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01-28008-0013-20050204
Fortinet Inc.
Router objects
Router
Prefix list
A prefix list is an enhanced version of an access list that allows you to control the
length of the prefix netmask.
Each rule in a prefix list consists of a prefix (IP address and netmask), the action to
take for this prefix (permit or deny), and maximum and minimum prefix length settings.
The FortiGate unit attempts to match a packet against the rules in a prefix list starting
at the top of the list. If it finds a match for the prefix, it takes the action specified for that
prefix. If no match is found the default action is deny.
For a prefix list to take effect it must be called by another FortiGate routing feature
such as RIP or OSPF.
Figure 75: Prefix list
New Prefix list
Figure 76: Prefix list name configuration
To add a prefix list name
1
Go to
Router > Router Objects > Prefix List
.
2
Select Create New.
3
Enter a name for the prefix list.
4
Select OK.
Create New
Add a new prefix list name. An access list and a prefix list cannot have
the same name.
Name
The prefix list name.
Action
The action to take for the prefix in a prefix list entry.
Prefix
The prefix in a prefix list entry.
GE
The greater than or equal to number.
LE
The less than or equal to number.
Delete, Add prefix-
list entry, and Edit
icons
Delete, add, or edit a prefix list.
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