I was recently helping out a colleague with an SQL Server Reporting Services (SSRS) installation. When it came time to configuring that instance of SSRS and making it listen on port 80 for that particular site we got The URL has already been reserved warning message, navigating to the Reporting Services URLs gives us a HTTP 500 error message.
To find the culprit I can usually use netstat -ab to find what windows process is listening on particular ports but for this instance it was simply SYSTEM, this usually means that an application is using the HTTP.SYS driver to directly listen for requests. So to work around this and find out what has bound to those ports, we use netsh http show urlacl and when I ran it on this server, I could see that ReportServer had already been enabled on Port 80.
Reserved URL : http://+:80/ReportServer/ User: NT SERVICE\ReportServer Listen: Yes Delegate: No SDDL: D:(A;;GX;;;S-1-5-80-2885764129-887777008-271615777-1216005580-2722851051)
Reserved URL : http://+:80/ User: NT SERVICE\ReportServer Listen: Yes Delegate: No SDDL: D:(A;;GX;;;S-1-5-80-2885764129-887777008-271615777-1216005580-2722851051)
I’ll show you two ways to remove these entries that have been incorrectly configured. The first is using the following command
netsh http delete urlacl http://+:80/ReportServer/
A much easier way I’ve found is to use a tool called HttpCfg.exe written by Steve Johnson which is based on a tool from MS (now obsolete). I’ve got this in my toolbox for the future, but simply open the tool, select the entry and hit delete.
Now we can re-run the SSRS Web server configuration and hit apply which should succeeded this time.