Working with filters and filter sets – Netopia D3232 IDSL User Manual
Page 77
Security 8-77
Since the Source IP Network Address in the Netopia D-Series’s filter rule is 01100000 (=96 decimal), and the
source IP address after the logical AND is 01100000, this rule does match and this packet will not be passed.
E
E
E
Exxxxaa
a
am
m
m
mp
p
p
pllllee
e
e 5
5
5
5
Incoming packet has the source address of 200.1.1.96.
Since the Source IP Network Address in the Netopia D-Series is 01100000, and the source IP address after the
logical AND is 01100000, this rule does match and this packet will NOT be passed. This rule masks off a
single IP address.
W
W
W
Wo
o
o
orrrrkk
k
kiiiin
n
n
ng
g
g
g w
w
w
wiiiitttth
h
h
h FFFFiiiillllttttee
e
errrrssss aa
a
an
n
n
nd
d
d
d ffffiiiillllttttee
e
errrr ssssee
e
ettttssss
This section covers Filters and filter sets.
To work with filters and filter sets, begin by accessing the filter set screens.
Note: Make sure you understand how filters work before attempting to use them. Read the section
filters and filter sets,” beginning on page 8-64
.
255.255.255.240
11110000
(Per form the logical AND)
01100000
(Logical AND result)
Filter Rule:
200.1.1.96
(Source IP Network Address)
255.255.255.255
(Source IP Mask)
For ward = No
(What happens on match)
IP Address
Binar y Representation
200.1.1.96
01100000
(Source address in incoming IP packet)
AND
255.255.255.255
11111111
(Per form the logical AND)
01100000
(Logical AND result)
Main
Menu
System
Configuration
Filter
Sets