This topic provides a sample of firewall policy views and firewall policy lookup.
In Policy & Objects policy list page, there are two policy views: Interface Pair View and By Sequence view.
Interface Pair View displays the policies in the order that they are checked for matching traffic, grouped by the pairs of Incoming and Outgoing interfaces. For example, all policies referencing traffic from WAN1 to DMZ are in one section. The policies referencing traffic from DMZ to WAN1 are in another section. The sections are collapsible so that you only need to look at the sections you want.
By Sequence displays policies in the order that they are checked for matching traffic without any grouping.
The default display is Interface Pair View. You can switch between the two views except if any or multiple-interfaces are applied in the policy.
How Any or multiple-interfaces policy can change the Interface Pair View
The FortiGate unit automatically changes the view on the policy list page to By Sequence whenever there is a policy containing any or multiple-interfaces as the Source or Destination interface. If the Interface Pair View is grayed out, it is likely that one or more policies have used the any or multiple-interfaces.
When you use the any or multiple-interfaces, the policy goes into multiple sections because it might be any one of a number of interface pairings. Policies are divided into sectioned using the interface pairings, for example, port1 to port2.
Each section has its own policy order. The order in which a policy is checked for matching criteria to a packet’s information is based solely on the position of the policy within its section or within the entire list of policies. If the policy is in multiple sections, FortiGate cannot place the policy in order in multiple sections. Therefore the view can only be By Sequence.
Firewall policy lookup is based on the
Source_interfaces/Protocol/Source_Address/Destination_Address that matches the
dst-port of the protocol. Use this tool to find out which policy matches specific traffic from a number of policies. After completing the lookup, the matching firewall policy is highlighted on the policy list page.
The Policy Lookup tool has the following requirements:
- Transparent mode does not support Policy lookup function.
- When executing the policy lookup, you need to confirm whether the relevant route required for the policy work already exists.
This example uses the TCP protocol to show how policy lookup works:
- In Policy & Objects policy list page, click Policy Lookup and enter the traffic parameters.
- Click Search to display the policy lookup results.