The Cisco VPN client does not currently work with Windows 8 and I haven't found a well defined way to use the built-in VPN capability in Windows to connect to EMC's VPN gateway.  The latest beta version of the Shrew VPN client (www.shrew.net) works with Cisco and can even import the .pcf files from the Cisco client.  So if you have clients testing with Windows 8 who need VPN access, point them to ShrewSoft.