Figure 7-2 Filter Rule Process - ZyXEL Communications ZyXEL ZYWALL10 User Manual

Internet security gateway
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Fetch Next
Filter Set
Yes
Next Filter Set
Available?
No
Drop Packet
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.
Filters
Filter Set
Fetch Next
Filter Rule
Yes
Next filter
No
Rule
Available?
Check
Next
Rule

Figure 7-2 Filter Rule Process

ZyWALL 10 Internet Security Gateway
Start
Packet into
filter
Fetch First
Filter Set
Fetch First
Filter Rule
No
Active?
Yes
Execute
Filter Rule
Forward
Drop
Accept Packet
7-3

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