Chapter 3: Connections and setup
22
Illustrations
contained
in
this
document
are
for
representation
only.
IPsec
PassThrough
enables
IPsec
type
packets
to
pass
between
WAN
and
LAN.
IPsec
(IP
Security)
is
a
security
mechanism
used
in
Virtual
Private
Networks
(VPNs).
PPTP
PassThrough
enables
PPTP
type
packets
to
pass
between
WAN
and
LAN.
PPTP
(Point
to
Point
Tunneling
Protocol)
is
another
mechanism
sometimes
used
in
VPNs.
Remote
Config
Management
makes
the
configuration
web
pages
in
your
gateway
accessible
from
the
WAN
side.
Note
that
page
access
is
limited
to
only
those
who
know
the
gateway
access
password.
When
accessing
your
gateway
from
a
remote
location,
your
must
use
HTTP
port
8080
and
the
WAN
IP
address
of
the
gateway.
e.g.,
if
the
WAN
IP
address
is
157.254.5.7,
you
would
navigate
to
http://157.254.5.7:8080
to
reach
your
gateway.
Multicast
Enable
enables
multicast
traffic
to
pass
through
WAN
and
LAN.
You
may
need
to
enable
this
to
see
some
types
of
broadcast
streaming
and
content
on
the
Internet.
UPnP
Universal
Plug
and
Play
(UPnP)
helps
devices,
such
as
Internet
appliances
and
computers,
access
the
network
and
connect
to
other
devices
as
needed.
UPnP
devices
can
automatically
discover
the
services
from
other
registered
UPnP
devices
on
the
network.
NAT
ALG
enable
NAT
ALG
(application
layer
gateways)
allows
customized
NAT
traversal
filters
to
be
plugged
into
the
gateway
to
support
address
and
port
translation
for
certain
application
layer
"control/data"
protocols
such
as
RSVP,
FTP,
TFTP,
Kerb88,
NetBios
,
IKE,
RTSP,
Kerb1293
,
H225
,
PPTP
,
MSN
,
SIP
,
ICQ
,
IRC666x
,
ICQTalk
,
Net2Phone
,
IRC7000
,
IRC8000
file
transfer
in
IM
applications
etc.
In
order
for
these
protocols
to
work
through
NAT
or
a
firewall,
either
the
application
has
to
know
about
an
address/port
number
combination
that
allows
incoming
packets,
or
the
NAT
has
to
monitor
the
control
traffic
and
open
up
port
mappings
(firewall
pinhole)
dynamically
as
required.
Legitimate
application
data
can
thus
be
passed
through
the
security
checks
of
the
firewall
or
NAT
that
would
have
otherwise
restricted
the
traffic
for
not
meeting
its
limited
filter
criteria.
Summary of Contents for TCG220
Page 1: ...TCG220 USER MANUAL ...
