Figure 8-1 Filter Rule Process; Filter Set - ZyXEL Communications Prestige 642 User Manual

Prestige 642 ADSL Internet Access Router
Fetch Next

Filter Set

Y e s
Next Filter Set
Available?
N o
D r o p P a c k e t
You can apply up to four filter sets to a particular port to block multiple types of packets. With each filter
set having up to six rules, you can have a maximum of 24 rules active for a single port.
8-2
Filter Set
Y e s
Next Filter Rule
N o
Available?
C h e c k N e x t R u l e
D r o p

Figure 8-1 Filter Rule Process

Start
Packet
into Filter
Fetch First
Filter Set
Fetch First
Filter Rule
Fetch Next
Filter Rule
Execute Filter
R u l e
Accept Packet
Filter Configuration
F o r w a r d