7
IPsec VPN
114
There
are
two
common
scenarios
where
VPN
is
used:
1.
LAN
to
LAN
connection
–
Where
two
internal
networks
need
to
be
connected
together
over
the
Internet.
In
this
case,
each
network
is
protected
by
an
individual
security
gateway
and
the
VPN
tunnel
is
set
up
between
them.
2.
Client
to
LAN
connection
–
Where
many
remote
clients
need
to
connect
to
an
internal
network
over
the
Internet.
In
this
case,
the
internal
network
is
protected
by
the
SEG
to
which
the
client
connects
and
the
VPN
tunnel
is
set
up
between
them.