<s>
Argus	O
–	O
the	O
Audit	B-Protocol
Record	I-Protocol
Generation	I-Protocol
and	I-Protocol
Utilization	I-Protocol
System	I-Protocol
is	O
the	O
first	O
implementation	O
of	O
network	O
flow	O
monitoring	O
,	O
and	O
is	O
an	O
ongoing	O
open	O
source	O
network	O
flow	O
monitor	O
project	O
.	O
</s>
<s>
Argus	O
is	O
used	O
by	O
many	O
universities	O
,	O
corporations	O
and	O
government	O
entities	O
including	O
US	O
DISA	O
,	O
DoD	O
,	O
DHS	O
,	O
FFRDCs	O
,	O
GLORIAD	B-Protocol
and	O
is	O
a	O
Top	O
100	O
Internet	O
Security	O
Tool	O
.	O
</s>
<s>
Argus	O
is	O
designed	O
to	O
be	O
a	O
real-time	B-General_Concept
situational	O
awareness	O
system	O
,	O
and	O
its	O
data	O
can	O
be	O
used	O
to	O
track	O
,	O
alarm	O
and	O
alert	O
on	O
wire-line	O
network	O
conditions	O
.	O
</s>
<s>
The	O
data	O
can	O
also	O
be	O
used	O
to	O
establish	O
a	O
comprehensive	O
audit	O
of	O
all	O
network	B-Protocol
traffic	I-Protocol
,	O
as	O
described	O
in	O
the	O
Red	O
Book	O
,	O
US	O
DoD	O
NCSC-TG-005	O
,	O
supplementing	O
traditional	O
Intrusion	O
detection	O
system	O
(	O
IDS	O
)	O
based	O
network	O
security	O
.	O
</s>
<s>
The	O
audit	O
trail	O
is	O
traditionally	O
used	O
as	O
historical	O
network	B-Protocol
traffic	I-Protocol
measurement	I-Protocol
data	O
for	O
network	B-Protocol
forensics	I-Protocol
and	O
Network	O
Behavior	O
Anomaly	O
Detection	O
(	O
NBAD	O
)	O
.	O
</s>
<s>
Argus	O
has	O
been	O
used	O
extensively	O
in	O
cybersecurity	O
,	O
end-to-end	B-Application
performance	O
analysis	O
,	O
and	O
more	O
recently	O
,	O
software-defined	O
networking	O
(	O
SDN	O
)	O
research	O
.	O
</s>
<s>
RMON	O
(	O
1995	O
)	O
and	O
IPFIX	B-Protocol
(	O
2001	O
)	O
.	O
</s>
<s>
Argus	O
is	O
composed	O
of	O
an	O
advanced	O
comprehensive	O
network	O
flow	O
data	O
generator	O
,	O
the	O
Argus	O
monitor	O
,	O
which	O
processes	O
packets	B-Protocol
(	O
either	O
capture	O
files	O
or	O
live	O
packet	B-Protocol
data	I-Protocol
)	O
and	O
generates	O
detailed	O
network	B-Protocol
traffic	I-Protocol
flow	O
status	O
reports	O
of	O
all	O
the	O
flows	O
in	O
the	O
packet	B-Protocol
stream	O
.	O
</s>
<s>
Argus	O
monitors	O
all	O
network	B-Protocol
traffic	I-Protocol
,	O
data	B-Protocol
plane	I-Protocol
,	O
control	B-Protocol
plane	I-Protocol
and	O
management	O
plane	O
,	O
not	O
just	O
Internet	B-Protocol
Protocol	I-Protocol
(	O
IP	O
)	O
traffic	O
.	O
</s>
<s>
Argus	O
captures	O
much	O
of	O
the	O
packet	B-Protocol
dynamics	O
and	O
semantics	O
of	O
each	O
flow	O
,	O
with	O
a	O
great	O
deal	O
of	O
data	O
reduction	O
,	O
so	O
you	O
can	O
store	O
,	O
process	O
,	O
inspect	O
and	O
analyze	O
large	O
amounts	O
of	O
network	O
data	O
efficiently	O
.	O
</s>
<s>
Argus	O
provides	O
reachability	O
,	O
availability	O
,	O
connectivity	O
,	O
duration	O
,	O
rate	O
,	O
load	O
,	O
good-put	O
,	O
loss	B-Protocol
,	O
jitter	O
,	O
retransmission	B-Protocol
(	O
data	O
networks	O
)	O
,	O
and	O
delay	O
metrics	O
for	O
all	O
network	O
flows	O
,	O
and	O
captures	O
most	O
attributes	O
that	O
are	O
available	O
from	O
the	O
packet	B-Protocol
contents	O
,	O
such	O
as	O
Layer	O
2	O
addresses	O
,	O
tunnel	O
identifiers	O
(	O
MPLS	B-Protocol
,	O
GRE	O
,	O
IPsec	B-Protocol
,	O
etc	O
...	O
)	O
,	O
protocol	O
ids	O
,	O
SAP	O
's	O
,	O
hop-count	O
,	O
options	O
,	O
L4	O
transport	O
identification	O
(	O
RTP	B-Protocol
detection	O
)	O
,	O
host	O
flow	O
control	O
indications	O
,	O
etc	O
...	O
Argus	O
has	O
implemented	O
a	O
number	O
of	O
packet	B-Protocol
dynamics	O
metrics	O
specifically	O
designed	O
for	O
cyber	O
security	O
.	O
</s>
<s>
Argus	O
detects	O
human	O
typing	O
behavior	O
in	O
any	O
flow	O
,	O
but	O
of	O
particular	O
interest	O
is	O
key-stroke	O
detection	O
in	O
encrypted	O
SSH	O
tunnels	B-Protocol
.	O
</s>
<s>
Argus	O
is	O
an	O
Open	O
Source	O
(	O
GPL	B-License
)	O
project	O
,	O
owned	O
and	O
managed	O
by	O
QoSient	O
,	O
LLC	O
,	O
and	O
has	O
been	O
ported	O
to	O
most	O
operating	O
systems	O
and	O
many	O
hardware	O
accelerated	O
platforms	O
,	O
such	O
as	O
Bivio	O
,	O
Pluribus	O
,	O
Arista	O
,	O
and	O
Tilera	O
.	O
</s>
<s>
OS	B-Operating_System
X	I-Operating_System
:	O
Unix	O
operating	O
system	O
developed	O
by	O
Apple	O
Inc	O
.	O
</s>
