TrackMe is a custom, low-level http/1 and h2 server, that responds with the fine details about the request made.
It returns the ja3, akamai h2 fingerprint, header + header order, h2 frames, and much more.
You first need to generate the certificate.pem and the key.pem files.
$ mkdir certs
$ openssl req -x509 -newkey rsa:4096 -keyout certs/key.pem -out certs/chain.pem -sha256 -days 365 -nodes
Then, you need to copy the example config (and maybe edit it)
$ cp config.example.json config.json
$ nano config.json
...
You can build a binary by running go build -o TrackMe *.go
After that, just run the binary (sudo ./TrackMe
)
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TCP fingerprinting wikipedia (The german version is better)
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TCP/IP stack fingerprinting (lots of other links)