|Advanced Configuration Options / Other WLAN Settings|
When Wireless Client Isolation is enabled on a WLAN, all communication between clients and other local devices is blocked at the Access Point. To prevent clients from communicating with other nodes, the Access Point drops all ARP packets from stations on the WLAN where client isolation is enabled and which are destined to IP addresses that are not part of a per-WLAN white list.
You can create exceptions to client isolation (such as allowing access to a local printer, for example) by creating Client Isolation Whitelists.
To configure a Client Isolation Whitelist:
Configuring a Client Isolation Whitelist