wiki:doc/OONI/Tests/RSTPacketDetection

What it detects

  • Detects the presence of a DPI device that sends TCP RST packets when it detects an offending connection

Inputs

  • A list of IP:port pairs to be tested.

Experiment

  • A TCP Connect scan is made to the remote IP:PORT

Control

  • If for the TCP connect we get back a RST packet then there is a DPI device injecting RST packets.

Output

  • What IP:ports are being blocked using this technique.

Notes

This is the kind of censorship that is happening in china as illustrated in this paper: http://www.cl.cam.ac.uk/~rnc1/ignoring.pdf

Last modified 5 years ago Last modified on Jun 16, 2012, 5:07:21 PM