<s>
An	O
XML	B-Protocol
firewall	I-Protocol
is	O
a	O
specialized	O
device	O
used	O
to	O
protect	O
applications	O
exposed	O
through	O
XML	O
based	O
interfaces	O
like	O
WSDL	O
and	O
REST	B-Protocol
and	O
scan	O
XML	O
traffic	O
coming	O
into	O
and	O
going	O
out	O
from	O
an	O
organization	O
.	O
</s>
<s>
Typically	O
deployed	O
in	O
a	O
DMZ	B-General_Concept
environment	O
an	O
XML	B-Protocol
Firewall	I-Protocol
is	O
often	O
used	O
to	O
validate	O
XML	O
traffic	O
,	O
control	O
access	O
to	O
XML	O
based	O
resources	O
,	O
filter	O
XML	O
content	O
and	O
rate	O
limit	O
requests	O
to	O
back-end	O
applications	O
exposed	O
through	O
XML	O
based	O
interfaces	O
.	O
</s>
<s>
XML	B-Protocol
Firewalls	I-Protocol
are	O
commonly	O
deployed	O
as	O
hardware	O
but	O
can	O
also	O
be	O
found	O
as	O
software	O
and	O
virtual	O
appliance	O
for	O
VMWare	O
,	O
Xen	O
or	O
Amazon	O
EC2	O
.	O
</s>
<s>
A	O
number	O
of	O
brands	O
of	O
XML	B-Protocol
Firewall	I-Protocol
exist	O
and	O
they	O
often	O
differ	O
based	O
on	O
parameters	O
like	O
performance	O
(	O
with	O
or	O
without	O
hardware	O
acceleration	O
,	O
32	O
Vs	O
64	O
bit	O
)	O
,	O
scalability	O
(	O
how	O
do	O
they	O
cluster	O
and	O
perform	O
under	O
load	O
)	O
,	O
security	O
certification	O
(	O
common	O
criteria	O
,	O
FIPS	O
being	O
the	O
most	O
common	O
)	O
,	O
identity	O
support	O
(	O
for	O
SAML	O
,	O
OAuth	O
,	O
enterprise	O
SSO	O
solutions	O
)	O
and	O
extensibility	O
(	O
they	O
can	O
support	O
different	O
transport	O
protocols	O
like	O
IBM	B-Application
MQ	I-Application
,	O
Tibco	O
EMS	O
,	O
etc	O
.	O
)	O
.	O
</s>
<s>
XML	O
Firewalling	O
functionality	O
is	O
typically	O
embedded	O
inside	O
XML	B-Device
Appliances	I-Device
and	O
SOA	O
Gateways	O
.	O
</s>
