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Execute filter rule, Filter set – ZyXEL Communications Prestige 642R Series User Manual

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Prestige 642R Series ADSL Router

Filter Configuration

8-3

Start

Fetch First

Filter Set

Fetch First

Filter Rule

Active?

Execute

Filter Rule

Fetch Next

Filter Rule

Next filter

Rule

Available?

Fetch Next

Filter Set

Next Filter Set

Available?

Accept Packet

Drop Packet

Yes

No

Yes

No

Yes

Packet into

filter

Filter Set

Forward

Drop

No

Check

Next
Rule

Figure 8-2

Filter Rule Process

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.