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Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Service Name: HTTPFilter

Executable Name: lsass.exe

Log On As: LocalSystem

Description: Enables Internet Information Services (IIS) to perform Secure Sockets Layer (SSL) functions. SSL is a proposed open standard for establishing a secure communications channel to prevent the interception of critical information, such as credit card numbers. Primarily, it enables secure electronic financial transactions on the World Wide Web, although it is designed to work on other Internet services as well. If IIS is not installed, the HTTP SSL service will depend on the HTTP driver to perform SSL functions.

If this service is stopped or disabled, If this service is stopped, the IIS service would stop . Any HTTP requests aimed for IIS would not be handled.. This service is called SSL for HTTP.SYS on Windows XP Professional.

For more information about SSL, see "Secure Web Communications", in the Windows Server 2003 Resource Kit Internet Information Services Resource Guide.

Available on: Windows XP Home, Windows XP Professional; Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition and Windows Server 2003, Web Edition.

Installed through: Default operating system installation

Startup type: Manual

Service status: Stopped

This service depends on the following system components:

IIS Admin Service

Remote Procedure Call

Security Accounts Manager


The following system components depend on this service:

World Wide Web Publishing Service

IP Port Numbers used:

TCP: 43, 445

UDP: 443

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