| Tunneled mode:
- Enabling Block intra-SSID traffic will restrict communication between 2 wireless clients connected on same SSID on FortiAPs.
- In tunneled mode, the traffic will be completely blocked between 2 wireless clients on same SSID irrespective of the client associated FortiAPs (same FortiAP or different FortiAP).
Bridge mode:
- The traffic between two wireless clients will be blocked when associated to same FortiAP.
- The traffic will be allowed when wireless clients are associated to different FortiAP's (though connected to same SSID).
- Traffic coming to AP-1 through ethernet from AP-2 associated wireless clients, will be treated as wired traffic, hence will not be blocked.
In Simple, Bridge mode SSID with 'Block intra-SSID traffic' option enabled,
Wireless clients connected on Same SSID, Same FortiAP -- communication blocked
Wireless clients connected on Same SSID, but different FortiAP -- communication allowed (traffic will be considered as wired traffic between clients connected on different FortiAP's. )
This option in cli is available as 'intra-vap-privacy' under VAP configuration. Example as below,
config wireless-controller vap edit test <<<< test is the bridge SSID name
set intra-vap-privacy next end intra-vap-privacy - Enable/disable blocking communication between clients on the same SSID (called intra-SSID privacy) (default = disable). | 
