Netopia R5000 Manual de usuario descargar pdf (Pagina 215)

Security 13-37

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 R5000 Series Router. This rule will forward this packet

because the packet does not match.

Incoming packet has the source address of 200.1.1.184.

Since the Source IP Network Address in the Netopia R5000 Series Router is 01100000, and the source IP

address after the logical AND is 1011000, this rule does not match and this packet will be forwarded.

Incoming packet has the source address of 200.1.1.104.

Filter Rule: 200.1.1.96 (Source IP Network Address)

255.255.255.240 (Source IP Mask)

Forward = No (What happens on match)

IP Address Binary Representation

200.1.1.184 10111000 (Source address in incoming IP packet)

AND

255.255.255.240 11110000 (Perform the logical AND)

10110000 (Logical AND result)

Filter Rule: 200.1.1.96 (Source IP Network Address)

255.255.255.240 (Source IP Mask)

Forward = No (What happens on match)

IP Address Binary Representation

200.1.1.104 01101000 (Source address in incoming IP packet)

AND

255.255.255.240 11110000 (Perform the logical AND)

01100000 (Logical AND result)

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Netopia R5000 Manual de usuario Pagina 215