"The page you are requesting cannot be served because of the extension configuration." error message

Question

I'm getting this error message when trying to run my application. I don't know how to fix it:

HTTP Error 404.3 - Not Found The page you are requesting cannot be served because of the extension configuration. If the page is a script, add a handler. If the file should be downloaded, add a MIME map.

Here's a screenshot of the error page: alt text

What can I do to fix this error?

the source code would be more helpful rather then the error page — gsharp, Dec 08 '10 at 13:38
After following the above instruction then also if you getting same error then go through with below link and follow the steps [Click Here](http://winsecondproblems.blogspot.in/2011/01/http-error-4043-not-foundthe-page-you.html) — Raj, Mar 05 '13 at 10:31

score 283 · Answer 1 · edited Dec 30 '18 at 21:10

283

In Windows 8/10, you have to use

Open Control Panel →
Programs and Features →
Turn Windows features on or off →
Internet Information Services (IIS) →
World Wide Web Services →
Application Development Features →
Check the appropriate items, such as enabling ASP.NET. (i.e install the appropriate version you want to configure your websites with)

Reference: Check the solution of this question for reference

edited Dec 30 '18 at 21:10

Stein Åsmul

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answered Feb 19 '13 at 03:50

JohnOpincar

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I had to check `.NET Framework 4.5 Advanced Services` > `WCF Services` > `HTTP Activation` – Kevin Brydon Mar 21 '13 at 21:54
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run this command from an administrator command prompt: "dism /Online /Enable-Feature /FeatureName:WCF-HTTP-Activation /all", or "dism /Online /Enable-Feature /FeatureName:WCF-HTTP-Activation45 /all" – Paul Suart Oct 14 '13 at 21:20
Just when I got used to running regiis, microsoft goes and changes it up again. Well at least this is much easier - similar change to installing WIF. Now they should add SQL to Turn Windows Features On/Off. – Shawn J. Molloy Apr 04 '14 at 00:52
1

@KevinBrydon - Thank you very much! Your tip was very helpful to resolve the issue on Windows 2012 R2. – Amil Waduwawara May 13 '15 at 04:53
In Windows server 2012 R2, enabling "Http Activation" worked for me. – Dhanuka777 May 20 '15 at 11:42
I got this in .Net 3.5 WCF and fixed `.Net Framework 3.5` > `Windows Communication Foundation HTTP Activation` – Nishantha Oct 12 '15 at 07:29
1

@KevinBrydon That solves it. That is just to awesome to be a simple comment. It has more votes than the actual answer. Maybe you should make this an answer? – José Ramón Dec 07 '15 at 09:24
Thanks man! It also fixes the problem with VS refusing to debug the application using local IIS giving an error "unable to start debugging on the web server". Everything works perfectly now! – Maksim Oct 03 '16 at 14:49
Doh! Worked for me. Just amazing how much time one can waste on such simple problems. up vote – Yogi Jul 21 '17 at 20:45
Missing in Windows Server 2019 (sigh) – Doug Null May 18 '19 at 21:17
Perfect. Thanks. – jancha Sep 06 '19 at 21:59
The final touch was indeed HTTP Activation. Thank you @KevinBrydon – Nelssen Apr 24 '20 at 12:38
@KevinBrydon 9 years later and your comment is still saving many hours of frustration. Thank you! – Dylan Aug 23 '22 at 20:01

score 179 · Accepted Answer · edited Aug 07 '17 at 19:51

179

Use aspnet_regiis.exe to register version of .NET framework you are using.

This is a common issue and happens when IIS is installed after VS or .NET framework.

Note - for Windows 8/10 users, see the other answer by JohnOpincar below. And also the comment/tip from Kevin Brydon.

edited Aug 07 '17 at 19:51

Cheeso

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answered Dec 08 '10 at 13:39

Aliostad

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As a matter of fact I did install Visual Studio first and then IIS. I'm currently running "aspnet_regiis.exe -i" command. Hopefully this fixes the error. – Dec 08 '10 at 13:43
5

Worked for me as well when I got this error when trying to access a .svc WCF service. – atconway Sep 20 '12 at 12:14
Note - for Windows 8 users see the other answer by JohnOpincar below – KyleK Jun 12 '15 at 13:25
+1 For anyone else finding this via Search you might find it easier to perform a Repair on the .NET Install instead of attempting to run aspnet_regiis.exe as the path of least resistance and resolves the issue. We're seeing this a lot on boxes that have installed .NET 4.5.2 (via Windows Update) prior to installing the IIS Role, its a bit frustrating because these boxes will show .NET 4 as an option in their app pool, but if your application requires .NET 4.5 like ours does it'll fail with the above message. – aolszowka Sep 29 '15 at 16:01

score 162 · Answer 3 · edited Dec 12 '16 at 04:26

162

I fixed that on my Windows 10:

Go to Control Panel - Programs and Features - Turn Windows features on or off.
Select .NET Framework 4.6 Advanced Services - WCF Services
Check HTTP Activation.
OK done.

edited Dec 12 '16 at 04:26

Pang

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answered Mar 14 '16 at 04:49

Quan Nguyen

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Works for me on Windows 10! Thank you! – Sergey Malyutin Jun 22 '16 at 16:13
1

Works for me on win 8.1 also – Qerts Jul 05 '16 at 19:31
Worked on Win10 iis7 – noCodeMonkeys May 17 '17 at 01:51
This works after upgrading to Windows 1709 and having to reinstall my IIS – garrettendi Feb 21 '18 at 10:38
Perfectly working for me.Ideal solution if you are getting like "This error occurs when the file extension of the requested URL is for a MIME type that is not configured on the server" – eranda.del Apr 02 '18 at 14:47
First follow the step mentioned by @JohnOpincar then check this option. It would work. – Amit Patel Nov 16 '18 at 17:48
It was my problem on Windows 10 / Home edition and it solved problem. Thnx – Shaahin Apr 18 '19 at 10:51
Wow, Worked for me too in Windows server 2016 – Software Enginner Jun 05 '19 at 15:52
It's ok ! Thank you – Peiman Noroozi Apr 15 '20 at 06:00
Thanks bud. I looked under windows features 1000 times but i was looking under IIS and not .net – Ted Oct 27 '20 at 06:46
Worked for me. windows 10 – Kasun Mar 05 '21 at 06:26
Worked great on Windows Server 2019. It was .NET v4.7 in my case. – planetregin Jul 07 '21 at 19:59
Work for me too in win10!!! – user976385 Sep 19 '21 at 10:46
Work for me too in windows 11!! – Bhadresh Patel Jan 17 '23 at 13:42

score 96 · Answer 4 · answered Jul 25 '14 at 20:30

96

In my case I needed to add MIME types for each file extension that I wanted to serve to web config:

<system.webServer>
    <staticContent>
      <mimeMap fileExtension=".shp" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".dbf" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".kml" mimeType="text/xml" />
    </staticContent>
    ...
</system.webServer>

answered Jul 25 '14 at 20:30

Mahmood Dehghan

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1+ it fixed my problem... i was trying to load the `.json` and i was keep getting the OP error and finally I end-up adding the `mimeMap` in my web.config and solved the problem – Nick Kahn Jul 30 '15 at 14:08
Do I need to add MIME type for asmx file as well? – Shilpa Soni Aug 22 '15 at 09:01
@ShilpaSoni asmx files are asp.net server files (not static content). so you can't and you don't need to download them from client. – Mahmood Dehghan Aug 23 '15 at 19:10
1

And [here's](http://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types) a map of file extensions to their appropriate mimeType, found from [this](http://stackoverflow.com/questions/7609208/complete-list-of-mime-type-file-extension-mapping) SO question – Nate Anderson Dec 23 '15 at 19:43
thanks you this works for yaml for .net framework 4.8 ` ` – Hassaan Raza Now Jun 23 '22 at 06:57

Daniel · Answer 5 · 2012-11-26T17:02:00.900

In case this helps anyone, I was getting this error when attempting to run aspnet_regiis.exe:

Operation failed with 0x8007000B

An attempt was made to load a program with an incorrect format

As it turns out, the server was running 2008 64 bit and I was trying to run the 32 bit version of the utility. Running the version found in \Windows\Microsoft.NET\Framework64\v2.0.50727 fixed the issue.

c:\Windows\Microsoft.NET\Framework64\v2.0.50727>aspnet_regiis.exe -i

score 8 · Answer 6 · answered Oct 29 '15 at 20:22

8

I fixed my issue on Windows 2012 server by Installing ALL WCF Features.

A) Server Manager > Manage[link top left] > Add Roles and Features

B) In Features > .Net Framework 4.5 Features > WCF Services

C) Check (enable) the features. I checked all.

D) Install

answered Oct 29 '15 at 20:22

Demodave

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I checked only HTTP Activation and TCP Activation and it worked for me. Thank you anyway! – Aleksei Mialkin Aug 22 '16 at 03:09

score 7 · Answer 7 · answered Feb 14 '17 at 14:33

Running Windows Server 2008 R2 64bit and .net framework 4.5, ran this command from this location, and was successful:

C:\Windows\Microsoft.NET\Framework64\v4.0.30319>aspnet_regiis -i

output:

Microsoft (R) ASP.NET RegIIS version 4.0.30319.0
Administration utility to install and uninstall ASP.NET on the local machine.
Copyright (C) Microsoft Corporation.  All rights reserved.
Start installing ASP.NET (4.0.30319.0).
.....
Finished installing ASP.NET (4.0.30319.0).

score 7 · Answer 8 · edited Apr 01 '14 at 17:10

I've just had the same situation with my customer. We have our own product which installs a web site. The installer configures everything: the IIS pool, the site, web.config, etc.

We installed another web site using our installer. We entered the same parameters, so web.configs happened to be the same in both sites.

However, the newly installed site worked fine, while the old one didn't. Then I opened 2 IIS Manager windows and started comparing the difference in web site settings. And I found a problem.

Somebody deleted all the Handler Mappings with the old site. If you go to "Handler mappings", you should see there aspx, asmx and other extensions and names of the handlers. So, in the old site all those records were missing.

So, I would suggest first to check the "Handler mappings" - there must be a lot of records there. Create a new web site and compare to know how many should there be.

Who deleted them, a person or another program, I have no idea. If somebody can tell if there exists some tracking application which would tell that user domain\john was modifying web site at date "07.03.2012 12:34" that would be useful.

Could it have been a [Microsoft security update](http://serverfault.com/q/630694/14642)? — Roman Starkov, Sep 23 '14 at 22:51

score 3 · Answer 9 · answered Apr 04 '15 at 21:15

As @Mahmoodvcs mentioned i was require to set/add MIME types for the file extension that I needed to host/download directly, in this case is a Heroku's dump file (postgres's database backup), so in order to set a public IIS server where you can download this files without requiring AWS S3 bucket or HTTP shares like dropbox this is a terrific option!

<staticContent>
  <mimeMap fileExtension=".dump" mimeType="application/octet-stream" />
</staticContent>

score 3 · Answer 10 · answered Jul 21 '16 at 10:44

3

To add an extension to serve in IIS follow -

Open IIS Manager and navigate to the level you want to manage.
In Features View, double-click MIME Types.
In the Actions pane, click Add.
In the Add MIME Type dialog box, type a file name extension in the File name extension text box. ... Type a MIME type
in the MIME type text box.
Click OK.

answered Jul 21 '16 at 10:44

Shahadat Hossain Khan

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I tested this solution in the case of .ts (Type Script Files) you must declare in the MIME type Typescript fields (.ts) I use text/x.typescript as mime type – freedeveloper Apr 07 '17 at 20:05

score 2 · Answer 11 · answered Jun 13 '13 at 20:16

2

I too had this error, on Windows Server 2008 IIS 7, I had no visual studio installed so a reinstall / repair of .NET 4.0 did the trick.

answered Jun 13 '13 at 20:16

Leigh

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score 2 · Answer 12 · answered Mar 11 '19 at 16:39

2

For Windows Server 2016

Open Server Manager form
Manage -> Add Roles and Features
Next until Features page
Check WCF Services feature with all subfeatures
Next and Install

answered Mar 11 '19 at 16:39

Serkan Arslan

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score 2 · Answer 13 · answered Mar 07 '12 at 11:34

By the way, I've just found out this post: http://blogs.msdn.com/b/webtopics/archive/2010/03/19/iis-7-5-how-to-enable-iis-configuration-auditing.aspx it explains how to audit changes on IIS. For those who face similar problems I suggest to turn on auditing and later see why your site stopped working.

score 1 · Answer 14 · answered Nov 15 '16 at 19:02

Related to Server 2016, I should add:

Run this command: aspnet_regiis -lv from this dir: C:\Windows\Microsoft.NET\Framework\v2.0.50727\ This gives you the best view of what is going on
On Server 2016, installing .net and iis out of sequence does not seem to be a problem.
What is more likely to be a problem on Server 2016 is simply that asp.net is not installed on the machine.

score 1 · Answer 15 · answered Feb 18 '20 at 01:18

If you are trying to view an extensionless file what worked for me was adding a MIME Type: File name extension: . MIME type: text/plain

This might have some MVC implications, especially if your Static File Handler is above the Extensionless... handlers (under IIS / Handler Mappings) but might be a work around when you only need this temporarily, like activating SSL Certs.

score 0 · Answer 16 · edited May 11 '15 at 03:55

0

Verify that the application pool in IIS (in the case of IIS7 or above) is selected as integrated. In this case, probably change to Classic can solve this problem.

edited May 11 '15 at 03:55

hkf

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answered Dec 05 '13 at 18:35

user1006743

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score 0 · Answer 17 · answered Jan 13 '15 at 16:43

0

I was trying to set up MediaWiki on my windows 7 pc and got this error.

My solution was to "create a global FastCGI handler mapping for php".

answered Jan 13 '15 at 16:43

TomSelleck

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Quickee · Answer 18 · 2019-09-28T17:36:42.733

PHP 7.3 Application IIS on Windows Server 2012 R2

This was a two step process for me.

1) Enable the WCF Services - with a server restart

2) Add a FASTCGI Module Mapping

1)

Go to Server Manager > Add roles and features Select your server from the server pool Go to Features > WCF Services I selected all categories then installed

2)

Go to IIS > selected the site In center pane select Handler Mappings Right hand pane select Add Module Mappings

Within the edit window:

Request path: *.php

Module: FastCgimodule

Executable: I browsed to the php-cgi.exe inside my PHP folder

Name: PHP7.3

Now that I think about it. There might be a way to add this handler mapping inside the web-config so if you migrate your site to another server you don't have to add this mapping over and over.

EDIT: Here it is. Add this to the section of the web-config.

<add name="PHP-FastCGI" verb="*" 
  path="*.php" 
  modules="FastCgiModule"
  scriptProcessor="c:\php\php-cgi.exe" 
  resourceType="Either" />

score 0 · Answer 19 · edited Dec 23 '19 at 08:29

0

Set video to your IIS MIME Type

This solved my problems.

Ref: https://stackoverflow.com/a/8853443/8832133

edited Dec 23 '19 at 08:29

4b0

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answered Dec 23 '19 at 08:19

DoubleX

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score 0 · Answer 20 · answered Aug 30 '23 at 12:39

0

I faced the same error on Windows Server 2022 Standard when I dployed wcf service app.For solution I inslatted HTTP Activation (suggested by kevin-brydon) .

answered Aug 30 '23 at 12:39

Yusif Karimov

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"The page you are requesting cannot be served because of the extension configuration." error message

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