<s>
Conserver	B-Protocol
is	O
a	O
serial	B-Device
console	I-Device
management	O
system	O
that	O
provides	O
remote	O
access	O
to	O
system	B-Device
consoles	I-Device
and	O
logs	O
to	O
a	O
central	O
(	O
master	O
)	O
host	O
.	O
</s>
<s>
"	O
Console	B-Device
server	I-Device
"	O
as	O
it	O
was	O
originally	O
known	O
,	O
was	O
written	O
by	O
Tom	O
Fine	O
,	O
and	O
was	O
presented	O
with	O
source	O
code	O
to	O
the	O
world	O
at	O
large	O
during	O
LISA	O
IV	O
,	O
in	O
Colorado	O
Springs	O
in	O
1990	O
.	O
</s>
<s>
Bryan	O
Stansell	O
later	O
merged	O
the	O
forks	B-Application
with	O
most	O
features	O
and	O
added	O
TCP	B-Protocol
Wrapper	I-Protocol
access	O
control	O
,	O
SSL	B-Protocol
encryption	I-Protocol
,	O
UDS	B-Protocol
networking	O
and	O
PAM	B-Application
authentication	O
support	O
;	O
as	O
well	O
as	O
accepting	O
patches	O
submitted	O
by	O
others	O
.	O
</s>
<s>
The	O
conserver	B-Protocol
was	O
written	O
to	O
be	O
used	O
with	O
RS-232	O
serial	O
wired	O
multi-port	O
cards	O
.	O
</s>
<s>
Modern	O
day	O
setups	O
(	O
generally	O
)	O
use	O
separate	O
management	O
Ethernet	O
networks	O
and	O
console	B-Device
servers	I-Device
.	O
</s>
<s>
In	O
some	O
cases	O
some	O
form	O
of	O
reverse	B-Protocol
telnet	I-Protocol
or	O
SSH	B-Protocol
connection	O
is	O
used	O
;	O
alternatively	O
,	O
an	O
additional	O
level	O
of	O
indirection	O
can	O
be	O
interposed	O
:	O
the	O
server	O
provides	O
a	O
Serial	B-General_Concept
over	I-General_Concept
LAN	I-General_Concept
service	O
via	O
IPMI	O
,	O
and	O
a	O
command-line	O
utility	O
connects	O
to	O
the	O
server	O
.	O
</s>
<s>
This	O
socket	O
can	O
then	O
be	O
used	O
as	O
a	O
"	O
virtual	O
reverse	B-Protocol
telnet	I-Protocol
"	O
connection	O
.	O
</s>
<s>
conserver	B-Protocol
is	O
not	O
limited	O
to	O
any	O
one	O
form	O
of	O
network	O
protocol	O
,	O
and	O
can	O
handle	O
these	O
setups	O
,	O
as	O
well	O
as	O
log	O
the	O
console	O
output	O
of	O
virtual	B-Architecture
machines	I-Architecture
.	O
</s>
<s>
Conserver	B-Protocol
is	O
generally	O
used	O
in	O
computer	B-Architecture
cluster	I-Architecture
setups	O
too	O
,	O
logging	O
messages	O
either	O
via	O
a	O
terminal	B-Device
server	I-Device
or	O
with	O
an	O
instance	O
running	O
on	O
every	O
node	O
monitoring	O
the	O
console	O
of	O
the	O
next	O
machine	O
,	O
known	O
as	O
daisy-chaining	B-Application
.	O
</s>
