Technical Tip: FortiAP is not shown as online over the VPN

[Hsharma]

Description	This article describes the issue when FortiAP is not showing online on FortiGate when trying to register from a VPN.
Scope	FortiGate, FortiAP.
Solution	Topology: FortiAP<---> FortiGate1 <---IPsec---->FortiGate 2. The configuration is when FortiAP is behind FortiGate1 but needs to establish a CAPWAP tunnel with FortiGate2 at the remote site over the tunnel. FortiAP is receiving the IP address and DTLS Client Hello packets are reaching the remote FortiGate2 but remote FortiGate does not reply back.  To resolve the issue, enable the Security Fabric Connection settings at the tunnel interface as it is a minimum management requirement that FortiAP establishes a CAPWAP tunnel with the FortiGate. After enabling the Security Fabric Connection at the tunnel interface, FortiAP will be online.