3. The Experiment

Here is the experiment:

  1. Open a window to an IPsec host and another window to an insecure host.

  2. Now start capturing packets.

  3. In the secure window, run the UNIX® command yes(1), which will stream the y character. After a while, stop this. Switch to the insecure window, and repeat. After a while, stop.

  4. Now run MUST on the captured packets. You should see something like the following. The important thing to note is that the secure connection has 93% (6.7) of the expected value (7.18), and the normal connection has 29% (2.1) of the expected value.

    % tcpdump -c 4000 -s 10000 -w ipsecdemo.bin
    % uliscan ipsecdemo.bin
    
    Uliscan 21 Dec 98
    L=8 256 258560
    Measuring file ipsecdemo.bin
    Init done
    Expected value for L=8 is 7.1836656
    6.9396 --------------------------------------------------------
    6.6177 -----------------------------------------------------
    6.4100 ---------------------------------------------------
    2.1101 -----------------
    2.0838 -----------------
    2.0983 -----------------

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