Module name

Description

HTTP modules

CustomErrorModule

Sends default and configured HTTP error messages when an error status code is set on a response

HttpRedirectionModule

Supports configurable redirection for HTTP requests

OptionsVerbModule

Provides information about allowed verbs in response to OPTIONS verb requests

ProtocolSupportModule

Performs protocol-related actions, such as setting response headers and redirecting headers based on configuration

RequestForwarderModule

Forwards requests to external HTTP servers and captures responses

TraceVerbModule

Returns request headers in response to TRACE verb requests

Security modules

AnonymousAuthModule

Performs Anonymous authentication when no other authentication method succeeds

BasicAuthModule

Performs Basic authentication

CertificateMappingAuthenticationModule

Performs Certificate Mapping authentication using Active Directory

DigestAuthModule

Performs Digest authentication

IISCertificateMappingAuthenticationModule

Performs Certificate Mapping authentication using IIS certificate configuration

RequestFilteringModule

Performs URLScan tasks, such as configuring allowed verbs and file extensions, setting limits, and scanning for bad character sequences

UrlAuthorizationModule

Performs URL authorization

WindowsAuthModule

Performs NTLM integrated authentication

Content mondules

CgiModule

Executes CGI processes to build response output. There's also a FastCGI handler that's installed as part of the CGI install.

DavFSModule

Sets the handler for Distributed Authoring and Versioning (DAV) requests to the DAV handler

DefaultDocumentModule

Attempts to return the default document for requests made to the parent directory

DirectoryListingModule

Lists the contents of a directory

IsapiModule

Hosts ISAPI DLLs

IsapiFilterModule

Supports ISAPI filter DLLs

ServerSideIncludeModule

Processes server-side includes code

StaticFileModule

Serves static files

Compression modules

DynamicCompressionModule

Compresses responses, and applies Gzip compression transfer coding to responses

StaticCompressionModule

Performs precompression of static content

Caching modules

FileCacheModule

Provides user-mode caching for files and file handles (required)

HTTPCacheModule

Provides kernel-mode and user-mode caching in HTTP.sys (required)

SiteCacheModule

Provides user-mode caching of site information

TokenCacheModule

Provides user-mode caching of user name and token pairs for modules that produce Windows user principals (required)

UriCacheModule

Provides user mode caching of URL information (required)

Logging and diagnostics modules

CustomLoggingModule

Loads custom logging modules

FailedRequestsTracingModule

Supports the Failed Request Tracing feature

HttpLoggingModule

Passes information and processing status to HTTP.sys for logging

RequestMonitorModule

Tracks requests currently executing in worker processes, and reports information with Runtime Status and Control Application (RSCA) Programming Interface

TracingModule

Reports events to Microsoft Event Tracing for Windows (ETW)