Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
220
Tunnel
Configuration
Window
Item
Value setting
Description
Tunnel
Unchecked
by
default
Check
the
Enable
box
to
activate
the
IPSec
tunnel
Tunnel
Name
1.
A
Must
fill
setting
2.
String
format
can
be
any
text
Enter
a
tunnel
name.
Enter
a
name
that
is
easy
for
you
to
identify.
Interface
1.
A
Must
fill
setting
2.
WAN
1
is
selected
by
default
Select
WAN
interface
on
which
IPSec
tunnel
is
to
be
established.
Tunnel
Scenario
1.
A
Must
fill
setting
2.
Site
to
site
is
selected
by
default
Select
an
IPSec
tunneling
scenario
from
the
dropdown
box
for
your
application.
Select
Site
‐
to
‐
Site,
Site
‐
to
‐
Host,
Host
‐
to
‐
Site,
Host
‐
to
‐
Host,
or
Dynamic
VPN.
With
Site
‐
to
‐
Site
or
Site
‐
to
‐
Host
or
Host
‐
to
‐
Site,
IPSec
operates
in
tunnel
mode.
The
difference
among
them
is
the
number
of
subnets.
With
Host
‐
to
‐
Host,
IPSec
operates
in
transport
mode.
Hub
and
Spoke
1.
An
optional
setting
2.
None
is
set
by
default
Select
from
the
dropdown
box
to
setup
your
gateway
for
Hub
‐
and
‐
Spoke
IPsec
VPN
Deployments.
Select
None
if
your
deployments
will
not
support
Hub
or
Spoke
encryption.
Select
Hub
for
a
Hub
role
in
the
IPSec
design.
Select
Spoke
for
a
Spoke
role
in
the
IPSec
design.
Note:
Hub
and
Spoke
are
available
only
for
Site
‐
to
‐
Site
VPN
tunneling
specified
in
