Netopia R910 - Manual (Page 147)

Security 13-147
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 Binar y Representation
200.1.1.28 00011100 (Source address in incoming IP packet)
AND
255.255.255.128 10000000 (Per form the logical AND)
00000000 (Logical AND result)
Netopia
Internet
IP: 200.1.1.??
DATA
Incoming
Packet Filter