Netopia 3300-ENT Series, Firmware User Manual

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Security 10-43
Example network
Example filters
Example 1
Incoming packet has the source address of 200.1.1.28
Less Than or Equal Any por t less than or equal to the por t defined
Equal Matches only the por t defined
Greater Than or Equal Matches the por t or any por t greater
Greater Than Matches anything greater than the por t defined
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 Binary Representation
200.1.1.28 00011100 (Source address in incoming IP packet)
AND
255.255.255.128 10000000 (Per form the logical AND)
Data
Internet
IP 200.1.1.??
Input Packet
Filter