Hey i have an mvc app that i have published in my azure server. I get an error when i try it in the server. In localhost in works fine. But in the server i get an error that looks like this
So my question is how can i remove that custom error. I want to see the error message that explains what the error is about?
i want the error message to be like this one
check if you have this line this line in your web config system.web area
<customErrors mode="Off" />
if you do change it to off and if not add it in
You can use web.config transform file (such as Web.Debug.config or Web.Release.config) and include the following section:
<system.web>
<customErrors mode="Off" xdt:Transform="Insert" />
</system.web>
The Web.config file will be transformed when you deploy to Azure. The transform does not occur locally.
Related
During the Pen Test, we received one vulnerability. Repro Steps was Change Host (let's say google.com) to different domain and then hit URL. Then following screen shown,
Here Version Information for dot net framework is showing. I weant through various atricals on internet and they are asking to used in web.config
This tag is already present in web.config and when we hit url without chaning Host it is showing error.aspx page but when we change Host it is showing attached page.In attached image Version Information is mentioned and I want to get rid of that.
Also on out testing envrionment,the version information is not shown with resource not found message. Is there any way to remove version information apart from customErrors tag. Please help me out. We are using IIS 10.
The tag you are already using in the web.config is probably the <customErrors> tag. and that's great for errors that can be caught at the .Net level.
But for errors that don't enter the .Net pipeline you will need to configure the IIS error page for the 404 error. This can be done via the <system.webServer><httpErrors> section of the web.config. For example to return the contents of my-iis-404-page.htm which you locate in the root directory of the website, you could use this:
<system.webServer>
<httpErrors errorMode="Custom" existingResponse="Auto">
<error statusCode="404" subStatusCode="" prefixLanguageFilePath="" path="my-iis-404-page.htm" responseMode="File" />
</httpErrors>
</system.webServer>
This configuration can also be done via the IIS gui. For more information about httpErrors aspect of IIS see https://learn.microsoft.com/en-us/iis/configuration/system.webserver/httperrors/
If you want to remove the X-Aspnet-Version HTTP header from each response from ASP.NET, add the following code to the web.config file.
<system.web>
<httpRuntime enableVersionHeader="false" />
</system.web>
I keep getting this error when trying to run my system
<system.web>
<customErrors mode="Off"/>
</system.web>
<system.web>
<customErrors mode="RemoteOnly" defaultRedirect="mycustompage.html"/>
</system.web>
First of all, enable the details of this specific error message by putting the "customErrors" tag in your "web.config" file like this:
<configuration>
<system.web>
<customErrors mode="Off"/>
</system.web>
</configuration>
Now you will get the exact error in your code and you can fix that specific error.
For security reasons, your code will not be shown in the browser for end user until you have not enabled CustomError mode="Off" in web.config file.
For security reasons .NET-Websites shows complete exceptions only, if you call them locally. To see the error message you have to choices:
Call the website through a browser on the Server (of course not possible, if you deploy to a Azure WebApp, but e.g. in a VM)
Add the first of your snippets (customErrors mode="Off") to your web.config. Then you'll see the complete exception even remotly over the network. My advice would be to set it back to the default setting after you've seen and fixed the error.
I have developed a website in asp.net and hosted it on server. It works fine with computer's but it do not run on mobile. The web.config error occurs every time.Web.config Error Occurs Every Time.
In Web.Config file do as below
<configuration>
<system.web>
<customErrors defaultRedirect="GenericError.htm"
mode="RemoteOnly">
<error statusCode="500"
redirect="InternalError.htm"/>
</customErrors>
</system.web>
</configuration>
it for the Un-handeled exception thrown when use browsing your web application. if you dont set that flag user will receive full stackstrace of error which user dont want. so it better you set the flag to On or Remoteonly in production environment.
On-Specifies that custom errors are enabled. If no defaultRedirect attribute is specified, users see a generic error. The custom errors are shown to the remote clients and to the local host.
Off-Specifies that custom errors are disabled. The detailed ASP.NET errors are shown to the remote clients and to the local host.
RemoteOnly-Specifies that custom errors are shown only to the remote clients, and that ASP.NET errors are shown to the local host. This is the default value.
Read more : https://msdn.microsoft.com/en-us/library/h0hfz6fc(v=vs.100).aspx
I've been investigating this thing for hours but couldn't understand what's the problem causing this behavior.
I have built a simple ASP.NET MVC app to upload and delete photos from a predefined container on the Azure Storage Server.
It works perfectly when I run the application on my machine, locally.
Also, it works perfectly when I run this on my machine but the Data service is located on Azure.
But, when Publishing the application to Azure, surfing to this website runs to this uninformative error:
Server Error in '/' Application.
Runtime Error
Description: An application error occurred on the server. The current
custom error settings for this application prevent the details of the
application error from being viewed remotely (for security reasons).
It could, however, be viewed by browsers running on the local server
machine.
Details: To enable the details of this specific error message to be
viewable on remote machines, please create a tag within
a "web.config" configuration file located in the root directory of the
current web application. This tag should then have its
"mode" attribute set to "Off".
<!-- Web.Config Configuration File -->
<configuration>
<system.web>
<customErrors mode="Off"/>
</system.web>
</configuration>
Notes: The current error page you are seeing can be replaced by a
custom error page by modifying the "defaultRedirect" attribute of the
application's configuration tag to point to a custom
error page URL.
<!-- Web.Config Configuration File -->
<configuration>
<system.web>
<customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
</system.web>
</configuration>
This doesn't tell me anything, also - nothing like this happens when running on my machine with Visual Studio.
If you have any idea what's going on here I'd really appreciate your help, thanks.
I have a custom config file in my application say my.config. Suddenly I ecnountered with some error regarding one of the settings inside the config file and the strange thing happens- my content of the config file get's rendered in the browser in the form of error. This is a big security issue for me. My question is how to prevent the content of my config files from rendering in the browser. Note I have already this setting in my web config:
<customErrors mode="Off" defaultRedirect="errors/default.aspx"/>
I am wondering why did not it redirect to error page? we had the settings turned on
still it displayed the straight error.
Are you running IIS7? I think you have to add a section to the new system.webServer section of your web.config file to change the behavior of the custom error page. Open IIS and check the settings for the error page setting.
In web.config it should be something like this,
<configuration>
<system.webServer>
<httpErrors errorMode="DetailedLocalOnly">
</httpErrors>
</system.webServer>
</configuration>
/Viktor
set the customErrors mode="On".