Robustel
GoFixed
W800
User
Guide
RT_W800_UG_v02.00
04.11.2011
Page
42
/59
Confidential
of
the
GATEWAY
to
use
the
built
‐
in
DNS
server
(recommended).
Get
DNS
Server
from
WAN
‐
select
to
pass
the
DNS
server
addresses
obtained
automatically
from
the
WAN
interface
to
the
DHCP
clients.
Configure
the
second
IP
address
‐
select
to
assign
an
additional
IP
address
to
the
gateway
(advanced
option).
Note:
1.
When
using
the
DHCP
Servers,
please
make
sure
you
don’t
have
multiple
DHCP
Servers
in
one
LAN.
2.
To
view
a
list
of
clients
that
have
been
assigned
addresses
by
the
DHCP
server
go
to
the
path
DHCP
‐
>
Assigned
Leases
3.
To
reserve
an
IP
address
within
the
DHCP
range
for
a
client
so
that
the
client
always
receives
the
same
IP
address
go
to
the
path
DHCP
‐
>
Static
Leases.
Click
the
Add
Static
Lease
button
and
enter
the
MAC
address
and
required
IP
Address
for
the
client.
Make
sure
that
the
IP
address
chosen
is
within
the
range
entered
on
the
LAN
Setup
page.
3.10
Firewall
3.10.1
Firewall
Settings
Please
go
to
path:
Firewall
‐
>
Firewall
Settings
page,
check
Enable
to
activate
Global
firewall
settings
,
then
click
Apply/SAVE
.
Note
:
three
Firewall
levels
are
supported
in
the
Gateway,
they
are:
Low
:
enable
basic
firewall
feature
‐
prevent
port
from
scanning;
allow
PING
from
WAN
side;
allow
ICMP
redirect
messages
from
WAN
side.
Middle
:
based
on
low
level,
prevent
ICMP
redirect
messages.
High
:
based
on
middle
level,
prevent
SYN
Flood
attack;
against
PING
from
WAN
side.
Note:
by
default
the
Firewall
is
enabled
and
set
to
the
“High”
setting
–
it
is
recommended
that
to
maintain
maximum
security
this
setting
is
not
changed.
3.10.2
IP
Filters
When
the
firewall
is
enabled
on
a
WAN
or
LAN
interface,
all
incoming
IP
traffic
is
BLOCKED.
However,
some
IP
traffic
