[119107] in North American Network Operators' Group
Re: {SPAM?} Re: IPv6 Deployment for the LAN
daemon@ATHENA.MIT.EDU (Bernhard Schmidt)
Sat Nov 7 07:16:54 2009
To: nanog@nanog.org
From: Bernhard Schmidt <berni@birkenwald.de>
Date: Sat, 7 Nov 2009 12:15:52 +0000 (UTC)
X-Complaints-To: usenet@ger.gmane.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Adrian Chadd <adrian@creative.net.au> wrote:
>> As already said, wireless in infrastructure mode (with access points)
>> always sends traffic between clients through the access point, so a
>> decent AP can filter this.
> How does the client determine that the traffic came from the AP versus
> another client?
I'm not exactly a specialist for wireless, but as far as I remember my
lectures the 802.11 has additional MAC fields for the wireless
source/destination. Stations always send to the AP, the AP retransmits
it to the station.
IIRC WPA/WPA2 even has some protection against stations forging the AP
MAC with the shared group key, but I don't remember any details.
Bernhard
