Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
160
Scenario
Application
Timing
When
the
administrator
of
the
gateway
wants
to
block
the
Web
requests
with
some
dedicated
patterns,
he
can
use
the
"URL
Blocking"
function
to
carry
out
to
block
specific
Web
requests
by
defining
the
black
list
as
shown
in
above
diagram.
Certainly,
when
the
administrator
wants
to
allow
only
the
Web
requests
with
some
dedicated
patterns
to
go
through
the
gateway,
he
can
use
the
"URL
Blocking"
function
by
defining
the
white
list
to
carry
out
to
meet
the
requirement.
It
is
contrasting
to
above
diagram.
Scenario
Description
Web
requests
with
dedicated
patterns
in
the
black
list
will
be
blocked
by
the
gateway.
Other
ones
can
pass
through
the
gateway.
Parameter
Setup
Example
Following
tables
list
the
parameter
configuration
as
an
example
for
the
gateway
in
above
diagram
with
"URL
Blocking"
enabling.
Use
default
value
for
those
parameters
that
are
not
mentioned
in
the
tables.
Configuration
Path
[URL
Blocking]
‐
[Configuration]
URL
Blocking
■
Enable
Black
List
/
White
List
Allow
all
to
pass
except
those
match
the
following
rules.
Invalid
Access
Web
Redirection
■
Enable
Configuration
Path
[URL
Blocking]
‐
[URL
Blocking
Rule
List]
ID
1
2
Rule
Name
Block
sex
&
sexygirl
Block
playboy
URL/Domain
Name/Keyword
sex
;sexygirl
playboy
Rule
■
Enable
■
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
URL
blocking
function
and
specify
the
"URL
Blocking
Rule
List"
is
a
black
list
and
configure
two
URL
blocking
rules
for
the
gateway.
Create
one
rule
to
deny
the
Web
requests
with
"sex"
or
"sexygirl"
patterns
and
the
other
to
deny
the
Web
requests
with
"playboy"
pattern
to
go
through
the
gateway.
System
will
block
the
Web
requests
with
"sex",
"sexygirl"
or
"playboy"
patterns
to
pass
through
the
gateway.
