Internet Authentication Service
Internet Authentication Service (IAS) is a component of Windows Server operating systems that provides centralized user authentication, authorization and accounting.
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Logging
By default, IAS logs to local files (%systemroot%\LogFiles\IAS\*) though it can be configured to log to SQL as well (or in place of).
When logging to SQL, IAS appears to wrap the data into XML, then calls the stored procedure report_event, passing the XML data as text... the stored procedure can then unwrap the XML and save data as desired by the user.
History
The initial version of Internet Authentication Service was included with the Windows NT 4.0 Option Pack.
Windows 2000 Server's implementation added support for more intelligent resolution of user names that are part of a Windows Server domain, support for UTF-8 logging, and improved security.[1] It also added support for EAP Authentication for IEEE 802.1x networks. Later on it added PEAP (with service Pack 4).
Windows Server 2003's implementation introduces support for logging to a Microsoft SQL Server database, cross-forest authentication (for Active Directory user accounts in other Forests that the IAS server's Forest has a cross-forest trust relationship with, not to be confused with Domain trust which has been a feature in IAS since NT4), support for IEEE 802.1X port-based authentication, and other features.[2]
All versions of IAS support multi domain setups. Only Windows Server 2003 supports cross forest. While NT4 version includes a Radius Proxy, Windows 2000 didn't have such a feature. Windows Server 2003 reintroduced the feature and is capable of intelligently proxy, load balance, and tolerate faults from faulty or unreachable back-end servers.
References
External links
- Internet Authentication Service on Microsoft TechNet
- Deploying Internet Authentication Service (IAS) in Windows 2003
- Internet Authentication Service in the Microsoft Windows 2000 Resource Kit
- Article describing how to log IAS (RADIUS) + DHCP to SQL
- Configure IAS RADIUS for secure 802.1x wireless LAN at archive.today (archived 2012-12-06)
- How to self-sign a RADIUS server for secure PEAP or EAP-TTLS authentication at archive.today (archived 2012-12-05)
- IAS Log parsing utility. Allows to visualize ias log files