Example Filters - Netopia R6100 Reference Manual

16-40 User's Reference Guide
Example filters
Example 1
Filter Rule:
Incoming packet has the source address of 200.1.1.28
IP Address
200.1.1.28
AND
255.255.255.128
This incoming IP packet has a source IP address that matches the network address in the Source IP Address
field (00000000) in the Netopia R6000 Series. This will not forward this packet.
Example 2
Filter Rule:
Incoming packet has the source address of 200.1.1.184.
IP Address
200.1.1.184
AND
255.255.255.128
200.1.1.0
255.255.255.128
Forward = No
Binary Representation
00011100
10000000
00000000
200.1.1.0
255.255.255.128
Forward = No
Binary Representation
10111000
10000000
10000000
(Source IP Network Address)
(Source IP Mask)
(What happens on match)
(Source address in incoming IP packet)
(Perform the logical AND)
(Logical AND result)
(Source IP Network Address)
(Source IP Mask)
(What happens on match)
(Source address in incoming IP packet)
(Perform the logical AND)
(Logical AND result)