Wifi-to-Wifi client ssh on DI-524

Is there some special trick to getting interactive ssh connections
running between WiFi clients on a single access point?

The AP is a D-Link DI-524 wireless/wired router. Wired connections
behave as one might expect, but connections between wireless clients
seem to be blocked. It's been suggested this is deliberate, to prevent
tampering between wireless clients, under the name Guest Mode.

The DI-524 manual makes no mention of Guest Mode, did it go by some
other name in the past? The router implements a long list of firewall
and VPN options, but it appears they control the WAN/LAN data flow.

Is there some special term for WiFi-to-WiFi traffic, and does it get
special handling by default?

Thanks for reading,

bob prohaska