Netopia R310 Manual Do Utilizador

12-28 User’s Reference Guide

Example 2

Incoming packet has the source address of 200.1.1.184

This incoming IP packet (10000000) has a source IP address that does not match the network address in the
Source IP Address field (00000000) in the Netopia R310. This rule WILL for ward this packet because the
packet does not match.

Example 3

Incoming packet has the source address of 200.1.1.184

Since the Source IP Network Address in the Netopia R310 is 01100000, and the source IP address after the
logical AND is 1011000, this rule does NOT match and this packet will be passed.

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

200.1.1.184

10111000

(Source address in incoming IP packet)

AND

255.255.255.128

10000000

(Per form the logical AND)