Re: migration from ACS 4.2 NAR

I want to know if it’s possible to do NAR (network access restriction) in freeradius like in ACS;

Example: I am able to permit only certain user based on their active directory group to connect to my certain wireless SSID.

Yes. You can use LDAP-Groups and the users file to do the mappings. It's relatively simple once you've configured the LDAP module.

Also I use ACS to configure Downloadable IP ACLs for the VPN access

Does freeradius have similar option?

It's just RADIUS, if you know the attribute definitions then you can make it work. -Arran