Suppose some Windows service uses code that wants mapped network drives and no UNC paths. How can I make the drive mapping available to the service's session when the service is started? Logging in as the service user and creating a persistent mapping will not establish the mapping in the context of the actual service.
Use this at your own risk. (I have tested it on XP and Server 2008 x64 R2)
For this hack you will need SysinternalsSuite by Mark Russinovich:
Step one:
Open an elevated cmd.exe prompt (Run as administrator)
Step two:
Elevate again to root using PSExec.exe:
Navigate to the folder containing SysinternalsSuite and execute the following command
psexec -i -s cmd.exe
you are now inside of a prompt that is nt authority\system and you can prove this by typing whoami. The -i is needed because drive mappings need to interact with the user
Step Three:
Create the persistent mapped drive as the SYSTEM account with the following command
net use z: \\servername\sharedfolder /persistent:yes
It's that easy!
WARNING: You can only remove this mapping the same way you created it, from the SYSTEM account. If you need to remove it, follow steps 1 and 2 but change the command on step 3 to net use z: /delete.
NOTE: The newly created mapped drive will now appear for ALL users of this system but they will see it displayed as "Disconnected Network Drive (Z:)". Do not let the name fool you. It may claim to be disconnected but it will work for everyone. That's how you can tell this hack is not supported by M$.
I found a solution that is similar to the one with psexec but works without additional tools and survives a reboot.
Just add a sheduled task, insert "system" in the "run as" field and point the task to a batch file with the simple command
net use z: \servername\sharedfolder /persistent:yes
Then select "run at system startup" (or similar, I do not have an English version) and you are done.
You'll either need to modify the service, or wrap it inside a helper process: apart from session/drive access issues, persistent drive mappings are only restored on an interactive logon, which services typically don't perform.
The helper process approach can be pretty simple: just create a new service that maps the drive and starts the 'real' service. The only things that are not entirely trivial about this are:
The helper service will need to pass on all appropriate SCM commands (start/stop, etc.) to the real service. If the real service accepts custom SCM commands, remember to pass those on as well (I don't expect a service that considers UNC paths exotic to use such commands, though...)
Things may get a bit tricky credential-wise. If the real service runs under a normal user account, you can run the helper service under that account as well, and all should be OK as long as the account has appropriate access to the network share. If the real service will only work when run as LOCALSYSTEM or somesuch, things get more interesting, as it either won't be able to 'see' the network drive at all, or require some credential juggling to get things to work.
A better way would be to use a symbolic link using mklink.exe. You can just create a link in the file system that any app can use. See http://en.wikipedia.org/wiki/NTFS_symbolic_link.
There is a good answer here:
https://superuser.com/a/651015/299678
I.e. You can use a symbolic link, e.g.
mklink /D C:\myLink \\127.0.0.1\c$
You could us the 'net use' command:
var p = System.Diagnostics.Process.Start("net.exe", "use K: \\\\Server\\path");
var isCompleted = p.WaitForExit(5000);
If that does not work in a service, try the Winapi and PInvoke WNetAddConnection2
Edit: Obviously I misunderstood you - you can not change the sourcecode of the service, right? In that case I would follow the suggestion by mdb, but with a little twist: Create your own service (lets call it mapping service) that maps the drive and add this mapping service to the dependencies for the first (the actual working) service. That way the working service will not start before the mapping service has started (and mapped the drive).
ForcePush,
NOTE: The newly created mapped drive will now appear for ALL users of this system but they will see it displayed as "Disconnected Network Drive (Z:)". Do not let the name fool you. It may claim to be disconnected but it will work for everyone. That's how you can tell this hack is not supported by M$...
It all depends on the share permissions. If you have Everyone in the share permissions, this mapped drive will be accessible by other users. But if you have only some particular user whose credentials you used in your batch script and this batch script was added to the Startup scripts, only System account will have access to that share not even Administrator.
So if you use, for example, a scheduled ntbackuo job, System account must be used in 'Run as'.
If your service's 'Log on as: Local System account' it should work.
What I did, I didn't map any drive letter in my startup script, just used net use \\\server\share ... and used UNC path in my scheduled jobs. Added a logon script (or just add a batch file to the startup folder) with the mapping to the same share with some drive letter: net use Z: \\\... with the same credentials. Now the logged user can see and access that mapped drive. There are 2 connections to the same share. In this case the user doesn't see that annoying "Disconnected network drive ...". But if you really need access to that share by the drive letter not just UNC, map that share with the different drive letters, e.g. Y for System and Z for users.
Found a way to grant Windows Service access to Network Drive.
Take Windows Server 2012 with NFS Disk for example:
Step 1: Write a Batch File to Mount.
Write a batch file, ex: C:\mount_nfs.bat
echo %time% >> c:\mount_nfs_log.txt
net use Z: \\{your ip}\{netdisk folder}\ >> C:\mount_nfs_log.txt 2>&1
Step 2: Mount Disk as NT AUTHORITY/SYSTEM.
Open "Task Scheduler", create a new task:
Run as "SYSTEM", at "System Startup".
Create action: Run "C:\mount_nfs.bat".
After these two simple steps, my Windows ActiveMQ Service run under "Local System" priviledge, perform perfectly without login.
The reason why you are able to access the drive in when you normally run the executable from command prompt is that when u are executing it as normal exe you are running that application in the User account from which you have logged on . And that user has the privileges to access the network. But , when you install the executable as a service , by default if you see in the task manage it runs under 'SYSTEM' account . And you might be knowing that the 'SYSTEM' doesn't have rights to access network resources.
There can be two solutions to this problem.
To map the drive as persistent as already pointed above.
There is one more approach that can be followed. If you open the service manager by typing in the 'services.msc'you can go to your service and in the properties of your service there is a logOn tab where you can specify the account as any other account than 'System' you can either start service from your own logged on user account or through 'Network Service'. When you do this .. the service can access any network component and drive even if they are not persistent also.
To achieve this programmatically you can look into 'CreateService' function at
http://msdn.microsoft.com/en-us/library/ms682450(v=vs.85).aspx and can set the parameter 'lpServiceStartName ' to 'NT AUTHORITY\NetworkService'. This will start your service under 'Network Service' account and then you are done.
You can also try by making the service as interactive by specifying SERVICE_INTERACTIVE_PROCESS in the servicetype parameter flag of your CreateService() function but this will be limited only till XP as Vista and 7 donot support this feature.
Hope the solutions help you.. Let me know if this worked for you .
I find a very simple method: using command "New-SmbGlobalMapping" of powershell, which will mount drive globally:
$User = "usernmae"
$PWord = ConvertTo-SecureString -String "password" -AsPlainText -Force
$creds = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $User, $PWord
New-SmbGlobalMapping -RemotePath \\192.168.88.11\shares -Credential $creds -LocalPath S:
You wan't to either change the user that the Service runs under from "System" or find a sneaky way to run your mapping as System.
The funny thing is that this is possible by using the "at" command, simply schedule your drive mapping one minute into the future and it will be run under the System account making the drive visible to your service.
I can't comment yet (working on reputation) but created an account just to answer #Tech Jerk #spankmaster79 (nice name lol) and #NMC issues they reported in reply to the "I found a solution that is similar to the one with psexec but works without additional tools and survives a reboot." post #Larry had made.
The solution to this is to just browse to that folder from within the logged in account, ie:
\\servername\share
and let it prompt to login, and enter the same credentials you used for the UNC in psexec. After that it starts working. In my case, I think this is because the server with the service isn't a member of the same domain as the server I'm mapping to. I'm thinking if the UNC and the scheduled task both refer to the IP instead of hostname
\\123.456.789.012\share
it may avoid the problem altogether.
If I ever get enough rep points on here i'll add this as a reply instead.
Instead of relying on a persistent drive, you could set the script to map/unmap the drive each time you use it:
net use Q: \\share.domain.com\share
forfiles /p Q:\myfolder /s /m *.txt /d -0 /c "cmd /c del #path"
net use Q: /delete
This works for me.
Related
I have a PHP script that runs a Powershell Stop-Process command through shell_exec(). PHP runs as IUSR. When I run the script, I receive an access denied error message. If I run the command in PowerShell using my Administrator account, it works as expected.
How do I grant IUSR the ability to execute Stop-Process in Powershell?
I wasn't able to find a solution to grant IUSR the specific privileges to execute Stop-Process, but I was able to get around this by changing the "Anonymous Authentication" user associated with the kill script from IUSR to Administrator.
In IIS 8.5, go to Sites->My Site->Folder Name. On the main panel, click on Authentication under IIS. Right click on Anonymous Authentication and then click on Edit.
You can set the "Anonymous Authentication" value at any level of your IIS app; from the site level to the sub-directory level. I recommend only changing the value from IUSR to Administrator on the directory that actually hosts your kill script. Changing it for the whole site might create problems for other parts of the application.
I've seen some information that suggests if you add a limited user to the Performance Monitor Users group and grant it debug privileges, it will be able to terminate processes.
You might consider something a bit less risky though, like running another web app as a user with those rights, that can only be accessed from the local machine. Then make your PHP app do a web request to the internal app to do it's killin'.
If you're trying to kill only a specific process this lets you further limit the impact because the internal app could be designed to only kill that one thing.
Other ways to achieve a similar separation is to have for example a scheduled task that looks for a file with specific content in a specific directory, when it sees it, it kills a process and deletes the file. IUSR can be given permission to create files in that directory as a way to trigger this. This method is very easy to implement but isn't synchronous.
I have a script on my domain stored on the Active Directory server. every machine on the domain has a task that when fired, calls this script to run.
Running the task from the AD server works. Running the task from another machine doesn't work. However, running the command that is triggered from cmd manually on the remote computer works?
Could anyone shine some light on this. Basically I call it like this so that the trigger is set up like...
Action: PowerShell.exe
Arguments: -noprofile –ExecutionPolicy Bypass -File "\\<>NameOfADServer<>\C$\Tasks\script.ps1" "Argument 1" "Argument 2"
Running as SYSTEM is probably your issue - it wont have any access outside of the PC its running on.
When you run it manually youll have the access.
There's several problems here.
You're running the task as the local SYSTEM accounts. SYSTEM generally does not have access to any network resources.
You're using the administrative share (\\<servername>\C$) to share the script. Only users that have Administrator access to the server can access the administrative shares. Administrative shares are heavily restricted by design and you cannot modify the access on them.
My guess is that the script works when you run it manually is because it's using the current user's credentials for network access when you do that, but don't quote me on that.
The simplest solution with the least amount of change is to do this:
Create a group in Active Directory. Add the Computer accounts, or, preferably, groups with Computer accounts which you want to be able to run the script to this new group. If you really want any SYSTEM account on any computer in the domain to be able to run the script, you can add the "Domain Computers" group to the group.
Create a folder on the server. Put the script in the folder. Don't put anything in this folder you don't want your users to read. Assign the "Read" NTFS permission to the group created above to the folder.
Share the folder out. Grant the group you just created the "Full Control" share access. If you want, you can make it a hidden share by adding a dollar sign to the end of the name.
Update your scheduled tasks to use \\<servername>\<sharename>\script.ps1.
This is almost certainly not the best method to accomplish what you're actually trying to do, but this is probably the best way to use scheduled tasks running scripts on a network share with the SYSTEM account.
i need to make the users program on X computer only accessible to "admin" using a batch file . the net comand seems to have only a delete option for perms using net share, but i need to only admin and the local machine can access it. i think net may not work but i dont even know.
Currently, the perms are:
EVERYONE: Full
LOCAL MACHINE: full
i need to delete the entry everyone, and add the entry admin. would i use net share /delete?
Is there a way to elevate privileges to the level required to write files to a network folder with our Delphi 2006 (Win32) application?
The user running the application does not have permission to write (or view) files in the network folder in question.
Any recommended techniques or alternative suggestions?
You could prompt the user to enter credentials for a user with elevated permissions and then temporarily operate under that other user's login while writing to the network share. To do this, you are looking for the LogonUser and ImpersonateLoggedOnUser functions. Please see this answer.
Use WNetAddConnection2 to connect to the UNC path, you will need to use the lpUsername and lpPassword parameters (either ask the user for them or hide them somewhere in your app).
You can choose if you want to map a local driver letter to the UNC path or not (in that case use nil for the lpLocalname parameter). After you've done that you can access the UNC path without specifying credentials.
I am running on a Windows Server 2003. This is my problem:
I wrote a Perl script to automate the copy of some files from my Server machine to some network drives. I am using xcopy to copy the files. My problem is the permissions.
If I run the script from the command line, it works, all the copies are successful.
If I try to run the script using a service all the copies fail. This service is a program that I wrote that takes the script and runs it. In the background all it is doing is to call the C function 'system' and it runs the same program that I can run from the command line.
I have tried many variations of this to figure out what is wrong with it but I can't see why the service would not run the same way I run it from the command line.
I set up the service to run as the same user I am using from the command line.
I also tried to map the network drives as the user that has writing permission but the result is the same. Manually the script works, from the service, it doesn't.
Any suggestion is appreciated.
Thanks
Tony
The service may be running as the system and not have access to the network drives. In the Service settings, change the service to run under your account (or an account with the relevant permissions/mappings).
When the service runs, it uses whatever credentials you specify in the Services manager of Windows. The default, LOCAL SERVICE, probably does not have permission to access the resources to be copied.
Create a new user account with the minimum set of permissions needed to perform the copy and configure your service to run under that account.
I did figure out the issue (I think), and that matches what I later found in another post:
https://serverfault.com/questions/4623/windows-can-i-map-a-network-drive-for-a-service-account
<...Persistent drive mappings are only restored during an interactive login, which the service does not use. I believe the only way to get a service to use a network drive is for that service to map the drive itself or alternatively for it to us a UNC path instead of a mapped drive.>
What I did was mapping the drive using the service and that seems to work. It turns out, if I map the drive and save credentials, then I can access later the drive without having to map it again. I don't know why this approach seems to work though.
-Thanks everybody for your help.
Tony