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# googerteller
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Audible feedback on just how much your browsing feeds into Google.
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By bert@hubertnet.nl / https://berthub.eu/
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Makes a little bit of noise any time your computer sends a packet to a
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Google service, which excludes Google Cloud users.
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Demo video [in this tweet](https://twitter.com/bert_hu_bert/status/1561466204602220544)
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## How to compile
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You need a C++ compiler like `gcc-c++` and CMake for compiling the binary.
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You also need to install `libpcaudio` (`libpcaudio-dev` on Debian/Ubuntu, `pcaudiolib-devel` on Fedora/Red Hat).
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Then run:
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```
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cmake .
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make
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```
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## How to run
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```
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sudo tcpdump -n -l dst net 192.0.2.1/32 $(for a in $(cat goog-prefixes.txt); do echo or dst net $a; done) | ./teller
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```
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And then cry.
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## Problems
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If `tcpdump` complains about `Warning: Kernel filter failed: Cannot allocate memory`, try
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this first:
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```
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sudo sysctl net.core.optmem_max=204800
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```
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## Data source
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The list of Google services IP addresses can be found on [this Google
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support page](https://support.google.com/a/answer/10026322?hl=en).
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Note that this splits out Google services and Google cloud user IP
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addresses.
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