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24 lines
1.1 KiB
24 lines
1.1 KiB
2 years ago
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title: Wifi traffic analysis on a gugelfrei fon
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date: 2022-04-20
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---
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Is the gugelfrei fon really successfully degoogled? Is any data sent to the known data sinks? Maybe the IMSI number to the SUPL host? For that I conducted wifi network dump of the android startup procedure. Here you can see in sequence network connectivity check, time sync and download of assistance data for gps (A-GPS).
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For the test setup I opened up a wifi hotspot on my desktop with [hostapd](https://wiki.archlinux.org/title/Software_access_point).
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```
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create_ap <wifi_device> <lan_device> <SSID> <PASSWORD>
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```
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Then I just sniffed on `<wifi_device>` with [wireshark](https://www.wireshark.org/).
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Tested device is a LG G3 d855 with [recent gugelfrei OS](https://cld.freedomhost.de/index.php/s/afgcJqXoDZQ8RCp).
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Results for captivity portal and timeserver:
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SUPL Server are not used. A-GPS data is fetched via XTRA Server:
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No traces of privacy violations here. See [full bootup wifi dump](/images/analysis/bootup.pcapng) for wireshark.
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