PoE
AP
Router
110
2.5.3
DMZ
&
Pass
Through
DMZ
(De
Militarized
Zone)
Host
is
a
host
that
is
exposed
to
the
Internet
cyberspace
but
still
within
the
protection
of
firewall
by
gateway
device.
So,
the
function
allows
a
computer
to
execute
2
‐
way
communication
for
Internet
games,
Video
conferencing,
Internet
telephony
and
other
special
applications.
In
some
cases
when
a
specific
application
is
blocked
by
NAT
mechanism,
you
can
indicate
that
LAN
computer
as
a
DMZ
host
to
solve
this
problem.
The
DMZ
function
allows
you
to
ask
the
gateway
pass
through
all
normal
packets
to
the
DMZ
host
behind
the
NAT
gateway
only
when
these
packets
are
not
expected
to
receive
by
applications
in
the
gateway
or
by
other
client
hosts
in
the
Intranet.
Certainly,
the
DMZ
host
is
also
protected
by
the
gateway
firewall.
Activate
the
feature
and
specify
the
DMZ
host
with
a
host
in
the
Intranet
when
needed.
DMZ
Scenario
When
the
network
administrator
wants
to
set
up
some
service
daemons
in
a
host
behind
NAT
gateway
to
allow
remote
users
request
for
services
from
server
actively,
you
just
have
to
configure
this
host
as
DMZ
Host.
As
shown
in
the
diagram,
there
is
an
X
server
installed
as
DMZ
host,
whose
IP
address
is
10.0.75.100.
Then,
remote
user
can
request
services
from
X
server
just
as
it
is
provided
by
the
gateway
whose
global
IP
address
is
118.18.81.33.
The
gateway
will
forward
those
packets,
not
belonging
to
any
configured
virtual
server
or
applications,
directly
to
the
DMZ
host.
