This page allows you to define LAN-to-LAN traffic where it otherwise would be blocked.

For example, let's assume we have two LANs, one primary (LAN0/br0) and one secondary (LAN1/br1). Devices on LAN0
will be able to communicate with devices on LAN1 (and the other way around).

On: Checking this enables the rule defined on this row of the table.

Src: This displays/allows you to configure the (Logical) Source LAN for the rule on that row of the table.

Src Address: This (optional) field narrows the rule to a specific IP address or set of addresses within the Src interface.

Dst: Here, you specify the (logical) Destination LAN for the rule on this row of the table.

Dst Address: (optional) narrows the rule to a specific IP address or set of addresses within the Dst interface.

Description: This is a free text field in which to enter whatever you wish as a reminder, note etctera.

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Regardless of LAN Access rules, by default a LANx device is able to reach (e.g. ping) all the router's LAN interfaces (only). This is by design.