I use pfsense in my network and it works great. Pfsense version is 2.1.

In my configuration i have 3 NIC:

WAN - PPPoE configuration
LAN - 192.168.1.254/24
WIFI - 172.16.200.254/24

NIC WIFI is to wireless services with a captive portal.

Now, i want to add 4 subnet IPs to the WIFI interface, with the following IP:
172.16.201.100/24
172.16.201.101/24
172.16.201.102/24
172.16.201.103/24

By searching in the web, after version 2.0 its possible to use VIP IP alias, but i'm not doing the right stuff.

I want that subnet IPs only can comunicate to the NIC WIFI and not to LAN.

Can anyone point me a direction?

Best regards