<s>
Wireshark	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
packet	B-Protocol
analyzer	I-Protocol
.	O
</s>
<s>
It	O
is	O
used	O
for	O
network	B-Architecture
troubleshooting	O
,	O
analysis	O
,	O
software	O
and	O
communications	O
protocol	O
development	O
,	O
and	O
education	O
.	O
</s>
<s>
Originally	O
named	O
Ethereal	B-Language
,	O
the	O
project	O
was	O
renamed	O
Wireshark	B-Language
in	O
May	O
2006	O
due	O
to	O
trademark	O
issues	O
.	O
</s>
<s>
Wireshark	B-Language
is	O
cross-platform	B-Operating_System
,	O
using	O
the	O
Qt	B-Language
widget	B-Library
toolkit	I-Library
in	O
current	O
releases	O
to	O
implement	O
its	O
user	O
interface	O
,	O
and	O
using	O
pcap	B-Language
to	O
capture	O
packets	O
;	O
it	O
runs	O
on	O
Linux	B-Application
,	O
macOS	B-Application
,	O
BSD	B-Operating_System
,	O
Solaris	B-Application
,	O
some	O
other	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
,	O
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
There	O
is	O
also	O
a	O
terminal-based	O
(	O
non-GUI	O
)	O
version	O
called	O
TShark	B-Language
.	O
</s>
<s>
Wireshark	B-Language
,	O
and	O
the	O
other	O
programs	O
distributed	O
with	O
it	O
such	O
as	O
TShark	B-Language
,	O
are	O
free	B-Application
software	I-Application
,	O
released	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
version	O
2	O
or	O
any	O
later	O
version	O
.	O
</s>
<s>
Wireshark	B-Language
is	O
very	O
similar	O
to	O
tcpdump	B-Protocol
,	O
but	O
has	O
a	O
graphical	B-Application
front-end	B-Architecture
and	O
integrated	O
sorting	O
and	O
filtering	O
options	O
.	O
</s>
<s>
Wireshark	B-Language
lets	O
the	O
user	O
put	O
network	B-Protocol
interface	I-Protocol
controllers	I-Protocol
into	O
promiscuous	B-Protocol
mode	I-Protocol
(	O
if	O
supported	O
by	O
the	O
network	B-Protocol
interface	I-Protocol
controller	I-Protocol
)	O
,	O
so	O
they	O
can	O
see	O
all	O
the	O
traffic	O
visible	O
on	O
that	O
interface	O
including	O
unicast	O
traffic	O
not	O
sent	O
to	O
that	O
network	B-Protocol
interface	I-Protocol
controller	I-Protocol
's	O
MAC	O
address	O
.	O
</s>
<s>
However	O
,	O
when	O
capturing	O
with	O
a	O
packet	B-Protocol
analyzer	I-Protocol
in	O
promiscuous	B-Protocol
mode	I-Protocol
on	O
a	O
port	O
on	O
a	O
network	B-Protocol
switch	I-Protocol
,	O
not	O
all	O
traffic	O
through	O
the	O
switch	O
is	O
necessarily	O
sent	O
to	O
the	O
port	O
where	O
the	O
capture	O
is	O
done	O
,	O
so	O
capturing	O
in	O
promiscuous	B-Protocol
mode	I-Protocol
is	O
not	O
necessarily	O
sufficient	O
to	O
see	O
all	O
network	B-Architecture
traffic	O
.	O
</s>
<s>
Port	B-Protocol
mirroring	I-Protocol
or	O
various	O
network	B-Device
taps	I-Device
extend	O
capture	O
to	O
any	O
point	O
on	O
the	O
network	B-Architecture
.	O
</s>
<s>
On	O
Linux	B-Application
,	O
BSD	B-Operating_System
,	O
and	O
macOS	B-Application
,	O
with	O
libpcap	B-Language
1.0.0	O
or	O
later	O
,	O
Wireshark	B-Language
1.4	O
and	O
later	O
can	O
also	O
put	O
wireless	B-General_Concept
network	I-General_Concept
interface	I-General_Concept
controllers	I-General_Concept
into	O
monitor	B-Protocol
mode	I-Protocol
.	O
</s>
<s>
If	O
a	O
remote	O
machine	O
captures	O
packets	O
and	O
sends	O
the	O
captured	O
packets	O
to	O
a	O
machine	O
running	O
Wireshark	B-Language
using	O
the	O
TZSP	B-Protocol
protocol	O
or	O
the	O
protocol	O
used	O
by	O
OmniPeek	B-Protocol
,	O
Wireshark	B-Language
dissects	O
those	O
packets	O
,	O
so	O
it	O
can	O
analyze	O
packets	O
captured	O
on	O
a	O
remote	O
machine	O
at	O
the	O
time	O
that	O
they	O
are	O
captured	O
.	O
</s>
<s>
The	O
commercial	O
protocol	O
analysis	O
products	O
at	O
the	O
time	O
were	O
priced	O
around	O
$1500	O
and	O
did	O
not	O
run	O
on	O
the	O
company	O
's	O
primary	O
platforms	O
(	O
Solaris	B-Application
and	O
Linux	B-Application
)	O
,	O
so	O
Gerald	O
began	O
writing	O
Ethereal	B-Language
and	O
released	O
the	O
first	O
version	O
around	O
1998	O
.	O
</s>
<s>
The	O
Ethereal	B-Language
trademark	O
is	O
owned	O
by	O
Network	B-Architecture
Integration	O
Services	O
.	O
</s>
<s>
Combs	O
still	O
held	O
copyright	O
on	O
most	O
of	O
Ethereal	B-Language
's	O
source	O
code	O
(	O
and	O
the	O
rest	O
was	O
re-distributable	O
under	O
the	O
GNU	B-License
GPL	I-License
)	O
,	O
so	O
he	O
used	O
the	O
contents	O
of	O
the	O
Ethereal	B-Language
Subversion	B-Application
repository	O
as	O
the	O
basis	O
for	O
the	O
Wireshark	B-Language
repository	O
.	O
</s>
<s>
However	O
,	O
he	O
did	O
not	O
own	O
the	O
Ethereal	B-Language
trademark	O
,	O
so	O
he	O
changed	O
the	O
name	O
to	O
Wireshark	B-Language
.	O
</s>
<s>
In	O
2010	O
Riverbed	O
Technology	O
purchased	O
CACE	O
and	O
took	O
over	O
as	O
the	O
primary	O
sponsor	O
of	O
Wireshark	B-Language
.	O
</s>
<s>
Ethereal	B-Language
development	O
has	O
ceased	O
,	O
and	O
an	O
Ethereal	B-Language
security	O
advisory	O
recommended	O
switching	O
to	O
Wireshark	B-Language
.	O
</s>
<s>
In	O
2022	O
,	O
Sysdig	O
took	O
over	O
as	O
the	O
primary	O
sponsor	O
of	O
Wireshark	B-Language
and	O
in	O
2023	O
,	O
Sysdig	O
established	O
and	O
put	O
Wireshark	B-Language
into	O
the	O
Wireshark	B-Language
Foundation	O
.	O
</s>
<s>
Wireshark	B-Language
has	O
won	O
several	O
industry	O
awards	O
over	O
the	O
years	O
,	O
including	O
eWeek	O
,	O
InfoWorld	O
,	O
and	O
PC	O
Magazine	O
.	O
</s>
<s>
It	O
is	O
also	O
the	O
top-rated	O
packet	B-Protocol
sniffer	I-Protocol
in	O
the	O
Insecure.Org	O
network	B-Architecture
security	O
tools	O
survey	O
and	O
was	O
the	O
SourceForge	B-Application
Project	O
of	O
the	O
Month	O
in	O
August	O
2010	O
.	O
</s>
<s>
Combs	O
continues	O
to	O
maintain	O
the	O
overall	O
code	O
of	O
Wireshark	B-Language
and	O
issue	O
releases	O
of	O
new	O
versions	O
of	O
the	O
software	O
.	O
</s>
<s>
Wireshark	B-Language
is	O
a	O
data	O
capturing	O
program	O
that	O
"	O
understands	O
"	O
the	O
structure	O
(	O
encapsulation	B-Protocol
)	O
of	O
different	O
networking	O
protocols	O
.	O
</s>
<s>
Wireshark	B-Language
uses	O
pcap	B-Language
to	O
capture	O
packets	O
,	O
so	O
it	O
can	O
only	O
capture	O
packets	O
on	O
the	O
types	O
of	O
networks	O
that	O
pcap	B-Language
supports	O
.	O
</s>
<s>
Data	O
can	O
be	O
captured	O
"	O
from	O
the	O
wire	O
"	O
from	O
a	O
live	O
network	B-Architecture
connection	O
or	O
read	O
from	O
a	O
file	O
of	O
already-captured	O
packets	O
.	O
</s>
<s>
Live	O
data	O
can	O
be	O
read	O
from	O
different	O
types	O
of	O
networks	O
,	O
including	O
Ethernet	O
,	O
IEEE	O
802.11	O
,	O
PPP	B-Protocol
,	O
and	O
loopback	B-Protocol
.	O
</s>
<s>
Captured	O
network	B-Architecture
data	O
can	O
be	O
browsed	O
via	O
a	O
GUI	B-Application
,	O
or	O
via	O
the	O
terminal	O
(	O
command	B-Application
line	I-Application
)	O
version	O
of	O
the	O
utility	O
,	O
TShark	B-Language
.	O
</s>
<s>
Captured	O
files	O
can	O
be	O
programmatically	O
edited	O
or	O
converted	O
via	O
command-line	B-Application
switches	O
to	O
the	O
"	O
editcap	O
"	O
program	O
.	O
</s>
<s>
Plug-ins	B-Application
can	O
be	O
created	O
for	O
dissecting	O
new	O
protocols	O
.	O
</s>
<s>
VoIP	B-Application
calls	I-Application
in	O
the	O
captured	O
traffic	O
can	O
be	O
detected	O
.	O
</s>
<s>
Raw	O
USB	B-Protocol
traffic	O
can	O
be	O
captured	O
.	O
</s>
<s>
Wireshark	B-Language
's	O
native	O
network	B-Architecture
trace	O
file	O
formats	O
are	O
the	O
libpcap	B-Language
format	O
read	O
and	O
written	O
by	O
libpcap	B-Language
,	I-Language
WinPcap	I-Language
,	I-Language
and	I-Language
Npcap	I-Language
,	O
so	O
it	O
can	O
exchange	O
captured	O
network	B-Architecture
traces	O
with	O
other	O
applications	O
that	O
use	O
the	O
same	O
format	O
,	O
including	O
tcpdump	B-Protocol
and	O
CA	O
NetMaster	O
,	O
and	O
the	O
pcapng	O
format	O
read	O
by	O
newer	O
versions	O
of	O
libpcap	B-Language
.	O
</s>
<s>
It	O
can	O
also	O
read	O
captures	O
from	O
other	O
network	B-Architecture
analyzers	O
,	O
such	O
as	O
snoop	B-Protocol
,	O
Network	B-Protocol
General	I-Protocol
's	O
Sniffer	B-Protocol
,	O
and	O
Microsoft	B-Protocol
Network	I-Protocol
Monitor	I-Protocol
.	O
</s>
<s>
Capturing	O
raw	O
network	B-Architecture
traffic	O
from	O
an	O
interface	O
requires	O
elevated	O
privileges	O
on	O
some	O
platforms	O
.	O
</s>
<s>
For	O
this	O
reason	O
,	O
older	O
versions	O
of	O
Wireshark	B-Language
and	O
TShark	B-Language
often	O
ran	O
with	O
superuser	B-Application
privileges	O
.	O
</s>
<s>
Due	O
to	O
the	O
rather	O
large	O
number	O
of	O
vulnerabilities	O
in	O
the	O
past	O
(	O
of	O
which	O
many	O
have	O
allowed	O
remote	O
code	O
execution	O
)	O
and	O
developers	O
 '	O
doubts	O
for	O
better	O
future	O
development	O
,	O
OpenBSD	B-Operating_System
removed	O
Ethereal	B-Language
from	O
its	O
ports	O
tree	O
prior	O
to	O
OpenBSD	B-Operating_System
3.6	O
.	O
</s>
<s>
For	O
example	O
,	O
an	O
alternative	O
is	O
to	O
run	O
tcpdump	B-Protocol
or	O
the	O
dumpcap	O
utility	O
that	O
comes	O
with	O
Wireshark	B-Language
with	O
superuser	B-Application
privileges	O
to	O
capture	O
packets	O
into	O
a	O
file	O
,	O
and	O
later	O
analyze	O
the	O
packets	O
by	O
running	O
Wireshark	B-Language
with	O
restricted	O
privileges	O
.	O
</s>
<s>
To	O
emulate	O
near	O
realtime	O
analysis	O
,	O
each	O
captured	O
file	O
may	O
be	O
merged	O
by	O
mergecap	O
into	O
growing	O
file	O
processed	O
by	O
Wireshark	B-Language
.	O
</s>
<s>
On	O
wireless	O
networks	O
,	O
it	O
is	O
possible	O
to	O
use	O
the	O
Aircrack	B-Protocol
wireless	O
security	O
tools	O
to	O
capture	O
IEEE	O
802.11	O
frames	O
and	O
read	O
the	O
resulting	O
dump	O
files	O
with	O
Wireshark	B-Language
.	O
</s>
<s>
As	O
of	O
Wireshark	B-Language
0.99.7	O
,	O
Wireshark	B-Language
and	O
TShark	B-Language
run	O
dumpcap	O
to	O
perform	O
traffic	O
capture	O
.	O
</s>
<s>
Neither	O
Wireshark	B-Language
nor	O
TShark	B-Language
need	O
to	O
or	O
should	O
be	O
run	O
with	O
special	O
privileges	O
.	O
</s>
<s>
Wireshark	B-Language
can	O
color	O
packets	O
based	O
on	O
rules	O
that	O
match	O
particular	O
fields	O
in	O
packets	O
,	O
to	O
help	O
the	O
user	O
identify	O
the	O
types	O
of	O
traffic	O
at	O
a	O
glance	O
.	O
</s>
<s>
Wireshark	B-Language
can	O
also	O
be	O
used	O
to	O
capture	O
packets	O
from	O
most	O
network	B-Architecture
simulation	O
tools	O
such	O
as	O
ns	B-Language
and	O
OPNET	O
Modeler	O
.	O
</s>
