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看到「The curious case of the Raspberry Pi in the network closet」這篇有趣的過程,先從開頭與最後面開始看。首先是他們在辦公室裡面發現有個奇怪的設備:


I checked the DNS logs and found the exact date and time when the Pi was first seen in the network. I checked the RADIUS logs to see which employee was at the premises at that time and I saw multiple error messages that a deactivated account tried to connect to wifi.

That deactivated account belongs to an ex employee who (for some reason) made a deal with management that he could still have a key for a few months until he moved all his stuff out of the building (don't ask..).

中間的過程還蠻有趣的,包括研究是什麼擴充卡 (以及用途),然後從 SD card 上面挖資料,配合 Google 找線索,還有透過 WiGLE 定位,以及透過內部系統交叉比對,最後找到兇手...

然後發現是離職員工以搬東西當作理由,讓他在離職後還有辦公室鑰匙而導致的 XDDD

WiGLE (Wireless Geographic Logging Engine)

WiGLE 是個蒐集無線網路資訊的服務 (i.e. SSID、mac address 以及定位位置),依照維基百科上的資料,WiGLE 計畫從 2001 年開始,到現在快十五年了:

The first recorded hotspot on WiGLE was uploaded in September 2001.

趁著最近 Pokémon Go 會跑來跑去,就順便幫忙蒐集資料了...

目前我蒐集資料的方式是透過 WiGLE 的 Android 應用程式 (Wigle Wifi Wardriving) 開著讓他背景跑,然後回到家以後上傳,過一陣子讓系統更新後就可以看到了。