Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
120
Scenario
Application
Timing
When
the
administrator
of
the
gateway
wants
to
set
up
some
service
daemons
in
a
host
that
is
in
the
Intranet
to
allow
remote
users
request
for
services
from
the
host
actively,
even
the
host
is
behind
a
NAT
gateway.
But
remote
users
think
the
gateway
provides
those
services,
so
users
use
the
global
IP
of
the
gateway
to
request
their
services.
Apply
the
DMZ
feature
in
the
NAT
gateway
to
meet
the
application
scenario.
In
addition,
please
also
be
noted
that
the
client
host
is
still
protected
by
the
gateway
firewall.
Scenario
Description
The
DMZ
host
is
behind
a
NAT
gateway
and
receives
all
normal
and
active
packets
from
the
Internet.
Remote
user
can
access
the
DMZ
host
by
using
the
IP
address
of
the
gateway,
and
the
gateway
will
skip
the
NAT
checking
on
the
DMZ
host.
DMZ
host
is
still
protected
by
the
gateway
firewall.
Parameter
Setup
Example
Following
table
lists
the
parameter
configuration
as
an
example
for
the
gateway
in
above
diagram
with
DMZ
enabling.
Use
default
value
for
those
parameters
that
are
not
mentioned
in
the
table.
Configuration Path
[DMZ]-[Configuration]
DMZ
IP Address of DMZ Host:
10.0.75.100
■
Enable
Scenario
Operation
Procedure
In
above
diagram,
the
NAT
Gateway
is
the
gateway
of
Network
‐
A
and
the
subnet
of
its
Intranet
is
10.0.75.0/24.
The
gateway
has
the
IP
address
of
10.0.75.2
for
LAN
interface
and
118.18.81.33
for
WAN
interface.
It
serves
as
a
NAT
router.
Configure
a
host
in
the
Intranet
to
be
the
DMZ
Host
and
activate
the
rule,
whose
IP
address
is
