In a manual (peer to peer) configuration the WAN optimization tunnel can be set up between one client-side FortiGate unit and one server-side FortiGate unit. The peer ID of the server-side FortiGate unit is added to the client-side WAN optimization policy. When the client-side FortiGate unit initiates a tunnel with the server-side FortiGate unit, the packets that initiate the tunnel include information that allows the server-side FortiGate unit to determine that it is a manual tunnel request. The server-side FortiGate unit does not require a WAN optimization profile; you just need to add the client peer host ID and IP address to the server-side FortiGate unit peer list and from the CLI an explicit proxy policy to accept WAN optimization tunnel connections.

In a manual WAN optimization configuration, you create a manual WAN optimization security policy on the client-side FortiGate unit. To do this you must use the CLI to set wanopt-detection to off and to add the peer host ID of the server-side FortiGate unit to the WAN optimization security policy.