Selasa, 04 Oktober 2011

RE: [AccessDevelopers] Access Restriction

 

It is tricky to block access to data in a database yet allow them to access the same data through an Excel link.  In order for the Excel file to be able to get the data, I imagine the person with the Excel file would have to have access to the Access database file as well.
 
So then it becomes, is there a way to lock down the database so that the Excel user can't see the data.  If you compile the database to an MDE, that locks down forms, queries, reports, and modules, but the data tables are still visible, so that probably won't work.  You can go into Tools --> Startup... and set it so Database Window, special access keys, etc. are all disabled, but it doesn't stop users from using the Shift bypass key.  There is a way to disable the Shift bypass functionality as well  (http://www.access-programmers.co.uk/forums/showthread.php?t=51479), but be VERY careful or you make it so you can't access the database at all either!  Backup, backup, backup!
 
One other concern is that if people can link to the data from Excel, then they could link to any data in the database.  What if you only want them to be able to link to some tables and not others.  In this case, you may want to set up a seperate data file that the Excel User can access, and then block access to the main database file via file permissions.  In the main database file, just link to the table that is stored in the Excel-user-accessible file.
 
Hope that helps,
Toby
 
-----Original Message-----
From: AccessDevelopers@yahoogroups.com [mailto:AccessDevelopers@yahoogroups.com] On Behalf Of m_bacheldor
Sent: Tuesday, October 04, 2011 8:48 AM
To: AccessDevelopers@yahoogroups.com
Subject: [AccessDevelopers] Access Restriction

 

Good Afternoon,

I have gotten my database working pretty good for now, but now I am faced with a security issue. Is there a was to restrict access, who can open the database, but still allow users to access data through linked/restricted excel files?
I have set up excel files that have hard code linkes to the database queries. I would like for the users to be able to refresh the data from the excel files but I do not want them to be able to open/access the database.
It seems like the requirements that I am given to complete this task change daily.

I appreciate you responses,

Mark

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