How to drop a packet

[Tom Parquette]

Matin Tamizi wrote:
> I'm using a FreeBSD box as a router in a test network.  For the tests that I am running, I need to be able to drop random packets and observe the effects (responsiveness).
> 
> What utilities in FreeBSD or C will allow me to perform the function of dropping a random packet?
> 
> Thank you,
> Matin
> 
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I've never used it but you might want to look at DUMMYNET.  From the man 
page (man dummynet):


DUMMYNET(4)            FreeBSD Kernel Interfaces Manual

NAME
      dummynet -- traffic shaper, bandwidth manager and delay emulator

DESCRIPTION
      The dummynet system facility permits the control of traffic going 
through
      the various network interfaces, by applying bandwidth and queue 
size lim-
      itations, implementing different scheduling and queue management poli-
      cies, and emulating delays and losses.