Example network, Example filters, Example 1 – Netopia R2020 User Manual

Page 237: Example filters -33

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Security 14-33

Example Network

Example Filters

Example 1

Incoming packet has the source address of 200.1.1.28

This incoming IP packet has a source IP address that matches the network address in the Source IP Address
field (00000000) in the Netopia R2020. This will NOT for ward this packet.

Filter Rule:

200.1.1.0

(Source IP Network Address)

255.255.255.128

(Source IP Mask)

For ward = No

(What happens on match)

IP Address

Binar y Representation

200.1.1.28

00011100

(Source address in incoming IP packet)

AND

255.255.255.128

10000000

(Per form the logical AND)

00000000

(Logical AND result)

Netopia

Internet

IP: 200.1.1.??

DATA

Incoming
Packet Filter