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.