iwlist scan output incorrect?

[Vitorio Okio]

"jim barnes" <mail.list.mail at gmail.com> wrote in message 
news:200803162224.39496.mail.list.mail at google.com...
> On Sunday 16 March 2008 07:37:57 pm Vitorio Okio wrote:
>> I'm using WRT54G router with DD-WRT firmware. My Wireless AP is set 
>> to
>> use WPA2-PSK/AES.  From what I know DD-WRT does not fall back to 
>> TKIP in
>> such setting independently of a client request.
>>
>> However when I'm running 'iwlist scan' on my Gutsy using bcm43xx
>> restricted driver the output is as follows:
>>
>> eth1 Scan completed :
>> Cell 01 - Address: XX:XX:XX:XX:XX:XX
>> ESSID:"MyESSID"
>> Protocol:IEEE 802.11g
>> Mode:Master
>> Channel:9
>> Frequency:2.452 GHz (Channel 6)
>> Encryption key On
>> Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
>> 11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
>> 48 Mb/s; 54 Mb/s
>> Quality=93/100 Signal level=-57 dBm Noise level=-72 dBm
>> IE: IEEE 802.11i/WPA2 Version 1
>> Group Cipher : TKIP
>> Pairwise Ciphers (1) : TKIP
>> Authentication Suites (1) : PSK
>> Extra: Last beacon: 12ms ago
>>
>> At this point I'm not sure anymore what cipher I'm using on my
>> connection.  Is it possible that 'iwlist scan' provides an 
>> incorrect
>> output?
>>
>> Any suggestions, please?
>
> Using the same router/firmware/settings, I see what one would 
> expect:
>
> m6n:~ # iwlist eth1 scanning
> eth1      Scan completed :
>          Cell 01 - Address: 00:0F:66:39:DC:1A
>                    ESSID:"GoPlayElsewhere!"
>                    Protocol:IEEE 802.11bg
>                    Mode:Master
>                    Channel:3
>                    Frequency:2.422 GHz (Channel 3)
>                    Encryption key:on
>                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 
> Mb/s
>                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 
> Mb/s
>                              48 Mb/s; 54 Mb/s
>                    Quality=55/100  Signal level=-67 dBm
>                    IE: IEEE 802.11i/WPA2 Version 1
>                        Group Cipher : CCMP
>                        Pairwise Ciphers (1) : CCMP
>                        Authentication Suites (1) : PSK
>                    Extra: Last beacon: 168ms ago
>
> My wireless card is an Intel 2200bg...

Yes, this is exactly that I would expect to see.

I start thinking that this is my card (Dell 1490 Dual Band WLAN Mini 
Card) reporting back to iwlist incorrect data.  I strongly believe 
that DD-WRT set to WPA2/AES only would reject the connection with a 
client attempting to use TKIP encryption instead.

But so far, after googling for a couple of hours, I could not find 
anybody confirming it.  And since its about security, and I'm quite 
new to Linux, it bothers me.