Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
215
"Full
Tunnel"
‐
enabled
Site
to
Site
Tunnel
Scenario
In
"Site
to
Site"
tunnel
scenario,
the
client
hosts
of
remote
site
can
securely
access
the
enterprise
resources
in
the
Intranet
of
headquarters
gateway
via
an
established
VPN
tunnel,
as
described
above.
But
the
regular
Internet
accessing
at
remote
site
still
go
through
the
WAN
interface
of
remote
gateway,
not
the
VPN
tunnel.
If
you
want
all
packets
to
be
transferred
from
the
Network
‐
B
at
branch
office
via
this
VPN
tunnel,
including
the
enterprise
resource
accessing
and
the
Internet
accessing,
you
can
refer
to
following
scenario
example.
When
Full
Tunnel
function
of
remote
Business
Security
Gateway
is
enabled,
all
data
traffic
from
remote
clients
behind
remote
Business
Security
Gateway
will
go
over
the
VPN
tunnel.
That
is,
if
a
user
is
operating
at
a
PC
that
is
in
the
Intranet
of
remote
Business
Security
Gateway,
all
application
packets
and
private
data
packets
from
the
PC
will
be
transmitted
securely
in
the
VPN
tunnel
to
access
the
resources
behind
HQ
Business
Security
Gateway,
including
surfing
the
Internet.
As
a
result,
every
time
the
user
surfs
the
web
for
shopping
or
searching
data
on
Internet,
checking
personal
emails,
or
accessing
HQ
servers,
all
are
done
on
a
secured
connection
through
HQ
Business
Security
Gateway.
Following
diagram
illustrates
this
application
scenario.
It
is
the
same
as
the
one
for
the
"Site
to
Site"
scenario
with
"Full
Tunnel"
disabled.
But
the
"Full
Tunnel"
parameter
in
this
scenario
is
enabled
now.
When
the
"Site
to
Site"
IPSec
VPN
tunnel
has
been
established
by
either
peer,
all
client
hosts
in
Network
‐
B
at
branch
office
can
access
the
resources
in
HQ
and
the
Internet
by
using
the
tunnel
in
a
secure
link
since
the
"Full
Tunnel"
function
is
activated
in
Network
‐
B
site.
