<s>
Tcpkill	B-Protocol
is	O
a	O
network	B-Application
utility	I-Application
program	O
that	O
can	O
be	O
used	O
to	O
terminate	O
connections	O
to	O
or	O
from	O
a	O
particular	O
host	O
,	O
network	O
,	O
port	O
,	O
or	O
combination	O
of	O
all	O
.	O
</s>
<s>
These	O
programs	O
take	O
standard	O
Berkeley	B-Protocol
Packet	I-Protocol
Filter	I-Protocol
(	O
BPF	O
)	O
filters	O
.	O
</s>
<s>
It	O
is	O
a	O
good	O
idea	O
to	O
either	O
redirect	O
the	O
output	O
into	O
nothingness	O
(	O
>	O
2>	O
/dev/null	O
1>	O
/dev/null	O
)	O
or	O
into	O
a	O
file	O
for	O
later	O
analysis	O
(	O
>	O
file.tcpkill	O
)	O
.	O
</s>
<s>
Tcpkill	B-Protocol
can	O
be	O
used	O
to	O
create	O
a	O
DoS	O
attack	O
within	O
a	O
WAN	O
or	O
LAN	O
,	O
and	O
this	O
can	O
be	O
done	O
by	O
using	O
a	O
sniffer	O
like	O
dsniff	B-Protocol
or	O
tcpdump	B-Protocol
to	O
look	O
at	O
the	O
packets	O
that	O
are	O
being	O
transmitted	O
and	O
to	O
pick	O
a	O
target	O
that	O
you	O
want	O
to	O
deny	O
service	O
.	O
</s>
<s>
This	O
is	O
a	O
description	O
of	O
one	O
of	O
the	O
various	O
dsniff	B-Protocol
programs	O
.	O
</s>
<s>
This	O
text	O
belongs	O
to	O
the	O
dsniff	B-Protocol
“	O
README	O
”	O
written	O
by	O
the	O
author	O
Dug	O
Song	O
:	O
</s>
<s>
Name	O
Description	O
tcpkill	B-Protocol
Kills	O
specified	O
in-progress	O
TCP	O
connections	O
(	O
useful	O
for	O
libnids-based	O
applications	O
which	O
require	O
a	O
full	O
TCP	O
3-whs	O
for	O
TCB	O
creation	O
)	O
.	O
</s>
