Question

Allow Database to access a shared folder, but not the users

Asked by: jjafferr

Hi guys

We have a domain server,
15 users,
Access mde as FE, with SQL server as BE on a shared folder1,
shared folder2 contains files.

The users have full access to the SQL server BE folder, with full control for read/write/modify,
so no issues with the Database.

On shared folder2, we have files/documents.

The FE will read the files the use want to save in folder2, and it should be able to save them there,
and through FE, it can display the files on folder2 for the user, and on click, it will open it, delete it, based on the user privilege set in the DB.

I can code the above.

my question is, since folder2 will be shared on the network,
how can I make the DB access it, and not allow the users to access it.

in another words, how can I make the DB act like a user with full privilege to folder2, and how can I set the authentication username and password to the server via code.

TIA

jaffer

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Asked On
2009-02-28 at 13:19:57ID24187141
Topics

Microsoft Access Database

,

MS SQL Server

,

Network Management

Participating Experts
4
Points
500
Comments
16

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Answers

 

by: aibusinesssolutionsPosted on 2009-02-28 at 13:38:06ID: 23765466

Sounds like you need the access front end to impersonate a user that has access to folder2, instead of running as the current user.  

It's simple to make a program run as administrator in the compatibility tab, but I'm not sure about making it run as an alternate domain user.

 

by: milduraitPosted on 2009-02-28 at 14:18:24ID: 23765623

If i am understanding this correctly, the you have linked tables in the front-end to sql server yes?
I would have thought that you could setup user permissions inside of sql server, and then disallow the users access to the database shared folder,  Worst case scenario, setup the sql server in mixed mode and and setup some sql authentication and modify the links in the fe mde.
 

 

by: jmoss111Posted on 2009-02-28 at 15:30:59ID: 23765872

The users need no permissions on the shared folder to access the SQL Server.

 

by: mark_willsPosted on 2009-02-28 at 16:41:54ID: 23766086

This is not so much a SQL problem as it is an OS problem, so you need to look at the users (accounts) and controls from an OS perspective. So, might be worthwhile making a new domain user and having that account start up SQL Server Service, that way when SQL Server wants to access shares and so on you can individually identify the SQL Server Service Account and change access control accordingly. As a matter of course nowadays, I always set up a domain account for SQL Server Service and SQL Server Agent Service rather than use some of the default or built in accounts. Either which way, will be an idea to see how you can group various users so that you can control access a bit easier.

Have a look at http://support.microsoft.com/kb/907557 to see that a domain account is always applicable. The a discussion : http://msdn.microsoft.com/en-us/library/ms143504(SQL.90).aspx and how to change http://msdn.microsoft.com/en-us/library/ms345578(sql.90).aspx

 

by: aibusinesssolutionsPosted on 2009-02-28 at 16:50:48ID: 23766134

I think the other users on here aren't reading your description correctly.  Let me explain it a little better.

His request has nothing to do with SQL, he has a folder on a server (Folder2) that contains documents that Access should be able to open and or delete.

He wants Access to be able to open/delete these files, but not the user.  The user should get an access denied when they try and few that folder.

@jaffer:  Ideally, in your code to list the files from Folder2, you will want to do some sort of Impersonation, that will allow Access access to that folder with permissions other than the current user.  Access uses VBScript so you should be able to impersonate with your query.  Something like:

Dim strPath, strUser, strPW
strPath = "\\ServerName\Folder2"
strUser = "DOMAIN\User"
strPW = "P@$$w0rd"

What command are you using to list the files in the users folder?  There should be a way to include authentication with it.

 

by: mark_willsPosted on 2009-02-28 at 16:55:55ID: 23766156

Agree, it is not a sql server problem - it is OS and user account privileges - the reason for those links is to establish a domain user account for SQL so you can control and identofy users seperately. Once you do that, you can easily deny access to everyone but the SQL Server Service Account (domain user).

 

by: jjafferrPosted on 2009-02-28 at 18:55:08ID: 23766495

aibusinesssolution, Mark

Thanks for your input, very much appreciated.
You are right interms of this is more of a OS Q rather than SQL, however, I always like to explain the whole setup, as sometimes the solution is some where else other than where I see :)

Mark:
I will go through the links you gave, and I prefer the SQL being a Domain user, it might make things easier.
Anything further hints you can provide for this setup?

aibusinesssolution:
If Access have the privilege as a Domain user, then why should I need to identify its username/password everytime it accesses folder2?
I use normal FileSystemObject method.

jaffer

 

by: aibusinesssolutionsPosted on 2009-02-28 at 19:00:52ID: 23766512

If you do not want the standard domain user to have access to folder2, but you Do want your access app to have access to that folder, then you will need to identify the username and password of a user that Does have access to folder2 with your FileSystemObject.

Standard User tries to view Folder 2 = denied

User with read/write permissions impersonated by FileSystemObject = granted.

 

by: jjafferrPosted on 2009-02-28 at 19:05:34ID: 23766529

agree, but doesn't the permission gets granted the 1st time Access log-in on the Domain server?
then after that, Access can read/write in folder2 without further permissions!!

It's like a normal Domain user who log-in one time, then everything they do, doesn't require further log-in.

Am i on the same wave lengther as you are??

jaffer

 

by: aibusinesssolutionsPosted on 2009-02-28 at 19:07:51ID: 23766532

Oh yeah, I guess I wasn't very clear on that. You only need to authenticate once, not everytime.

 

by: milduraitPosted on 2009-02-28 at 19:09:12ID: 23766538

jjafferr:
did you listen to jmoss11, who is a master in SQL Server?

 

by: jjafferrPosted on 2009-02-28 at 19:15:49ID: 23766553

mildurait
Since I am coming from MS Access background, and the users should have the full permission on the BE folder, I assumed the same thing will apply on SQL BE too.
Thanks for the reminder, and thanks jmoss11 :)

But this does not reply to the shared folder2 issue, does it?


jaffer

 

by: milduraitPosted on 2009-02-28 at 19:40:06ID: 23766696

Jaffer
Assume makes ASS out of U and ME.
I'm sorry but I am unclear as to what files you are talking about in SharedFolder2

Just to clarify
a) your users should be able to access (read/write/modify) the folder in which the Front End mde resides.
b) your users do not need access to the folders where the mssql data is, as once you have setup the security correctly in....
     i) your sql server
     ii) your linked tables in the mde
    ... the mde will be able to access the table data in sql server.

You need to search for a solution of how to properly setup security within SQL Server in order to resolve your connectivity issues.

 

by: milduraitPosted on 2009-02-28 at 19:40:45ID: 23766697

Do you have a separe backend file which contains the links to sql server?

 

by: mark_willsPosted on 2009-02-28 at 19:46:23ID: 23766715

mildurait - yep jmoss11 is a master, and I am kind of handy on SQL Server as well. But I guess I am asking you to trust me on that score.

The thing is, if you can personalise the ownership of the (SQL) services with domain user accounts, then you can manage them just like any other user, and that is the difference here - we need to differentiate between user accounts.

Folder 2 we ONLY want the sql account to have access, it is easy enough to hide from all users, but need to be able to indentify the one user (or more accurately specific users) who can access that folder.

jaffer, those links are pretty self explanatory. The second one does have a few additional links going off to relevant sections. I think it is best to read through them, and maybe then ask questions. We will be here, and then when it comes down to more specific settings, then I think aibusinesssolution has the goods...

 

by: jjafferrPosted on 2009-03-22 at 02:19:20ID: 31561046

Hi guys,

I need a little longer time to test your suggestions/solutions, but I will come back and post a link to a new Q.

Thanks for your suggestions, very much appreciate.

jaffer

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