Internet Information Services

From Academic Kids

IIS (Microsoft Internet Information Services or Server) is a set of Internet based services for Windows machines. Originally supplied as part of the Option Pack for Windows NT, they were subsequently integrated with Windows 2000 and Windows Server 2003. The current (Windows 2003) version is IIS 6.0 and includes servers for FTP, SMTP, NNTP and HTTP/HTTPS. Earlier versions also included a Gopher server.

Contents

Features

The web server itself can not directly perform server side processing but can delegate the task to ISAPI applications on the server. Microsoft provides a number of these, including ones for Active Server Pages and ASP.NET. Third parties have provided support for PHP and Perl languages in the same way.

Compatibility

Internet Information Services is designed to run on Windows server operating systems. A restricted version that supports one web site and a limited number of connections is also supplied with Windows XP Professional.

Versions

Security

IIS has been attributed with a number of security exploits, most of which were in fact issues within the lesser used ISAPI handlers. With Windows Server 2003 Microsoft finally elected to turn off all ISAPI handlers by default thereby giving the web server a much more secure "out of the box" configuration.

Microsoft has also changed the server account that IIS runs on. In versions of IIS before 6.0, all the features were run on the System account, allowing exploits to run wild on the system. Under 6.0 many of the processes have been brought under a Network Services account which has fewer privileges. In particular this means that if there is an exploit on that feature, it wouldn't necessarily compromise the entire system.

Competitors

Apache is the dominant software in the web server market and IIS's main competitor. Solaris Operating Environment/J2EE also competes in the enterprise web services arena.

External links

es:Internet Information Services fr:Internet Information Services it:Internet Information Services ja:Internet Information Services pl:IIS pt:Internet Information Services sv:Microsoft Internet Information Services nl:Internet Information Services zh:iis

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