I've internal Asp.Net Core Site running on IIS10 in my company.
Now i thought its a good idea to access pdf files from another server via a virtual directory. (Maybe someone has another idea)
We have 1 Server with Active Directory User, the File Server and the Server where IIS is running.
I tried absolut everything with permissions, at the end nearly everything had Admin Access but IIS still keeps meaning it has not enough permissions.
(Maybe i missed a restart at some point, i dont know)
I read much about the iis_iusrs the active directory has no user only a group where i added the iis user.
Other way giving the folder iisServer\iis_iusrs permissions isnt accepted
I've this error:
https://learn.microsoft.com/en-us/troubleshoot/iis/http-error-500-19-webpage
I read that its not the web.config but tried also many permission options.
At the end i'm pretty confused, didnt think that its so complicated or maybe i'm doing everything wrong
Maybe someone knows a way for dummys which always work.
You can try this way to slove the question:
Open the Internet Information Services.
Expand the root node, expand Sites, and right-click on your Application, click Manage Web Site ->Advanced Settings.
Note down the Application Pool name under General settings and close the window.
Now go to Application Pools section, here you can see what Identity is used in the corresponding Application Pool.
Here, the user account testuser1 is configured in Application Pool. So we need give required permissions for this user in the website directory.
Go the abother web directory folder, right-click on the folder and click Properties.
Set required permissions for the Identity(testuser1) that used in ApplicationPool.
Restart Application Pool and Web Application and try again.
I have a .NET 3.5 application running under IIS 7 on Windows 2003 server and cannot get integrated windows authentication working properly as I continue to get prompted for a login. I have set Windows Authentication to enabled in IIS with all other security types disabled and my application web.config file authentication/authorization is set up as:
<system.web>
<compilation debug="true" strict="false" explicit="true" targetFramework="3.5" />
<authenticationmode="Windows"/>
<authorization>
<deny users = "?" />
</authorization>
</system.web>
With this setup, I'm expecting behind the scene verification of the Windows user to allow access and deny anonymous users. However, what I'm getting is a Windows login pop-up when I try to access the site.
I have been troubleshooting this issue for a few days now and cannot figure out the problem. Based on posts with similar problems, I confirmed my URL does not include any periods, double checked that my IE settings are set to Enable Integrated Windows Authentication, and also added my URL to my intranet sites, but still getting the pop-up.
To troubleshoot it further, I enabled Anonymous Authentication in IIS and modified my web.config file to which lets me right in and then added Response.Write(System.Security.Principal.WindowsIdentifity.getcurrent().user.name.toString()) to try to see what user is being used in the authentication. The result I'm getting is IIS APPPOOL\myapp which is obviously the IIS application pool for my application.
I really appreciate any help anyone can provide so that I'm still using only windows authentication but don't get the pop-up and the windows authentication is performed against the actual Windows user.
Thanks.
Additional note after troubleshooting further:
Just noticed that when the login fails and the Windows login prompt displays again, it is showing the username that attempted to login as "SERVERNAME"\"USERNAME" which led me to believe it was trying to validate the user against the server vs. the domain. To confirm this, I created a local user account directly on the app server with the same username and password as the network domain user and tried to login again. The result was that I received the login prompt again but when I entered the username and password this time, I was able to successfully login. The network user and app server are on the same domain so really not sure why IIS authentication is pointing to the local app server accounts and not to the domain accounts. I realize this is an IIS question at this point so posting on forums.iis.net as well but appreciate any advice anyone may have since have been troubleshooting this for days.
I have a Windows 2008 server that I'm working on, so my answer is not completely the same as what the OP has on a Windows 2003 server.
Here is what I did (recording this here so I can find it later).
I was having this same issue:
In my Web.config file, I had this section:
<system.web>
<authentication mode="Windows" />
<authorization>
<allow users="*" />
<deny users="?" />
</authorization>
</system.web>
Under IIS, all of these seems to be solved under the Authentication icon.
Edit Permissions: Make sure your ASP.NET account has permission. Mine was not originally added.
Now go into the features of Authentication:
Enable Anonymous Authentication with the IUSR:
Enable Windows Authentication, then Right-Click to set the Providers.
NTLM needs to be FIRST!
Next, check that under Advanced Settings... the Extended Protection is Accept and Enable Kernel-mode authentication is CHECKED:
Once I did this, I went back to my web application, clicked the Browse link, and logged in without having to provide my credentials again.
I hope this proves beneficial to many of you, and I hope it is useful for me later as well.
Just for other people's benefit. If the error is a 401.1 Unauthorized and your error code matches 0xc000006d, then you're actually running into to a security "feature" that blocks requests to FQDN or custom host headers that don't match your local machine name:
Follow this support article to fix the issue:
https://webconnection.west-wind.com/docs/_4gi0ql5jb.htm (original, now defunct: http://support.microsoft.com/kb/896861)
From the support article, to ensure it doesn't get lost:
The work around is a registry hack that disables this policy
explicitly.
To perform this
configuration manually find this key in the registry on the server:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
and edit or add a new key:
DisableLoopbackCheck (DWORD)
then sent the value to 1 to disable the loopback check (local
authentication works), or to 0 (local authentication is not allowed).
Or more easily you can use Powershell:
New-ItemProperty HKLM:\System\CurrentControlSet\Control\Lsa -Name
"DisableLoopbackCheck" -Value "1" -PropertyType dword
It looks like
recent builds of Windows 10 (1803 and later?) also require this
configuration setting in order to authenticate locally.
This one took me awhile because everyone else's comments here failed to help me. I found this article and it fixed it!
I had a similar issue whereby I wanted to protect only a certain part of my website. Everything worked well except in IE. I have both Anonymous and Windows Authentication enabled.
For Anonymous, the Identity is set to the Application Pool identity. The problem was with the Windows Authentication. After some digging around I fired up fiddler and found that it was using Kerberos as the provider (actually it is set to Negotiate by default). I switched it to NTLM and that fixed it.
HTH
Daudi
Add permission [Domain Users] to your web security.
Right click on your site in IIS under the Sites folder
Click Edit Permissions...
Select the Security tab
Under the Group or usernames section click the Edit... button
In the Permissions pop up, under the Group or user names click Add...
Enter [Domain Users] in the object names to select text area and click OK to apply the change
Click OK to close the Permissions pop up
Click OK to close the Properties pop up and apply your new settings
If your URL has dots in the domain name, IE will treat it like it's an internet address and not local. You have at least two options:
Get an alias to use in the URL to replace server.domain. For example, myapp.
Follow the steps below on your computer.
Go to the site and cancel the login dialog. Let this happen:
In IE’s settings:
Don't create mistakes on your server by changing everything. If you have windows prompt to logon when using Windows Authentication on 2008 R2, just go to Providers and move UP NTLM for each your application.
When Negotiate is first one in the list, Windows Authentication can stop to work property for specific application on 2008 R2 and you can be prompted to enter username and password than never work. That sometime happens when you made an update of your application. Just be sure than NTLM is first on the list and you will never see this problem again.
This fixed it for me.
My Server and Client Pc is Windows 7 and are in same domain
in iis7.5-enable the windows authentication for your Intranet(disable all other authentication.. also No need mention windows authentication in web.config file
then go to the Client PC .. IE8 or 9- Tools-internet Options-Security-Local Intranet-Sites-advanced-Add your site(take off the "require server verfi..." ticketmark..no need
IE8 or 9- Tools-internet Options-Security-Local Intranet-Custom level-userauthentication-logon-select automatic logon with current username and password
save this settings..you are done.. No more prompting for username and password.
Make sure , since your client pc is part of domain, you have to have a GPO for this settings,.. orelse this setting will revert back when user login into windows next time
WindowsIdentity.GetCurrent is correct: you should get the APPPOOL user. This is because the ASP.NET process, which is executing your code, is the current identity. If you want it to return the user hitting the site's identity, you'll need to add the following line in your web.config:
<identity impersonate="true" />
This causes the process to assume the identity of the user requesting the page. All actions will be performed on their behalf, so any attempts to read folders on the network or access database resources and the like will mean the current user will need permissions to those things. You can read more about impersonation here. Note that depending on how your web/database server topology is set up, you may run into delegation issues with impersonation turned on.
But your original issue is that it appears the identity cannot be determined and you're getting a login popup. I'll note that you do not need the <deny> block if you have disabled anonymous authentication in IIS. We never include it (except in special <location> blocks and such) so I would say you might try removing it and trying again. Everything else sounds right, though.
You didn't specify what user is running the application pool in IIS. Is it a custom account or is it the default one? If it is custom, is it a domain account or a local account on the web server? Custom accounts can sometimes require a few more steps, such as registering a SPN. Also, it may be a problem with the custom account not having permission in AD for resolving the incoming user's account.
You might also check the IIS logs to see what response is being returned. It'll most likely be a 401, but it should have a sub number after it like 401.2 or something. That sub-number can sometimes help determine the root problem. This KB article lists five.
Can be browser related. If you are using IE, you can go to Advanced Settings and check you the "Enable Windows Integrated Authentication" checkbox is checked.
In my case the authorization settings were not set up properly.
I had to
open the .NET Authorization Rules in IIS Manager
and remove the Deny Rule
In our Intranet the issue was solved on the client side by tweaking settings in security as shown here. Either of the check boxes on the right worked for us.
I just solved a similar problem with an ASP.Net application.
Symptoms:
I could log in to my app using a local user, but not a domain user, even if the machine was correctly joined to the domain (as you say in your Additional Note). In the Security event viewer, there was an event with ID=4625 "Domain sid inconsistent".
Solution:
I found the solution here. The problem was that my test machines where cloned virtual machines (Windows Server 2008 R2; one Domain Controller, and one web server). Both had the same machine SID, which apparently caused problems. Here is what I did:
Remove the web server from the domain.
Run c:\Windows\System32\Sysprep\Sysprep.exe in the VM.
Reboot the VM.
Join the web server to the domain.
You loose some settings in the process (user preferences, static IP, recreate the self-signed certificate), but now that I have recreated them, everything is working correctly.
I also had the same issue. Tried most of the things found on this and other forums.
Finally was successful after doing a little own RnD.
I went into IIS Settings and then into my website permission options added my Organizations Domain User Group.
Now as all my domain user have been granted the access to that website i did not encounter that issue.
Hope this helps
I tried the above IIS configuration tricks and loopback registry hack, and I reviewed and recreated app pool permissions and a dozen other things and still wasn't able to get rid of the authentication loop running on my development workstation with IIS Express or IIS 7.5, from a local or remote browsing session. I received four 401.2 status responses and a blank page. The exact same site deployed to my IIS 8.5 staging server works flawlessly.
Finally I noticed markup in the Response Body that was rendered blank by the browser contained the default page for a successful log in. I determined that Custom Error handling for ASP.NET and HTTP for the 401 error was preventing/interfering with Windows Authentication my workstation but not the staging server. I spent several hours fiddling with this, but as soon as I removed custom handling for just the 401 error, the workstation was back to normal. I present this as yet one another way to shoot your own foot.
I was having this issue on .net core 2 and after going through most suggestions from here it seems that we missed a setting on web.config
<aspNetCore processPath="dotnet" arguments=".\app.dll" forwardWindowsAuthToken="false" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" />
The correct setting was forwardWindowsAuthToken="true" that seems obvious now but when there are so many situations for same problem it's harder to pinpoint
Edit: i also found helpful the following Msdn article that goes through troubleshooting the issue.
Have you tried logging in with your domain prefix, e.g. DOMAIN\Username? IIS 6 defaults to using the host computer as the default domain so specifying the domain at logon may solve the problem.
add to registry
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa solved my problem.
Create the Local Security Authority host names that can be referenced in a NTLM authentication request.
To do this, follow these steps for all the nodes on the client computer:
Click Start, click Run, type regedit, and then click OK.
Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0
Right-click MSV1_0, point to New, and then click Multi-String Value.
In the Name column, type BackConnectionHostNames, and then press
ENTER.
Right-click BackConnectionHostNames, and then click Modify.
In the Value data box, type the CNAME or the DNS alias, that is used
for the local shares on the computer, and then click OK.
Note
Type each host name on a separate line. If the
BackConnectionHostNames registry entry exists as a REG_DWORD type,
you have to delete the BackConnectionHostNames registry entry. Exit
Registry Editor, and then restart the computer.
Source: Error message when you try to access a server locally by using its FQDN or its CNAME alias after you install Windows Server 2003 Service Pack 1: Access denied or No network provider accepted the given network path
For what it's worth, I did not need to restart after making the change on Windows Server 2019.
Windows authentication in IIS7.0 or IIS7.5 does not work with kerberos (provider=Negotiate)
when the application pool identity is ApplicationPoolIdentity
One has to use Network Service or another build-in account.
Another possibility is to use NTLM to get Windows Authenticatio to work (in Windows Authentication, Providers, put NTLM on top or remove negotiate)
chris van de vijver
I had the same problem cause the user (Identity) that I used in the application pool was not belowing to IIS_IUSRS group. Added the user to the group and everything work
In my case the solution was (on top of adjustments suggested above) to restart my/users' local development computer / IIS (hosting server).
My user has just been added to the newly created AD security group - and policy didn't apply to user AD account until I logged out/restarted my computer.
Hope this will help someone.
I encountered the same credential prompting issue, and did a quick search and nothing on the internet would fix it. It took some time to find the problem, a silly one.
In IIS -> Advance Setting -> Physical Path Credential (is empty)
As soon as i added a machine ID (domain/user) that has access to the VM/server, the password prompting would stop.
Hope this helps
I got the same issue and it was resolved by changing the Application pool identity of the application pool under which the web application is running to NetworkService
I have created a simple WebForm asp.net web site. I have disabled the Windows Authentication checks within the code but set IIS8 to "Windows Authentication" as well as the web.config. I perform the Indentity.IsAuthenticated check in the backend to ensure the user is authenticated.
My issue is I get "The page cannot be displayed, please check your URL is correct". (This is in IE)
If I set my authentication to Anonymous the site works fine. I disable Anonymous Authentication and enable Windows Authentication only and receive this error. I have done quite abit of reading now and think I am just missing something small.
I used the IIS "default site" and set it to Windows Authentication and got a login prompt (as expected).
The server is running IIS8, windows 2012. Windows Authentication is installed as a feature, IIS site settings is set to use Windows Authentication only, as is the web.config. The web.config doesn't have Authorization tags for deny and allow but has <authentication mode="Windows" />. The errors occur on both IE and FireFox. No windows events are logged so i assume it's purely a authentication error that isn't displaying the site. The AppPool is set to Identity.
I think what confuses me most is the "default site" (with no code or logic) works and my site doesn't. The default site also doesn't have a web.config.
Any ideas would be grateful.
The issue may have to do with Kereberos.
I had the same issue and whilst troubleshooting server side issues, my co worker indicated that he was able to access the site.
It was then I realized my issue was a client side issue. Something may have been wrong with my Kerberos tickets. Maybe the domain controller that initially issued the ticket to me went offline. Rebooting my workstation was what got windows authentication working for me again.
Some other things you can try are:
Try changing your windows authentication provider to NTLM as a test.
Click on the site -> Click Authentication -> Click Windows Authentication -> Click Providers
Move NTLM to the top or add it if it isn't there.
Click ok.
IISReset. And try again.
If you prefer to use Kerberos, you may have to set the service principal names using the setspn.exe command.
For more information on Kerberos
https://blogs.msdn.microsoft.com/chiranth/2014/04/17/setting-up-kerberos-authentication-for-a-website-in-iis/
Other things to check:
- Check your authorization rules and .NET Authorization Rules to ensure All Users are allowed to access the site.
Look in your IIS logs located at C:\inetpub\logs for more clues. In the folder, you'll find a folder for each site named after the site's id. You can find the site id clicking Sites on the IIS Management console. The site ids of each site will be displayed there.
Verify the application pool identity of the site has enough permissions.
I was wondering what privileges I needed to let a user start a service on our server.
The situation is as follows, some people on our website can start a certain service on the server (Windows 2008 and IIS7). The way that worked so far with me was specifying the application pool I created with my user account (the impersonate method from msdn doens't work for some reason). Now however I want to change that user account to a user account who only has the priviliges to start and stop a service (and everything that is needed to get him to do that).
The website is written in ASP.NET and C#. I use the ServiceController to start and stop my services.
Which privileges should I assign to that user?
EDIT: I just want to clear some things up here. I managed to get this thing working through the Application pool (although it doesn't work through debugger). But it only works with a user that is part of the Administrators group which isn't what I want. I want to specify a special user that will only be able to start and stop the service through the website. So what privileges do I need? Please be specific.
EDIT 2: I found out why my service wouldn't start in the debugger. I didn't run Visual Studio with administrator rights. I feel so stupid right now.. Anyway the question still stands as I still need my special user with the correct permissions.
Any comment will be appreciated!
Kind regards,
Floris Devriendt
You have to set identity impersonate to true in your web.config and if you are using windows authentication then need to set that up in IIS. if you are using a WCF service in between you may have to look at Impersonation in WCF.
(Terminology gripe) - you shouldn't be looking at privileges, since those apply across a machine as a whole. You should be looking at permissions.
There's an answer here about allowing remote users to start and stop a service. You may need to run the same steps to allow the account your website is under the specific permissions, that is:
Copy the IA users permissions on the scmanager, to allow a non-interactive user to access the service controller, and
Add appropriate permissions for your user against the specific service.
Both of these actions use the sc command line tool. Hopefully, you can crib enough together for your specific circumstances. Something like:
sc sdset scmanager D:(A;;CC;;;AU)(A;;CCLCRPRC;;;IU)(A;;CCLCRPRC;;;SU)(A;;CCLCRPWPRC;;;SY)(A;;KA;;;BA)(A;;CCLCRPRC;;;S-1-5-3-3127463467463)S:(AU;FA;KA;;;WD)(AU;OIIOFA;GA;;;WD)
where S-1-5-3-3127463467463 is the SID for the website account, and:
sc sdset Alerter D:(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPLOCRRC;;;PU)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCLCSWLOCRRCWPRP;;;S-1-5-3-3127463467463)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
whwere Alerter is the name of the specific service, and S-1-5-3-3127463467463 is again the SID for the website account.
(Not sure whether to break up these commands to make them more readable on SO - they need to have no line-breaks when running in the command line)
you have to give the right for strating your service to the user that you are using for the application pool.
Click Start, point to Settings, click Control Panel, and then double-click Administrative Tools.
Double-click Services
On the Log On tab, click Local System Account, and then click Apply.
On the General tab, click Start to restart the service.
Quit the Services tool.
I have created a sample ASP.NET website and hosted it in IIS 6.0 . It is working fine , if the identity of the defalut app pool is "local system". But when i changed the identity with some other configurable user id then it is showing as "Service Unavailable".
The following message is found in the event viewver.
"The identity of application pool 'DefaultAppPool' is invalid, so the World Wide Web Publishing Service can not create a worker process to serve the application pool. Therefore, the application pool has been disabled."
Either the credentials provided for the user is not valid, or the user does not have the needed permissions.
I believe there is a security group on the machine called IIS_WPG that is created when Asp.net is installed, add the user to this group, it should give them the needed permissions.
Message is self-explanatory. The selected user id isn't valid - probably due to insufficient privaledges to run the service.
The user identity you use needs to have fairly significant rights to operate. At a minimum the user needs to have read/execute permission on the root directory of the folder. This user should also have read/write/execute permission on the Temporary Asp.Net Files folder located within the %SystemRoot%/Microsoft.Net/Framework/ folder.
FYI,
In a development environment you can use the default app pool to create your web applications.
In production environment you want to use lusrmgr.msc (Server 2008/R2/7 Ultimate and Pro) to create new users (and their credentials) on the machine and assign the users to the right group (IIS_IUSRS).
Also once you have created the user, you will want to give it access to your data source back-end (if sql is running on the same machine and using windows authentication to access SQL).
Check Application Pools which assign Site on IIS, probably it is stopped.