<s>
Check	B-Operating_System
Point	I-Operating_System
IPSO	I-Operating_System
is	O
the	O
operating	B-General_Concept
system	I-General_Concept
for	O
the	O
'	O
Check	O
Point	O
firewall	O
 '	O
appliance	B-Architecture
and	O
other	O
security	O
devices	O
,	O
based	O
on	O
FreeBSD	B-Operating_System
,	O
with	O
numerous	O
hardening	O
features	O
applied	O
.	O
</s>
<s>
The	O
IP	O
in	O
IPSO	O
refers	O
to	O
Ipsilon	O
Networks	O
,	O
a	O
company	O
specialising	O
in	O
IP	B-Application
switching	I-Application
acquired	O
by	O
Nokia	O
in	O
1997	O
.	O
</s>
<s>
In	O
2009	O
,	O
Check	O
Point	O
acquired	O
the	O
Nokia	O
security	O
appliance	B-Architecture
business	O
,	O
including	O
IPSO	O
,	O
from	O
Nokia	O
.	O
</s>
<s>
IPSO	O
,	O
now	O
at	O
version	O
6.2	O
,	O
is	O
a	O
fork	O
of	O
FreeBSD	B-Operating_System
6	O
.	O
</s>
<s>
IPSO	O
SX	O
was	O
Nokia	O
's	O
first	O
release	O
of	O
a	O
Linux-based	O
IPSO	O
,	O
and	O
was	O
deployed	O
in	O
2002	O
on	O
the	O
now-defunct	O
Message	O
Protector	O
,	O
and	O
briefly	O
thereafter	O
on	O
a	O
short-lived	O
appliance	B-Architecture
version	O
of	O
the	O
"	O
Nokia	O
Access	O
Mobilizer	O
"	O
,	O
acquired	O
from	O
Eizel	O
.	O
</s>
<s>
It	O
had	O
a	O
partitioning	B-Application
scheme	I-Application
somewhat	O
reminiscent	O
of	O
IPSO	O
SB	O
,	O
a	O
LILO	B-Application
configuration	O
and	O
boot	B-Application
manager	I-Application
also	O
somewhat	O
inspired	O
by	O
IPSO	O
SB	O
,	O
and	O
a	O
software	O
package	O
installer	O
that	O
made	O
RPM	B-Application
packaging	O
look	O
more	O
familiar	O
to	O
a	O
Nokia	B-Operating_System
IPSO	I-Operating_System
administrator	O
.	O
</s>
<s>
IPSO	O
LX	O
is	O
a	O
nearly	O
vanilla	B-General_Concept
Gentoo-based	O
Linux	O
OS	O
,	O
and	O
is	O
used	O
on	O
Nokia	O
appliances	O
sold	O
with	O
Sourcefire	O
3D	O
.	O
</s>
<s>
Check	O
Point	O
offers	O
three	O
lines	O
of	O
security	O
appliances	O
–	O
one	O
based	O
on	O
IPSO	O
6.x	O
,	O
one	O
based	O
on	O
an	O
operating	B-General_Concept
system	I-General_Concept
called	O
SecurePlatform	O
and	O
the	O
latest	O
based	O
on	O
Gaia	O
platform	O
(	O
RHEL4	O
based	O
)	O
.	O
</s>
<s>
Effective	O
firewall	O
load-balancing	O
(	O
in	O
conjunction	O
with	O
Check	O
Point	O
synchronization	O
)	O
,	O
derived	O
from	O
Network	O
Alchemy	O
clustering	B-Architecture
technology	O
,	O
predating	O
and	O
still	O
independently	O
developed	O
from	O
Check	O
Points	O
ClusterXL	O
.	O
</s>
<s>
IPSO	O
SB	O
was	O
originally	O
derived	O
by	O
Ipsilon	O
Networks	O
from	O
FreeBSD	B-Operating_System
2.1-STABLE	O
and	O
cross-compiled	O
on	O
FreeBSD	B-Operating_System
2.2.6-RELEASE	O
and	O
3.5-RELEASE	O
platforms	O
.	O
</s>
<s>
Up	O
to	O
that	O
point	O
,	O
JavaScript	B-Language
and	O
frames	B-General_Concept
had	O
been	O
avoided	O
in	O
order	O
to	O
facilitate	O
the	O
use	O
of	O
Lynx	B-Application
as	O
a	O
command	O
line	O
interface	O
.	O
</s>
<s>
IPSO	O
5.0	O
build	O
056	O
was	O
released	O
in	O
2009	O
for	O
VSX	O
R65	O
support	O
on	O
IP	O
Appliance	B-Architecture
.	O
</s>
<s>
It	O
is	O
based	O
on	O
FreeBSD	B-Operating_System
6.x	O
.	O
</s>
<s>
Its	O
primary	O
advantage	O
over	O
IPSO	O
4.x	O
are	O
improved	O
memory	O
management	O
,	O
performance	O
,	O
scheduling	O
,	O
threading	O
,	O
POSIX-compliance	O
,	O
and	O
other	O
operating	B-General_Concept
system	I-General_Concept
features	O
.	O
</s>
<s>
IPSO	O
6.1	O
contains	O
other	O
enhancements	O
from	O
FreeBSD	B-Operating_System
6.x	O
but	O
without	O
CoreXL	O
support	O
.	O
</s>
<s>
When	O
Check	O
Point	O
acquired	O
Nokia	O
IP	O
appliance	B-Architecture
business	O
,	O
6.07	O
and	O
6.1	O
development	O
branches	O
were	O
merged	O
and	O
combined	O
to	O
6.2	O
.	O
</s>
<s>
After	O
acquiring	O
the	O
Nokia	O
IP	O
appliance	B-Architecture
business	O
,	O
Check	O
Point	O
announced	O
project	O
Gaia	O
to	O
combine	O
both	O
IPSO	O
and	O
Secure	O
Platform	O
.	O
</s>
