Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
110
setting
under
System
)
Then
check
Enable
box
to
enable
this
rule.
When
“
UDP
”
is
selected
It
means
the
option
“Protocol”
of
packet
filter
rule
is
UDP.
Public
Port
selected
a
predefined
port
from
Well
‐
known
Service
,
and
Private
Port
is
the
same
with
Public
Port
number.
Public
Port
is
selected
Single
Por
t
and
specify
a
port
number,
and
Private
Port
can
be
set
a
Single
Port
number.
Public
Port
is
selected
Port
Range
and
specify
a
port
range,
and
Private
Port
can
be
selected
Single
Port
or
Port
Range
.
Apply
Time
Schedule
to
this
rule,
otherwise
leave
it
as
Always
.
(
refer
to
Scheduling
setting
under
System
)
Then
check
Enable
box
to
enable
this
rule.
When
“
TCP
&
UDP
”
is
selected
It
means
the
option
“Protocol”
of
packet
filter
rule
is
TCP
and
UDP.
Public
Port
selected
a
predefined
port
from
Well
‐
known
Service
,
and
Private
Port
i
s
the
same
with
Public
Port
number.
Public
Port
is
selected
Single
Port
and
specify
a
port
number,
and
Private
Port
can
be
set
a
Single
Port
number.
Public
Port
is
selected
Port
Range
and
specify
a
port
range,
and
Private
Port
can
be
selected
Single
Port
or
Port
Range
.
Apply
Time
Schedule
to
this
rule,
otherwise
leave
it
as
Always
.
(
refer
to
Scheduling
setting
under
System
)
Then
check
Enable
box
to
enable
this
rule.
When
“
GRE
”
is
selected
It
means
the
option
“Protocol”
of
packet
filter
rule
is
GRE.
Apply
Time
Schedule
to
this
rule,
otherwise
leave
it
as
Always
.
(
refer
to
Scheduling
setting
under
System
)
Then
check
Enable
box
to
enable
this
rule.
When
“
ESP
”
is
selected
It
means
the
option
“Protocol”
of
packet
filter
rule
is
ESP.
Apply
Time
Schedule
to
this
rule,
otherwise
leave
it
as
Always
.
(
refer
to
Scheduling
setting
under
System
)
Then
check
Enable
box
to
enable
this
rule.
Click
the
Save
button
to
save
the
settings.
When
“
SCTP
”
is
selected
It
means
the
option
“Protocol”
of
packet
filter
rule
is
SCTP.
Apply
Time
Schedule
to
this
rule,
otherwise
leave
it
as
Always
.
(
refer
to
Scheduling
setting
under
System
)
Then
check
Enable
box
to
enable
this
rule.
When
“
User
‐
defined
”
is
selected
It
means
the
option
“Protocol”
of
packet
filter
rule
is
User
‐
defined.
For
Protocol
Number
,
enter
a
port
number.
Apply
Time
Schedule
to
this
rule,
otherwise
leave
it
as
Always
.
(
refer
to
Scheduling
setting
under
System
)