I am using plesk'shared hosting server to host my website. Constantly getting ViewState MAC failed error
Plesk won't be able to provide any Machine Key. As it is shared hosting.
I have also attached the screenshot. please help.
Earlier This issue was coming in one page only. I have resolve it by converting it to JavaScript and ajax call in order to Stop AutoPostBack.
But now this is coming in many pagaes.
Add following link in your web.config file.
Above line should be included within section.
OR
if you don't want this solution to implemented on project level then you can add these attribute to the page(Top most line of HTML view) directive of the page which is creating issue.
That means you have to add enableEventValidation="false" viewStateEncryptionMode="Never" in page directive.
Background: I'm developing a website in ASP.NET with VB.NET backend, .net framework is 4.0. It's actually a redesign of an existing site, and everything works on the old version, and in fact the settings are the same there...
So I've got a master page for the admin section of my website which requires RSA authentication, however I want to skip that part of it obviously when I just hit f5 and run in debug on my local machine. So at the beginning of the page load event I do a check for...
If NOT ConfigurationManager.AppSettings("IsDebugMode") then
here's my code for authentication...
else
return true 'user automatically authenticated
end if
however, when I hit f5, it keeps throwing the error "Object reference not set to an instance of an object." I've googled it, and it looks like this syntax is correct, and like I said, the code is copy/pasted from the existing site, which functions the same in this area, and works just fine.
Is there a setting somewhere that I need to "turn on" this feature? I've never used the configuration manager before, so I'm not sure if it is requiring more than I've built so far. Anyone familiar with this?
Find and open web.config file, it's usually in the root directory of your web application, locate the appSettings section, add in an entry like:
<add key="IsDebugMode" value="true" />
Maybe this is a bonehead question, but I cannot figure out why this is happening.
I have to make an update to an old, classic ASP web site. One of the requests was to modify the footer so that the comments and suggestions could have the emails associated with a link changed in the administration panel.
That's not the problem, the original footer used on all pages was added as...
</div>
<!--#include file="../include/footer.htm"-->
</body>
If I add enter code here
enter code here<%#LANGUAGE="VBSCRIPT" %>
to the top of the page and change the extension to either .inc or .asp, modify the original page to:
</div>
<!--#include file="../include/footer.inc"--> (or .asp)
</body>
...I get an Error 500. I've tried using the web console in the browser, but no additional info there and there is no code on the page, only the declaration that VBScript will be used. Any help would be greatly appreciated. I'm sure this is something stupid that I knew 15 years ago, but just can't remember since I haven't touched ASP since 2002.
Parent paths are disabled by default in iis 7. This means that you'll get an error if you use "../" in an include file path
http://www.iis.net/learn/application-frameworks/running-classic-asp-applications-on-iis-7-and-iis-8/classic-asp-parent-paths-are-disabled-by-default
You could enable them in iis manager or you could use include virtual
<!--#include virtual="/root/include/footer.htm"-->
You could also use iis manager to edit how the server handles error pages, so that you can get helpful debug text rather than just a 500 internal server error page
first check IIS configuration
ERROR 500 causes by web server, google can found about this
If you set it as an .asp or .inc page then I recommend you set the content of the page up like this:
<%
'code here
%>
When you include B.asp into A.asp: also check that: B.asp not contains global variables / functions that are already declared in A.asp
IIS 7.5 , 2008rc2, classic asp, 500 error msg:
The page cannot be displayed because an internal server error has occurred.
I need to know how to configure IIS to get a more detailed error.
I've tried setting to true all of debugging options in the ASP configuration.
But that didn't work. Can anyone help me?
I have come to the same problem and fixed the same way as Alex K.
So if "Send Errors To Browser" is not working set also this:
Error Pages -> 500 -> Edit Feature Settings -> "Detailed Errors"
Also note that if the content of the error page sent back is quite short and you're using IE, IE will happily ignore the useful content sent back by the server and show you its own generic error page instead. You can turn this off in IE's options, or use a different browser.
If you're on a remote server you can configure your web.config file like so:
<configuration>
<system.webServer>
<httpErrors errorMode="Detailed" />
<asp scriptErrorSentToBrowser="true"/>
</system.webServer>
<system.web>
<customErrors mode="Off"/>
<compilation debug="true"/>
</system.web>
Double click "ASP" in the site's Home screen in IIS admin, expand "Debugging Properties", enable "Send errors to browser", and click "Apply".
Under "Error Pages" on the home screen select "500", then "Edit feature settings" and select "Detailed Errors".
Note that the same steps apply for IIS 8.0 (Windows Server 2012).
After trying Vaclav's and Alex's answer, I still had to disable "Show friendly HTTP error messages" in IE
TLDR:First determine where in the pipeline you're getting the error from (scroll looking for screenshots of something that resembles your error), make changes to get something new, repeat.
First determine what error message you are actually seeing.
If you are seeing the file located here...
%SystemDrive%\inetpub\custerr<LANGUAGE-TAG>\500.htm
...which generally looks like this:
**...then you know you are seeing the currently configured error page in IIS ** and you do NOT need to change the ASP.net customErrors setting, asp error detail setting, or "show friendly http errors" browser setting.
You may want to look at the above referenced path instead of trusting my screenshot just in case somebody changed it.
"Yes, I see the above described error..."
In this case, you are seeing the setting of <httpErrors> or in IIS Manager it's Error Pages --> Edit Feature Settings. The default for this is errorMode=DetailedLocalOnly at the server node level (as opposed to the site level) which means that while you will see this configured error page while remote, you should be able to log on locally to the server and see the full error which should look something like this:
You should have everything that you need at that point to fix the current error.
"But I don't see the detailed error even browsing on the server"
That leaves a couple of possibilities.
The browser you are using on the server is configured to use a proxy
in its connection settings so it is not being seen as "local".
You're not actually browsing to the site you think you are browsing to - this commonly happens when there's a load balancer involved. Do a ping check to see if dns gives you an IP on the server or somewhere else.
Your site's httpErrors settings is set for "Custom" only. Change it to "DetailedLocalOnly". However, if you have a configuration error, this may not work since the site level httpErrors is also a configuration item. In that case proceed to #4
The default for httpErrors for all sites is set for "Custom". In this case you need to click on the top level server node in IIS Manager (and not a particular site) and change the httpErrors settings there to DetailedLocalOnly. If this is an internal server and you're not worried about divulging sensitive information, you could also set it to "Detailed" which will allow you to see the error from clients other than the server.
You're missing a module on the server like UrlRewrite (this one bites me a lot, and it often gives the generic message regardless of the httpErrors settings).
"Logging on to the server is not an option for me"
Change your site's httpErrors to "Detailed" so you can see it remotely. But if it doesn't work your error might already be a config error, see #3 immediately above. So you might be stuck with #4 or #5 and you're going to need somebody from your server team.
"I'm not seeing the error page described above. I'm seeing something different"
If you see this...
...and you expect to see something like this...
...then you need to change "Send errors to browser" to true in IIS Manager, under Site --> IIS --> ASP --> Debugging Properties
If you see this...
or this...
...you need to disable friendly errors in your browser or use fiddler's webview to look at the actual response vs what your browser chooses to show you.
If you see this...
...then custom errors is working but you don't have a custom error page (of course at this point were talking about .net and not classic asp). You need to change your customErrors tag in your web.config to RemoteOnly to view on the server, or Off to view remotely.
If you see something that is styled like your site, then custom errors is likely On or RemoteOnly and it's displaying the custom page (Views->Shared->Error.cshtml in MVC for example). That said, it is unlikely but possible that somebody changed the pages in IIS for httpErrors so see the first section on that.
In web.config under
<system.webServer>
replace (or add) the line
<httpErrors errorMode="Detailed"></httpErrors>
with
<httpErrors existingResponse="PassThrough" errorMode="Detailed"></httpErrors>
This is because by default IIS7 intercepts HTTP status codes such as 4xx and 5xx generated by applications further up the pipeline.
Next, enable "Send Errors to Browser" under the "ASP" section, and under "Error Pages / Edit Feature Settings", select "Detailed errors".
Also, give Write permissions on the website folder to the IIS_IUSRS builtin group.
try setting the value of the "existingResponse" httpErrors attribute to "PassThrough". Mine was set at "Replace" which was causing the YSOD not to display.
<httpErrors errorMode="Detailed" existingResponse="PassThrough">
One thing nobody's mentioned is as a very quick and temporary fix, you can view the error on the localhost of that web server.
You may also verify that if you changed your main website folder (c:\inetpub\wwwroot) to another folder you must give read permission to the IIS_IUSRS group in the new folder.
Fot people who have tried EVERYTHING and just CANNOT get the error details to show, like me, it's a good idea to check the different levels of configuration. I have a config file on Website level and on Application level (inside the website) check both. Also, as it turned out, I had Detailed Errors disabled on the highest node in IIS (just underneath Start Page, it has the name that is the same as the webservers computername). Check the Error Pages there.
Found it.
http://blogs.iis.net/ksingla/archive/2009/02/16/iis-7-5-updates-to-custom-errors-and-compression.aspx
run cmd as administrator, go to your system32\inetsrv folder and execute:
appcmd.exe set config -section:system.webServer/httpErrors -allowAbsolutePathsWhenDelegated:true
Now I can see detailed asp errors .
If you run the browser in the server and test your url of the project with the local ip you have received all errors of that project without a generally error page(for example 500 error page).
In my case it was permission issue.
Open application folder properties -> Security tab -> Edit -> Add
IIS AppPool\[DefaultAppPool or any other apppool] (if use ApplicationPoolIdentity option)
IUSRS
IIS_IUSRS
Double check the encoding of the asp file you are testing.
For instance if you created a file like below on a Windows Server Core 2019 :
echo "<%# LANGUAGE=Javascript %>" > test.asp
echo "<%Response.Write("test");%>" >> test.asp
Then test.asp will be encoded in Unicode, and requesting it will produce a 500 without any details.
Do a notepad test.asp, then click on "Save As..." and choose "ANSI" encoding to fix it.
Request.RawUrl always returns the /default.aspx variant. I did not find any way at all to differentiate between these urls. Does anybody know how to do that?
Environment is .NET 3.5SP1 on IIS 7.
I actually had to combat this same problem when designing my URL Rewriter. It has to do with the processes that occur before you can even access the URL's. To get around this you have to make sure that in IIS 7 the default page handling is turned off. Because if there is no default page handling it is not going to go through the extra step of trying to map it to the drive, so you will be the exact URL requested. But this may or may not be an option depending on if you are using System.Web.Routing or not.
To turn off the default page handling you need to do the following:
Go to your site in IIS
Go to Default Document
Click Disable in the top right corner.
Or you can add the following to your web.config:
<system.webServer>
<!-- ... other tags here ... -->
<defaultDocument enabled="false" />
</system.webServer>
After you do this the default document will be no longer added to your URL. However be warned that since this is no longer active you cannot rely on default.aspx actually mapping to your directories, you will have to handle this manually or use something like System.Web.Routing to handle this functionality.
To accomplish the same in IIS 6 you need to turn on wildcards:
The following instructions apply for IIS 6.
Open IIS and right-click on the website and select 'properties'.
Click the 'Configuration' button under Application Settings section
Click the 'Insert...' button to create a new wildcard mapping
Set the executable textbox to aspnet_isapi.dll file location.
for .net 2.0, 3.0, 3.5: C:\Windows\Microsoft.NET\Framework\v2.0.50727\aspnet_isapi.dll
Make sure the checkbox 'Verify that file exists' is not checked.
Press 'OK' to confirm and close all the windows.
NOTE: by the way all the source is available on the site I linked above incase you were curious how I was doing things.