For the Linux components (Identity Server, Administration Console, SSL VPN, Access Gateway Appliance and Service), you should select a platform supported by SUSE Linux Enterprise Server (SLES) 11 SP2 or SLES 11 SP3, Red Hat Enterprise Linux (RHEL) versions 6.4 or 6.5.
For the Windows components (Identity Server, Administration Console, Access Gateway Appliance and Service), you should select a platform supported by Windows 2008 Server R2 Standard or Enterprise Edition.
For the hard disk, RAM, and CPU requirements, see the requirements for the individual components.