I am trying to save an image file in a custom module I am building for a DNN site.
However when I run the code I get an UnauthorizedAccessException.
if(upLoadAddImg.HasFile)
{
String imageLocation = ConfigurationManager.AppSettings["ImageFolderPath"];
//Upload file
upLoadAddImg.SaveAs(Server.MapPath(imageLocation));
}
I am running on localhost using the internal visual studio server. Tthe folderpath is all right and I have made sure Network Service has full permissions.
Am I missing something obvious or does DNN have some special permission setting I am missing?
If you are using the dev server in VS its identity is not Network Service by default. Most likely the directory you are saving to loccally is not allowed for the aspnet user - if you run this on a web site it should work at least code wise -------
To test it you can do one of two things make the portal directory open to everyone or set up a local site not run on the dev server ----
Related
When I try to publish it I get the following error message:
Error 1 Web deployment task failed. (Could not connect to the remote computer ("..*.*"). On the remote computer, make sure that Web Deploy is installed and that the required process ("Web Management Service") is started. Learn more at: http://go.microsoft.com/fwlink/?LinkId=221672#ERROR_DESTINATION_NOT_REACHABLE.)
I dont understand why is it referring me to a remote computer, I've specified the destination URL as my own IP address. And I have web management service checked on windows features.
How do I solve this particular error?
Try to publish to the file system, if this works move the files into you wwwroot, normally c:\inetpub\www.
then go to start and run inetmgr to open iis configuration manager, if you see your folder there right click and convert to application, accept settings then right click / manage / browse and you should see your site or an IIS error that should be easy to debug.
I never use the deploy to IIS feature from VS as it's pants.
Good luck!
BLUF
Our application is attempting to write a file to a UNC folder using an ASP.NET web service running under .NET 4.5, IIS 7.5, and Windows Server 2008 R2. However, any attempt to write the file to the desired location results in an access denied exception.
The task seems simple however me and my team have been troubleshooting this for a while now and we are stumped as to what may be causing the error. Below are the details of our setup and what we have tried and found so far. Names have been changed to protect the innocent.
Environment Setup
The web server, mywebserver, has a website named My.Site.Com with a corresponding application pool named My.Site.Com. The application pool is configured as shown below.
.NET Framework Version : v4.0
Enable 32-bit Applications : False
Managed Pipeline Mode : Integrated
Name : My.Site.Com
Identity : ApplicationPoolIdentity
Load User Profile : False
The UNC path we are attempting to write to is \myotherserver\mydirectories\output where mydirectories is the actual share. On this share a domain group named mygroup-www has been granted full permissions to the share and all subfolders. The machine account (i.e., mywebserver) is a member of this mygroup-www group.
NOTE: For the moment, this UNC path actually lives on the same
machine, mywebserver. However, this will eventually be moved to a machine other
than mywebserver in our test environment and in the production environment
when that it is ready. Currently, I only have the one test environment to troubleshoot with.
The error can be replicated by executing the following code.
[WebMethod]
[ScriptMethod(UseHttpGet = false, ResponseFormat = ResponseFormat.Json)]
public string ExportReport(int reportId)
{
try
{
string output = ConfigHelper.OutputPath + "test.html"; // UNC path
string url = ConfigHelper.VirtualPath + "test.html";
string[] lines = { "Hello", "World!" };
File.WriteAllLines(output, lines); // Access Denied!
return url;
}
catch (System.Exception ex)
{
Logger.ErrorException("Error exporting report", ex);
throw;
}
}
Troubleshooting
Failed Attempts
We tried various combinations of group/user permissions on the folders (listed below). When running these tests we also ran Process Monitor. For each configuration we saw the same result. The w3wp.exe process attempted to create the file in the desired location but reported a result of ACCESS DENIED. The user of each configuration was IIS APPPOOL\My.Site.Com as expected.
Granting mydomain\mymachine$ full permissions to \myotherserver\mydirectories
Granting mydomain\mymachine$ full permissions to \myotherserver\mydirectories\output
NOTE: I have also tried modifying the code so that it would read a
simple file from \myotherserver\mydirectories\output. When
attempting to read the file, the process fails with an ACCESS DENIED
message as it did when writing the file.
Successful Attempts
We also tried several configurations that worked.
Grant the local IIS APPPOOL\My.Site.Com permissions
The first configuration to work was to grant the IIS APPPOOL\My.Site.Com full permissions to \myotherserver\mydirectories The file was successfully written however the process's user was quite unexpectedly a domain account that was set up for a web application on the same machine in another website. This remains very confusing but worked as the 'other' account also has write permissions to the share.
This won't work in production as we cannot use local accounts to grant access to networked resources but is an interesting data point nonetheless.
Change the App Pool Identity to Domain User
The second configuration that worked was to change the My.Site.Com application pool's identify to domain account that had full permissions to \myotherserver\mydirectories. This was a 'vanilla' domain account that was manually created by us. We did not capture what the user of the process was but that may be another useful data point.
This option may be possible, however it breaks away from best practices with IIS 7.5 and may not be allowed in our production environment due to fairly stringent IT policies.
Run the Site On My Development Machine
The third test was to run the site locally on my development machine, mydevmachine. My local IIS configuration is identical to mywebserver with the exception that I am running Windows 7 instead of Windows Server 2008. I granted full permissions for mydomain\mydevmachine to the \myotherserver\mydirectories and ran the application. The file was successfully written. According to Process Monitor the user for the process was correctly set to IIS APPPOOL\My.Site.Com.
Conclusion
We would like to enable write access as designed using the machine account of mywebserver. We have read ApplicationPoolIdentity user cannot modify files in shared folder in Windows Server 2008 and Permissions for Shared Folder for IIS 7 Application Pool Identity Across Domain and Application Pool Identities.
According to this information we should be able use the machine account to grant read and write access to networked resources such as the UNC path. In fact, I can do this in the desired manner when running the web site from my development machine.
There are a couple thoughts that come to mind. Perhaps there is something wrong with the machine account of the test web server. Or perhaps that 'other' software is interfering with the process somehow.
Any thoughts as to what may be causing this issue? What else should we do to troubleshoot?
Reboot your 'mywebserver'.
Marvel at the now mysteriously functional ApplicationPoolIdentity.
Install MS HotFix KB2545850 and learn the details about this bug in KB2672809 which also shows the steps to reproduce and demonstrate this apparently random problem. Direct download link here.
Speculate why Microsoft has not managed to release a normal windows update for this in the 3 years since that hotfix was published. While people still continue running into it and pulling their hair out because of this obscure problem.
Learn about the other folks who have shared and enjoyed this gift from MS that still continues to keep on giving:
IIS application using application pool identity loses primary token?
DirectoryServicesCOMException 80072020 From IIS 7.5 Site Running Under ApplicationPoolIdentity
ApplicationPoolIdentity cannot access network resources
ApplicationPoolIdentity IIS 7.5 to SQL Server 2008 R2 not working
Windows Authentication Failed when using application pool identity
IIS 7.5 stops using machine account to connect to network resource when using AppPoolIdentity
Your Windows 7 dev machine probably worked fine because it reboots more often than the server. Congrats on your very well written and thorough bug report. I rarely see that here.
I had similar problem accessing a network share using AppPoolIdentity in an ASP.NET application (access denied).
Using NetworkService account or other domain account worked but these were not the best solution.
I performed almost all the tests you did but finally found something that worked.
I figured out that the Network Service account was not used when accessing the shares, just like you did (i expected domain\machine$ account)
This worked for us:
On your IIS web site, go to Authentication and change the Anonymous Authentication item to "Application Pool Identity". It's by default set to "IUSR". This solved our problem.
Also maybe activating ASP.NET impersonation (still in Authentication menu) may help.
Thibault
I have faced same issue, I resolved by creating one domain account for each environemt (QA, STAGE, PRODUCTION). In Application pool identity I have set custom account and I used domain user for respective account. Now It gives me the ability to write and read the files from UNC Path.
trying to save file using Powerbuilder Datawindow Save As function
for path we are using
RegistryGet( "HKEY_CURRENT_USER\Software\Microsoft\windows\currentversion\explorer\shell folders", "Desktop", RegString!, ls_ret)
but when we login through citrix.
Not able to get this path.
When looged in as administrator getting this path but for other users we are not getting the path .
We also given full permission to particularly this registry but still not getting.
This does not seem to be Citrix specific, to simplify, add a user to Remote Desktop group and login directly via RDP (without Citrix), you should get the same behavior
i want to create two batch file one will deploy wcf service in IIS and also create virtual director and run it as a result any client can consume it. there will be another service which will stop the service and also remove the virtual directory.
i search google and found some script but no working
the below script will create virtual director and run the site
%windir%\system32\inetsrv\appcmd.exe set site "Default Web Site" -+bindings.[protocol='net.tcp',bindingInformation='808:*']
%windir%\system32\inetsrv\appcmd.exe add app /site.name:"Default Web Site" /path:/servicemodelsamples /physicalPath:C:\inetpub\wwwroot\servicemodelsamples
%windir%\system32\inetsrv\appcmd.exe set app "Default Web Site/servicemodelsamples" /enabledProtocols:http,net.tcp
pause
the below script will stop the site & remove virtual director
%windir%\system32\inetsrv\appcmd.exe set app "Default Web Site/servicemodelsamples" /enabledProtocols:http
%windir%\system32\inetsrv\appcmd.exe delete app /app.name:"Default Web Site/servicemodelsamples"
%windir%\system32\inetsrv\appcmd.exe set site "Default Web Site" --bindings.[protocol='net.tcp',bindingInformation='808:*']
i never use batch file but i like the batch file approach. so anyone tell the above script is ok or not because when i am running the first one then i am getting error : do not have permission to read the config file
here is my screen shot of batch file window with error
if possible give me any easy script for deploy wcf service to iis. thanks
If you are not able to read a config file, try opening the file as Administrator (I'm assuming you're on windows because it is a batch file.), and it will give the batch file Administrative access. (Beware if you downloaded this off the interwebs)
And, as a friendly reminder, please try to use good grammar and spelling.
Thanks,
Javaboy
Mainly looking to answer my question #1 below, but more knowledge would be appreciated.
I tried to use these resources during my investigation, but was unsuccessful:
http://social.msdn.microsoft.com/Forums/en/sqldatabaseengine/thread/f5eb164d-9774-4864-ae05-cac99740949b (For this error: Failed to generate a user instance of SQL Server due to failure in retrieving the user's local application data path. Please make sure the user has a local user profile on the computer. The connection will be closed.)
http://social.msdn.microsoft.com/forums/en-US/sqlexpress/thread/6dfdcc22-7a81-4e8f-a947-c1ce6982d4b3/ (For this error: CREATE DATABASE permission denied in database master. An attempt to attach an auto-named database for file ? failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.)
Questions
1.) Why does this error occur while running the Telerik Rad Controls for ASP.NET AJAX "Live Demos" project with IIS 7 (Running Telerik Live Demos works fine using ASP.NET Development Server with this connection string)
Failed to generate a user instance of SQL Server due to failure in retrieving the user's local application data path. Please make sure the user has a local user profile on the computer. The connection will be closed.
2.) How is creating a SQL Server Express instances different in IIS 7, from ASP.NET Development Server & SSMSE
3.) Are there certain attributes of a SQL connection string not allowed when running a website on different contexts (based on #2).
Environment:
I'm not running the "Live Demos" .NET 3.5 ASP.NET web application via the ASP.NET Development Server (feature that pops up in your system tray and picks a port for you after clicking play in Visual Studio). That works just fine! I'm running the website on IIS 7. SQL Server Express is using the NETWORK SERVICE user in Control Panel > Administrative Tools > Services > SQL Server (SQLExpress).
Using this connection string provided with the installed "Live Demos" web application demo project:
<add name="NorthwindConnectionString"
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|Northwind.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
I've tried setting "User Instance=False", but that just throws another error:
CREATE DATABASE permission denied in database master. An attempt to attach an auto-named database for file ? failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
(where "?" is the path of the *.mdf file - C:\Users\\MyDocuments\Visual Studio 2008\Projects\TelerikDemos\Telerik\RadControls for ASP.NET AJAX Q2 2011\Live Demos\App_Data\Northwind.mdf .. Stack Overflow italics is broken with some of those characters, so I had to remove that path)
Someone answered me on a previous question to set this "User Instance=False", but it appears User instances have nothing to do with whether or not you use SQL Express. User Instances are simply a feature of SQL Express that allows a very unprivileged user to host a database instance in it's own user context.
Note, this Northwind database is stored in an *.mdf file in the App_Data folder (under the "Live Demos" root application directory) along with the *.ldf (log file). I did previously try attaching the *.mdf files as actual databases under the "Databases" folder (in the SSMSE Object Explorer tree), but later removed them.
Web application "Live Demos" root folder (and nested folders/files) have the following users assigned with ALL privileges:
- IIS APPPOOL\Telerik ("Telerik" is the name of my application pool in IIS 7 for this site)
- IUSR
- NETWORK SERVICE
Making a note for myself about this SQLExpress master database query:
SELECT * FROM sys.dm_os_child_instances
Also tried different combinations of *.mdf & *.ldf permissions while also changing the user on the SQL Server (SQLExpress) Windows 7 service (Control Panel > Administrative Tools > Services) .. and also restarted the service after making those changes.
To reproduce:
download the Telerik Rad Controls for ASP.NET AJAX. Set the permimssions I mentioned in the "Live Demos" folder under Program Files\Telerik, change the .NET version of the web application to .NET 3.5, switch out their 3.5 web.config file with the normal web.config file in that folder. You have to use Visual Studio 2010, but I am running this in Visual Studio 2008 (with a little grunt work I did because our company is not yet on VS2010). Also switch out the proper Bin35 assemblies into the "Live Demos" folder Bin folder. Compile the solution. Create an IIS 7 website. Add Windows authentication. Enabled anonymous and Windows authentication.. all others are disabled. Set application pool to use Classic and 32 bit.
Then navigating to this URL and clicking the "First Look" image.
http://localhost/combobox/examples/overview/defaultcs.aspx
====================
More evidence will be provided if requested.
You are using a connection string with trusted authentication = true. This means that the connection uses the security context of the calling process.
When you run with the development server you are running in the security context of the logged in user, so every thing works fine.
When you run in IIS you are in the security context of the application pool process, which is NETWORK SERVICE, which does not have a user profile, therefore it crashes.
You can fix it by either:
Change the identity of the application pool to a normal user with access to the database
Use a connection string with user name and password
IIS doesn't load the Windows user profile, but certain applications might take advantage of it anyway to store temporary data. SQL Express is an example of an application that does this. However, a user profile has to be created to store temporary data in either the profile directory or in the registry hive. The user profile for the Network Service account was created by the system and was always available. However, with the switch to unique Application Pool identities, no user profile is created by the system. Only the standard application pools (DefaultAppPool and Classic .NET AppPool) have user profiles on disk. No user profile is created if the Administrator creates a new application pool.
However, if you want, you can configure IIS application pools to load the user profile by setting the LoadUserProfile attribute to "true".
https://learn.microsoft.com/en-us/iis/manage/configuring-security/application-pool-identities