Chapter 6: Using Router Setup
103
You use the settings on the
Add Firewall Policy Rule
page to
configure your firewall security. In setting your criteria or rules,
it is important to know whether you want to block traffic or
allow traffic into your network. This is controlled by the
Traffic Inbound
and
Traffic Outbound
settings where you
choose
Allow
or
Block
. After you determine what you want to
do, you then fill in the other settings to specify what it is that
you want to block or allow.
Suppose you enter
Allow
in the
Traffic
Inbound
and
Outbound
settings and
Any
in the
Src Address
setting. This
sets the firewall to allow any traffic into your network.
Conversely, suppose you choose
Block
for
Traffic Inbound
,
choose
Assign
for
Src Address
and specify
a range of IP
addresses
. This sets the firewall to block all traffic that has the
IP addresses you specified.
The following table shows you the criteria that you can enter:
Setting
Description
Source
Address
Lets you specify
Any
for all IP
addresses or a specific range of IP
addresses from a particular source
to be blocked or allowed.
Destination
Address
Lets you specify
Any
for all IP
addresses or a specific range of IP
addresses of a destination to be
blocked or allowed.
IP Protocol
Lets you specify a protocol to be
blocked or allowed.
eq
is equals
and
neq
is not equal. For
example,
eq TCP
will allow only
TCP.
neq TCP
will allow
everything including TCP.
Source Port
Lets you block or allow traffic
from a particular port.
Destination
Port
Lets you block or allow traffic
going to a destination port.
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