Internet Authentication Service (System Services for the Windows Server 2003 Family and Windows XP Operating Systems)
Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2
Service Name: IAS
Executable Name: svchost.exe -k netsvcs
Log On As: LocalSystem
Description: Performs centralized authentication, authorization, auditing, and accounting of users who are connecting to a network (LAN or remote) using VPN (Virtual Private Network) equipment, RAS (Remote Access Service) equipment, or 802.1X Wireless and Ethernet/Switch Access Points. Internet Authentication Service implements the IETF standard RADIUS (Remote Authentication Dial-In User Service) protocol, which enables use of heterogeneous network access equipment.
If IAS is stopped or disabled, authentication requests will fail over to a backup IAS Server, if available. If there is no other backup IAS Servers are available, users will not be able to connect.
Available on: Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition.
Installed through: Add/Remove Programs, Add/Remove Windows Components, Networking Services
Startup type: Automatic
Service status: Started
This service depends on the following system components:
Remote Procedure Call
The following system components depend on this service: None
IP Port Numbers used:
UDP: 1645, 1646, 1812, 1813