Unfortunately the Cisco NAC solution needs both Clean Access Server (CAS) and Clean Access Manager (CAM) in order to work properly. Since the CAM retains all security policies and the CAS actually implies them into the network.
So you'll need at least one appliance of each, CAS and CAM, to have Cisco NAC solution working.
Well, as per the solution guide and style of work of NAC systems, atleast 1 CAM is required. Although TRAFFIC is supposed traverse through CAS / NAS appliances but you can configure and work through CAM GUI only .
You can use a single CAS in the network in a single location in case you have a centralized CAM for multiple locations but you would need atleast one CAM to manage all the CAS servers as all the settings and policies for CAS are stored in CAM.
Moreover, the CAS product licenses are generated based on the eth0 MAC address of the CAM, so atleast one CAS is essential.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...