You can install ACS on a server, if its trial, it will during install tell you the same. But rather then going though that, you can provide the contract number under which you purchased ACS 4.x to TAC, and TAC will provide you with the complete Full download image. No CD, but you'll have complete Full software package, that you can burn and keep.
Other then that, here are the specification for 4.0 & 3.3,
acs 4.1.x is also supported on some tested vmware platform,
System requirements are documented in the Installation Guide for Cisco Secure ACS 4.1 Windows. The following updates have been made to the ACS system requirements. ACS 4.1 supports:
?Pentium dual-core processors. This support is with Intel but not Advanced Micro Devices (AMD).
?VMware. ACS 4.1 was tested on the following VMWare platform:
?VMWare ESX server 3.0.0
?Processor?AMD Opteron Dual core
?# of Virtual machines?4
?Guest operating system?Windows 2003 Standard Edition
?RAM for each guest operation system?3 GB
And if you want to apply Service Pack 2 on Windows 2003 server, Then I would suggest you to wait for a month or two, before you apply that patch, as it will be supported/tested on version 4.1.4 (yet to be released).
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...