About URL reservations and registration (Report Server Configuration Manager)

URLs for Reporting Services applications are defined as URL reservations in HTTP.SYS. A URL reservation defines the syntax of a URL endpoint to a Web application. URL reservations are defined for both the Report Server Web service and the web portal when you configure the applications on the report server. URL reservations are created for you automatically when configure URLs through Setup or the Reporting Services Configuration tool:

  • Setup creates URL reservations using default values. If Setup installs the default configuration, it reserves two URLs; one for the Report Server Web service, and another for the web portal. You can use the Reporting Services Configuration tool to add more URLs or modify the default URLs that Setup creates.

  • The Reporting Services Configuration tool creates a URL reservation based on the URL you specify in the Web Service URL or Web Portal URL pages in the tool.

Both Setup and the tool also assign permissions on the URL to the Report Server service, check for duplicate instances, and add the URL reservation to HTTP.SYS. Never create or modify a Reporting Services URL reservation directly using HttpCfg.exe or other tool. If you skip a step or set an invalid value, you encounter problems that might be difficult to diagnose or fix.


HTTP.SYS is an operating system component that listens for network requests and routes them to a request queue. In this release of Reporting Services, HTTP.SYS establishes and maintains the request queue for the Report Server Web service and the web portal. Internet Information Services (IIS) is no longer used to host or access Reporting Services applications. For more information about HTTP.SYS functionality, see HTTP Server API.

URLs in Reporting Services

In a Reporting Services installation, you can access the following tools, applications, and items through URLs:

  • Report Server Web service

  • Web portal

  • Reports published to a report server

Other published URL-addressable items, such as shared data sources, shouldn't be accessed through URLs as stand-alone items. The report server doesn't display those items in a meaningful format when viewed in a browser window.


This article does not describe URL access to specific reports that are stored on the report server. For more information about URL access to these items, see Access report server items by using URL access.

URL reservation and registration

A URL reservation defines the URLs that can be used to access a Reporting Services application. Reporting Services reserves one or more URLs for the Report Server Web service and the web portal in HTTP.SYS, and then register them when the service starts. By appending parameters to the URL, you can open reports through the Web service. Reservations and registration are provided by HTTP.SYS. For more information, see Namespace reservations, registration, and routing.

URL reservation is a process by which a URL endpoint to a Web application is created and stored in HTTP.SYS. HTTP.SYS is the common repository of all URL reservations that are defined on a computer and defines a set of common rules that guarantee unique URL reservations.

URL registration occurs when the service starts. The request queue is created and HTTP.SYS begins routing requests to that queue. A URL endpoint must be registered before requests that are directed to that endpoint are added to the queue. When the Report Server service starts, it registers all URLs that it reserves for all enabled applications. So the Web service must be enabled in order for registration to occur. If you set the WebServiceAndHTTPAccessEnabled property to False in the Surface Area Configuration for Reporting Services facet of Policy-Based Management, the URL for the Web service doesn't register when the service starts.

URLs are unregistered if you stop the service or recycle the Web service or the web portal application domain. If you modify a URL reservation while the service is running, the report server recycles the application domain immediately so that the old URL can be unregistered and the new one put into use.

A few simple examples illustrate the concept of a URL reservation and how it relates to URL addresses used for Reporting Services applications. A key point to notice is that the URL reservation has different syntax than the URL you use to access the application:

URL Reservation in HTTP.SYS URL Explanation
https://+:80/reportserver https://<computername>/reportserver


The URL reservation specifies a wildcard (+) on port 80. This puts into the report server queue any incoming request that specifies a host that resolves to the report server computer on port 80. Notice that with this URL reservation, any number of URLs can be used to access the report server.

This URL reservation is the default for a Reporting Services report server for most operating systems. This URL reservation specifies an IP address and is much more restrictive than the wildcard URL reservation. Only URLs that include the IP address can be used to connect to the report server. Given this URL reservation, a request to a report server at https://<computername>/reportserver or https://localhost/reportserver would fail.

Default URLs

If you install Reporting Services in the default configuration, Setup reserves URLs for the Report Server Web service and the web portal. You can also accept these default values when you define URL reservations in the Reporting Services Configuration tool. Default URLs include an instance name if you install SQL Server Express or if you install Reporting Services as a named instance.


The instance character is an underscore character (_).

URL reservations include a port number. The following operating systems allow multiple Web applications to share a port:

  • Windows Server 2012 R2

  • Windows Server 2012

  • Windows Server 2008 R2

  • Windows Server 2008

  • Windows 7

  • Windows Vista

Instance Type Application Default URL Actual URL reservation in HTTP.SYS
Default instance Report Server Web service https://<servername>/reportserver https://<servername>:80/reportserver
Default instance Web portal https://<servername>/reports https://<servername>:80/reports
Named instance Report Server Web service https://<servername>/reportserver_<instancename> https://<servername>:80/reportserver_<instancename>
Named instance Web portal https://<servername>/reports_<instancename> https://<servername>:80/reports_<instancename>
SQL Server Express Report Server Web service https://<servername>/reportserver_SQLExpress https://<servername>:80/reportserver_SQLExpress
SQL Server Express Web portal https://<servername>/reports_SQLExpress https://<servername>:80/reports_SQLExpress

Authentication and service identity for Reporting Services URLs

Reporting Services URL reservations display the account of the URL reservation. The virtual service account is used for all URLs that are created for the Reporting Services applications that run in the same instance.

Anonymous access is disabled because the default security is RSWindowsNegotiate. For intranet access, report server URLs use network computer names. If you want to configure Reporting Services for Internet connections, you must use different settings. For more information about authentication, see Authentication with the report server.

URLs for local administration

You can use https://localhost/reportserver or https://localhost/reports if you specified a strong or weak wildcard for the URL reservation.

The https://localhost URL is interpreted as If you pegged the URL reservation to a computer name or single IP address, you can't use localhost unless you create an extra reservation for on the local computer. Similarly, if localhost or is disabled on your computer, you can't use that URL.

Windows Vista, Windows Server 2008 and later include new security features to minimize the risk of accidentally running programs with elevated privileges. Extra steps are necessary to enable local administration on these operating systems. For more information, see Configure a Native mode report server for local administration (SSRS).