Before you begin the IAS installation, be sure you have at least the following machine configuration.
| Component | Requirement |
| Processor | Intel Pentium or higher. |
| Memory and disk space |
32 MB RAM or higher. 27 MB hard disk or higher for installation. 10 MB hard disk or higher for runtime. |
| Operating system | Microsoft Windows NT Server version 4.0 with Service Pack 3 or later. |
Note
IAS complies with the latest Internet Engineering Task Force (IETF) standards, “Remote Authentication Dial-In User Service (RADIUS)” and “RADIUS Accounting.” At the time of this publication, these are designated as RFC 2138 and 2139, respectively, and were formerly defined as RFC 2058 and 2059, respectively. IAS is interoperable with other RFC-compliant servers. See the RFC specifications at the IETF Web site (http://www.ietf.org) for more information about the RFC-defined standards.