13-36 User’s Reference Guide

Example filters

Example 1

 

 

Filter Rule:

 

200.1.1.0

 

(Source IP Network Address)

 

 

 

 

 

 

 

 

 

 

 

 

 

255.255.255.128

 

(Source IP Mask)

 

 

 

 

 

 

 

 

 

 

 

 

 

Forward = No

 

(What happens on match)

 

 

 

 

 

 

 

 

 

Incoming packet has the source address of 200.1.1.28

 

 

 

 

 

 

 

 

 

 

IP Address

Binary Representation

 

 

 

 

 

 

 

 

200.1.1.28

00011100

(Source address in incoming IP packet)

 

 

 

 

 

 

 

 

AND

 

 

 

 

 

 

 

 

 

 

255.255.255.128

10000000

(Perform the logical AND)

 

 

 

 

 

 

 

 

00000000

(Logical AND result)

 

 

 

 

 

 

 

 

This incoming IP packet has a source IP address that matches the network address in the Source IP Address field (00000000) in the Netopia R5000 Series Router. This will not forward this packet.

Example 2

 

 

Filter Rule:

 

200.1.1.0

 

(Source IP Network Address)

 

 

 

 

 

 

 

 

 

 

 

 

 

255.255.255.128

 

(Source IP Mask)

 

 

 

 

 

 

 

 

 

 

 

 

 

Forward = No

 

(What happens on match)

 

 

 

 

 

 

 

 

 

Incoming packet has the source address of 200.1.1.184.

 

 

 

 

 

 

 

 

 

 

IP Address

Binary Representation

 

 

 

 

 

 

 

 

200.1.1.184

10111000

(Source address in incoming IP packet)

 

 

 

 

 

 

 

 

AND

 

 

 

 

 

 

 

 

 

 

255.255.255.128

10000000

(Perform the logical AND)

 

 

 

 

 

 

 

 

10000000

(Logical AND result)

 

 

 

 

 

 

 

 

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Netopia R5200, R5300, R5100 manual Example filters