05 Jul 2012

WLAN-Diagnose unter Mac OS X

Mit einem mitgelieferten Kommandozeilen-Utility lassen sich Informationen über WLANs anzeigen, die so per default in der GUI nicht zu finden sind.

WLANs anzeigen

 sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -s
                          SSID BSSID             RSSI CHANNEL HT CC SECURITY (auth/unicast/group)
                         rohan 00:1b:2f:fa:de:6c -93  3       Y  -- WEP
                      isengard 00:18:4d:f1:4d:15 -50  3       N  DE WEP
                   WLAN-A64905 74:31:70:a6:49:a9 -93  8       Y  -- WPA2(PSK/AES/AES) 
                    helmsklamm 00:04:e2:c2:9e:cc -17  10      N  -- NONE

weitere Details

sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I
   agrCtlRSSI: -49
   agrExtRSSI: 0
  agrCtlNoise: -96
  agrExtNoise: 0
        state: running
      op mode: station 
   lastTxRate: 54
      maxRate: 54
lastAssocStatus: 0
  802.11 auth: open
    link auth: unknown
        BSSID: 0:18:4d:f1:4d:15
         SSID: isengard
          MCS: -1
      channel: 3 

Sniffing on channel 11:

sudo /usr/libexec/airportd en1 sniff 11

Some things to note:

You will be prompted to enter in your account password for verification.
You cannot specify the name of the capture file or where you will place the output.
You will lose any wireless connectivity to your network while the capture is occurring.