavy method I estimate between 18 and 19% of the players
on my servers were behind NAT boxes. A bit more discussion is
at:

http://members.home.net/garmitage/things/nat-quake3.html

(Usual caveats: analysis may have entirely missed the point,
clicking on the link voids your warranty, life is too short,
etc..)

cheers,
gja
________________________________________________________________________
Grenville Armitage                    http://members.home.net/garmitage/