sorry that this may sound a bit dumb. But I'm unable to find related information myself.
We have an Windows SBS2008 with PPTP/L2TP VPN. We would like to change to Cisco architecture. Nothing expensive though, for a small company. We would need to establish VPN connections from Windows, Mac OS X, iPhone, Android.
What do we need to achieve the goal? Which VPN server, client a.s.o.