Netopia 4541 User Manual
Page 171
Security 11-27
Example 4
Incoming packet has the source address of 200.1.1.104.
Since the Source IP Network Address in the Netopia 4541/4542 is 01100000, and the source IP address after
the logical AND is 01100000, this rule does match and this packet will not be for warded.
Example 5
Incoming packet has the source address of 200.1.1.96.
Since the Source IP Network Address in the Netopia 4541/4542 is 01100000, and the source IP address after
the logical AND is 01100000, this rule does match and this packet will not be for warded. This rule masks off a
single IP address.
Filter Rule:
200.1.1.96
(Source IP Network Address)
255.255.255.240
(Source IP Mask)
For ward = No
(What happens on match)
IP Address
Binar y Representation
200.1.1.104
01101000
(Source address in incoming IP packet)
AND
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)