Netopia 4000-Series manual Example

10-42 Firmware User Guide

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 Firmware Version 5.4. 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)

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 Firmware Version 5.4. This rule will forward this packet because the packet does not match.

Example 3

		Filter Rule:		200.1.1.96		(Source IP Network Address)
				255.255.255.240		(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