How to reset a TCP connection

[Olivier Nicole]

Hi,

On a mail server, I do some update of some lists on a daily basis,
using wget.

I am testing the script that will do the update, including some
timestamping with wget (hopefully). I want to be able to test various
combinations of parameters of wget for robust transmission, so I want
to simulate some network failure. 

How can I manually reset an established TCp connection?

TIA,

Olivier