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Jun 15, 2020
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Alexander Hansen Færøy
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'''
What it detects
'''
**
What it detects
**
*
Detects the presence of a DPI device that sends TCP RST packets when it detects an offending connection
*
Detects the presence of a DPI device that sends TCP RST packets when it detects an offending connection
'''
Inputs
'''
**
Inputs
**
*
A list of IP:port pairs to be tested.
*
A list of IP:port pairs to be tested.
'''
Experiment
'''
**
Experiment
**
*
A TCP Connect scan is made to the remote IP:PORT
*
A TCP Connect scan is made to the remote IP:PORT
'''
Control
'''
**
Control
**
*
If for the TCP connect we get back a RST packet then there is a DPI device injecting RST packets.
*
If for the TCP connect we get back a RST packet then there is a DPI device injecting RST packets.
'''
Output
'''
**
Output
**
*
What IP:ports are being blocked using this technique.
*
What IP:ports are being blocked using this technique.
'''
Notes
'''
**
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
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