M2M
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
289
5.5.d
OpenVPN
OpenVPN
is
an
application
that
implements
virtual
private
network
(VPN)
techniques
for
creating
secure
point
‐
to
‐
point
or
site
‐
to
‐
site
connections
in
routed
or
bridged
configurations
and
remote
access
facilities.
It
uses
a
custom
security
protocol
that
utilizes
SSL/TLS
for
key
exchange.
It
is
capable
of
traversing
network
address
translators
(NATs)
and
firewalls.
OpenVPN
allows
peers
to
authenticate
each
other
using
a
Static
key
or
certificates.When
used
in
a
multi
‐
client
‐
server
configuration,
it
allows
the
server
to
release
an
authentication
certificate
for
every
client,
using
signature
and
Certificate
authority.
It
uses
the
OpenSSL
encryption
library
extensively,
as
well
as
the
SSLv3/TLSv1
protocol,
and
contains
many
security
and
control
features.
Deploy
a
security
gateway
for
local
office
and
establish
a
virtual
private
network
with
the
remote
gateway
of
another
office
by
using
OpenVPN.
So,
all
client
hosts
behind
local
security
gateway
can
make
data
communication
with
others
behind
remote
gateway.
In
the
case
when
you
are
a
mobile
user
with
your
notebook
or
carrying
along
a
security
gateway
to
access
the
servers
and
database
in
company
headquarters
(HQ).
And
that
the
security
gateway
in
HQ
supports
the
OpenVPN
server
function.
You
can
dial
in
the
HQ
gateway
and
access
the
HQ
resources
by
establishing
an
OpenVPN
tunneling.
It
is
a
virtual
private
network
between
your
device
and
HQ
gateway
for
your
resource
accessing.
