Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
171
Scenario
Application
Timing
When
the
administrator
of
the
gateway
wants
to
reject
some
client
hosts
with
specific
MAC
addresses
in
the
Intranet
to
connect
to
the
gateway,
he
can
use
the
"MAC
Control"
function
to
carry
out
to
reject
by
defining
the
black
list
as
shown
in
above
diagram.
Certainly,
when
the
administrator
wants
to
allow
only
the
client
hosts
with
dedicated
MAC
addresses
to
connect
to
the
gateway,
he
can
use
the
"MAC
Control"
function
by
defining
the
white
list
to
carry
out
to
meet
the
requirement.
It
is
contrasting
to
above
diagram.
Scenario
Description
To
only
reject
client
hosts
with
dedicated
MAC
addresses
in
the
black
list
to
connect
to
the
gateway
and
block
other
hosts
that
are
not
defined
in
the
“MAC
Control
Rule
List”
entry.
Parameter
Setup
Example
Following
tables
list
the
parameter
configuration
as
an
example
for
the
gateway
in
above
diagram
with
"MAC
Control"
enabling.
Use
default
value
for
those
parameters
that
are
not
mentioned
in
the
tables.
Configuration
Path
[MAC
Control]
‐
[Configuration]
MAC
Control
■
Enable
Black
List
/
White
List
Allow
all
to
pass
except
those
match
the
following
rules.
Log
Alert
■
Enable
Configuration
Path
[MAC
Control]
‐
[MAC
Control
Rule
List]
ID
1
Rule
Name
Block
JP
NB
MAC
Address
20:6A:6A:6A:6A:6B
Rule
■
Enable
Scenario
Operation
Procedure
In
above
diagram,
the
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,
118.18.81.33
for
WAN
‐
1
interface.
It
serves
as
a
NAT
router.
Enable
the
MAC
control
function
and
specify
the
"MAC
Control
Rule
List"
is
a
black
list,
and
configure
one
MAC
control
rule
for
the
gateway
to
deny
the
connection
request
from
the
"JP
NB"
with
its
own
MAC
address.
System
will
block
the
connecting
from
the
"JP
NB"
to
the
gateway
but
allow
others.
