Configure the number of attempts to land a TCP RST within the session's current window (so that it is accepted by the receiving TCP). This sequence "strafing" is really only useful in passive mode. In inline mode the reset is put straight into the stream in lieu of the triggering packet so strafing is not necessary.
Each attempt (sent in rapid succession) has a different sequence number. Each
active response will actually cause this number of TCP resets to be sent. TCP
data (sent for react) is multiplied similarly. At most 1 ICMP unreachable is
sent, if and only if attempts 
0.
./configure --enable-active-response
config response: [device <dev>] [dst_mac <MAC address>] attempts <att>
<dev> ::= ip | eth0 | etc.
<att> ::= (1..20)
<MAC address> ::= nn:nn:nn:nn:nn:nn
(n is a hex number from 0-F)
device ip will perform network layer injection. It is probably a better choice to specify an interface and avoid kernel routing tables, etc.
dst_mac will change response destination MAC address, if the device is eth0, eth1, eth2 etc. Otherwise, response destination MAC address is derived from packet. Example:
config response: device eth0 dst_mac 00:06:76:DD:5F:E3 attempts 2