Is it possible to attach an FS filter driver on a mapped network drive?
I'm really new to this filter driver work and currently testing a demo version of an SDK. It works fine on my local drive and I was able monitor and even deny file creation. But it doesn't seem to work on a mapped network drive.
So my question is: Is it even possible to do that?
Of course.
You simply need to check in you instance attach if your filesystem type is a network filesystem.
Read more here, especially the VolumeDeviceType and VolumeFilesystemType parameters.
Good luck,
Gabriel
SCENARIO
I've been researching on Google ways to do this but I'm not finding anything, so I really hope SO can help out a netadmin from SF. I see a lot of ways to export FROM the Windows event logs, and ways to write events for custom written apps, but nothing so far for taking existing log files and "converting" them to eventvwr entries.
I'm working on an issue where I need a way to receive notifications/alerts based on the Windows Server DHCP audit logs: http://technet.microsoft.com/en-us/library/dd759178.aspx
The logs are written to C:\windows\system32\DHCP as DhcpSrvLog-Fri ,etc. and auto-rotate on their own.
I need information from this log (particulary event 10's which show a new lease to a client), and will be querying it and comparing it against AD and then either writing to a new CSV file or writing a new eventvwr entry directly.
WHAT'S NEEDED
END RESULT: The end goal here is to receive an email notification when a non-AD joined device gets a DHCP lease address from our DHCP server. More specific details can be found here: https://serverfault.com/questions/550653/windows-dhcp-server-get-notification-when-a-non-ad-joined-device-gets-an-ip-ad
However, in regards to this particular question, what I'm looking for is understanding of how to take an existing file (csv) and write a custom Windows event log entry based on its contents.
I can't seem to find ways to take an existing file as input. Would I have to write something that parses through the DHCP server audit logs and creates various variables that get included in something like Write-Eventlog? If Powershell is the wrong path to go down, I'm open to suggestions.
The DHCP server logs are not built the same way as an event, so you have to parse the csv file and create events manually. Since there wasn't any real question here I'll just provide a sample to get you going(untested and incomplete):
Import-Csv filename | Where-Object { $_.ID -eq 10 } | ForEach-Object {
#If you're using quest module for AD management
if(!(Get-QADComputer -Name $($_."Host Name"))) {
Write-EventLog ........
}
}
I have a requirement to detect all users from local and Active Directory(if present) in Windows.
I have found that C API: NetQueryDisplayInformation() has also the option to retrieve the information from a "serverName", which is presumably an Active Directory which can be queried.
But how do I find out if ActiveDirectory is available/ and it's name ?
Thanks.
This information is available in WMI. In the Win32_ComputerSystem class (there will be a single instance per computer) has a Domain property containing the domain's name.
Another way of finding out domain name (if present) is to use WIN API ::DsGetDcName()
This one returns information about Active Dir server name in DOMAIN_CONTROLLER_INFO struct.
You get there all the domain information you need. Much sympler than using WMI :-)
Assume I have access to a SMB server at IP 1.2.3.4, how can I determine the list of available shares?
Windows Explorer can do it when I enter a UNC path \\1.2.3.4\ - but command prompt "dir \\1.2.3.4\" fails!
I've tried the usual FindFirstFile/FindNext calls - which I use successfully to read the files and directories on each share, but they don't work directly on the server root.
Ideally, I need something that works for XP onwards.
Edit: I want to do this programatically, rather than from command line. Redirecting and parsing the output from 'net view 1.2.3.4' would work, but I'm ideally looking for an API for this job.
According to the docs there's a NetShareEnum and a WNetEnumResource function.
net view \\1.2.3.4
Check out http://www.ss64.com/nt/net_share.html
Edit: If you want to do this programmatically, it looks like NetShareEnum would work.
It appears you can use WMI to get this information. Check this post for some neat PowerShell tutorials that show now to use the Win32_Share WMI object.
Never use WMI (not installed natively)
Use Win32 api to enumerate shares, posted millions of times on google groups( win32)
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.