ISE 1.2: Airspace ACL vs DACL

Can someone please shed some light here:
I have a 5508 WLC & ISE 1.2.   I configured Guest Access through the use of a Sponsor Portal, and got it working.
I now want to restrict my Guest users to access the internet only and not the rest of my network.
Do I do that using a Airspace ACL & an Access List on my WLC or a DACL on my ISE box.
I'm not sure how to block the users from accessing my internal network, since I have tried both, but neither work.
Any advice please.

In ISE, dACLs are only applicable to switches.  They are ineffective with wireless connections.
An Airespace ACL is the way to go and it looks like you got it working.
The ACL should be:
permit Inbound for any to the ISE IPs and permit outbound from ISE to any.
deny any to 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 inbound (or just to your internal IP space)
permit any to any  in any direction

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