ReportViewer control fails via IIS web farm

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AlekseyKrotov-5524 asked May 13, '22 AlekseyKrotov-5524 edited May 19, '22

ReportViewer control fails via IIS web farm

I've web farm configuration:

firewall -> IIS farm -> IIS web server
VPN client -> VPN server ---^

IIS Web server hosts ASP .Net MVC site with ReportViewer control, that points to internal SSRS server.
It works fine when I connect through VPN (w/o IIS rewrite rules):

When I try to reach the same page from Internet I got following error:

Report Viewer Configuration Error
The Report Viewer Web Control HTTP Handler has not been registered in the application's web.config file. Add <add verb="" path="Reserved.ReportViewerWebControl.axd" type = "Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" /> to the system.web/httpHandlers section of the web.config file, or add <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" /> to the system.webServer/handlers section for Internet Information Services 7 or later.

dotnet-csharp sql-server-reporting-services windows-server-iis dotnet-aspnet-webforms

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Answer 1 · 2022-05-16T02:05:13.607Z

Joyzhao-MSFT answered May 16, '22 AlekseyKrotov-5524 commented May 16, '22

Hi @AlekseyKrotov-5524 ,

Add the following to <system.web> => <httpHandlers> section.

 <add verb="" path="Reserved.ReportViewerWebControl.axd" type = "Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />

Add the following to <system.webServer> => <handlers> section.

 <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=15.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />

Please refer to: ASP.Net: The Report Viewer Web Control HTTP Handler has not been registered in the application's web.config.

The Report Viewer Web Control HTTP Handler has not been registered in the application's web.config file
Best Regards,
Joy

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Joyzhao-MSFT · May 16 at 02:26 AM

In 2017 and later versions, the default path of the web config file is as follows:
C:\Program Files\Microsoft SQL Server Reporting Services\SSRS\ReportServer

Modify the file as follows:

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AlekseyKrotov-5524 Joyzhao-MSFT · May 16 at 05:48 AM

I've 3 levels:
- IIS ARR reverse proxy that redirects requests to correct IIS server/farm. It stands right after a firewall.
No ASP .Net is installed or configured there.
- IIS web server with a site with added ASP .Net ReportViewer control
(there're already required records):

SSRS server.

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AlekseyKrotov-5524 AlekseyKrotov-5524 · May 16 at 07:09 AM

More of it Safari returns broken web interface (in compare to Chrome):

Error list:

Problem AXD link is accessible:

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Answer 2 · 2022-05-17T12:04:38.76Z

AlekseyKrotov-5524 answered May 17, '22 AlekseyKrotov-5524 commented May 19, '22

@Joyzhao-MSFT what do you think?

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Joyzhao-MSFT · May 19 at 08:01 AM

Since this kind of question is beyond my ability, I suggest you add winform/webform/dotnet related tags on this kind of question for more expert help.

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AlekseyKrotov-5524 Joyzhao-MSFT · May 19 at 10:29 AM

OK, thanks. I updated tags list

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