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A comment on The curious case of the Raspberry Pi in the network closet. Parent comment

Re:The curious case of the Raspberry Pi in the network closet by dataflow on Wednesday January 16, 2019 @06:21AM (#18919893)
True but there's also the MAC address...
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Re:The curious case of the Raspberry Pi in the network closet by est31 on Wednesday January 16, 2019 @07:00AM (#18920077)
You are right, you should definitely not feel safe when using a generic network name. In the file that OP posted, the MAC address was missing though. Doesn't mean that it wasn't present on the device. Android used to write the MAC address to logcat, nowadays it's off by default. Sometimes the MAC address of a network gets stored to wpa_supplicant.conf. I'm sure that NetworkManager reports the mac address in journald as well.
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Re:The curious case of the Raspberry Pi in the network closet by isoprophlex on Wednesday January 16, 2019 @06:58AM (#18920068)
This can be spoofed I guess?
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Re:The curious case of the Raspberry Pi in the network closet by jayalpha on Wednesday January 16, 2019 @10:26AM (#18921591)
Yes

macchanger (I use a custom script that works better for me. Also does magic in places with limited interned, e.g. free 100MB limit)

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