$ sudo iwlist scan
eth0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
wlan0 Scan completed :
Cell 01 - Address: F8:D1:11:79:D2:50
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=63/70 Signal level=-47 dBm
Encryption key:on
ESSID:"ARENAXXX"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=000000007625cc25
Extra: Last beacon: 20ms ago
IE: Unknown: 00084152454E41585858
IE: Unknown: 010882848B960C121824
IE: Unknown: 03010B
IE: Unknown: 2A0104
IE: Unknown: 32043048606C
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: 2D1A6C111BFF00000000000000000000000100000000000000000000
IE: Unknown: 3D160B000400000000000000000000000000000000000000
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
Cell 02 - Address: 1C:BD:B9:91:96:5A
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=32/70 Signal level=-78 dBm
Encryption key:on
ESSID:"dd-wrt"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=0000001bc47af9ff
Extra: Last beacon: 384ms ago
IE: Unknown: 000664642D777274
IE: Unknown: 010882848B961224486C
IE: Unknown: 030106
IE: Unknown: 2A0100
IE: Unknown: 32040C183060
IE: Unknown: 2D1A6C0117FF000000000000000000000000000000000C0000000000
IE: Unknown: 3D1606000400000000000000000000000000000000000000
IE: Unknown: 3E0100
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: 0B0501000A127A
IE: Unknown: DD07000C4304000000
IE: Unknown: 0706444520010D10
$ dmesg | tail -20
[ 2157.920871] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 2157.920875] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 2158.490628] wlan0: authenticate with f8:d1:11:79:d2:50
[ 2158.493988] wlan0: send auth to f8:d1:11:79:d2:50 (try 1/3)
[ 2158.496247] wlan0: authenticated
[ 2158.498454] wlan0: associate with f8:d1:11:79:d2:50 (try 1/3)
[ 2158.502050] wlan0: RX AssocResp from f8:d1:11:79:d2:50 (capab=0x411 status=0 aid=3)
[ 2158.504904] wlan0: associated
[ 2160.462006] wlan0: deauthenticating from f8:d1:11:79:d2:50 by local choice (reason=3)
[ 2160.490526] cfg80211: All devices are disconnected, going to restore regulatory settings
[ 2160.490530] cfg80211: Restoring regulatory settings
[ 2160.490533] cfg80211: Calling CRDA to update world regulatory domain
[ 2160.493452] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 2160.493455] cfg80211: World regulatory domain updated:
[ 2160.493455] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 2160.493457] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 2160.493458] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 2160.493459] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 2160.493460] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 2160.493461] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)