Example Filters - Netopia 4741 2A4NA Administration Manual

12-24 Administration Guide
Example network
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 4741. This will not forward this packet.
Incoming
Packet Filter
Netopia
200.1.1.0
255.255.255.128
Forward = No
Binary Representation
00011100
10000000
00000000
Internet
DATA
(Source IP Network Address)
(Source IP Mask)
(What happens on match)
(Source address in incoming IP packet)
(Perform the logical AND)
(Logical AND result)
IP: 200.1.1.??