Asus GigaX2048 - Manual (Page 47)

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GigaX2024/2048 L2 Managed Switch User Manual
Figure 43. USM User
4.7 Filters
The switch can filter certain traffic types according to packet header information
from Layer 2 to Layer 4. Each filter set includes a couple of rules. You have to
attach the filter set to certain ports to make the filter work.
4.7.1 Filter Set
You can create a filter set by giving a name, ID and a mode of rules. The switch
defines two modes of rules, one is MAC mode and the other is IP mode. Only
the same mode of rules can bundle together to form a filter set. Each mode has
different fields to configure. For example, you can use IP mode rule to filter FTP
packets. The string of filter name cannot include characters ʻ/ʼ, ʻ#ʼ, ʻ&ʼ and space.
When you click on the Set, the Filter Set page appears (Figure 39). First, create
a filter set by typing a name and ID, then clicking on Add. Second, click on the
button to select the set you want to edit or remove. Third, click on Edit to
enter the rule page as Figure 40, or click on Remove to remove the filter set.
You have to follow the rules to make a valid filter set.
• One set consists of a type of rules. The rules having the same fields to filter
packets belong to one type. For example, two rules filter packets with two
destination IP addresses, then they are the same type. But a rule filtering
source IP address does not belong to the same type.
• Four types of rules can apply to ports at the same time. If there are more
than four types, the system automatically disables the rules.