we have a main site that contains (1)CAM and (1) CAS and 250 users. we have 5 remote sites that connect to an ASA 5520 via DSL point to point VPN connections. There is no internet at these sites locally, they all access the internet through the main site. The remote sites have the same vlan setup as the main site. my core switch is a 3750 stack and all switches at remote sites are 3750's.
my question is do I need to place a CAS at each one of these locations or is there a possiblity to use the CAS at the main site. also if you could give recommedation on IB or OOB for this deployment. thanks