Group Policy For Mac



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There are reasons why USB or removable device usage typically banned in an organization. The common reason is for sanity, as we know that these devices can be the media of virus and malware to spread. There is also security reason, as sometimes people can put confidential data in these devices, which could easily be lost or stolen. Now if organizations wants to avoid such risks, IT administrator can always block USB or removable devices using Group Policy. This control can be the alternative to secure the network before implementing more complex security solutions like anti-virus or data loss prevention.

The Centrify administrative template for Mac OS X (centrifymacsettings.xml or centrifymacsettings.admx) provides group policies that can be applied to control the behavior of Mac OS X computers running supported versions of the Mac OS X operating system, and the configuration settings for the users who log on to those computers.By adding the administrative template for Mac OS X to a Group. Mac App Store; For a list of supported policies and their preference key names, see Microsoft Edge browser policies reference. In the policy templates file, which can be downloaded from the Microsoft Edge Enterprise landing page, there's an example plist (itadminexample.plist) in the examples folder. The example file contains all supported data. Evaluating Centrify for Mac Installation Planning, preparation, and deployment Deployment Manager User's Guide License management Upgrade and compatibility Managing Linux and UNIX Managing Windows Managing Macs Configuration Group policies Configuration and tuning reference Network information service Reporting Auditing Managing audit.

How to Block USB or Removable Devices using Group Policy

This scenario will demonstrate the way to completely block USB or removable devices in client PC. The client PC is running Windows 10 and joined to a domain named asaputra.com, where the Domain Controller is installed on Windows Server 2012 R2.

Using Group Policy Management Console in Domain Controller, the way to configure this Group Policy is pretty straightforward as the settings has been provided the settings under Computer Configuration > Policies > Administrative Template > System > Removable Storage Access.

As seen on the above screenshot, various settings for several device types has been preconfigured, such as removable disks (includes USB flash drive and external hard disk), WPD or Windows Portable Device (includes smartphone, music player, etc), CD and DVD, and even tape drives and floppy drives. Note that there are three types of deny action that we can choose:

  • Deny read access: Computer will totally block all users from reading contents in the removable storage. It also effectively prevents users from transferring anything from/to the removable storage. Administrator can use this if they want to completely restrict the usage of removable storage.
  • Deny write access: Computer will prevent all users transferring anything to the removable storage, but not the other way around. Users will still be able to read contents in the removable storage. This action is suitable if the administrator only wants to protect confidential data in the computer from being copied out to a removable storage.
  • Deny execute access: Computer will not prevent users from transferring anything from/to the removable storage, but it will block users from opening programs and files stored in the removable storage. This action is suitable if the administrator only wants to protect the computer from virus or malware that might be exist in the removable storage.

The right setting that match the scenario here is Removable Disks: Deny write Access. To enable it as shown below.

Policy must be applied at the computer level. When the policy has been applied, all logged in users will no longer have access to the USB flash drive or external hard disk attached on the computer. This message below will be shown in the client when they attempted to do so:

It is worth noting that administrator can also apply this policy at the user level, so each users may have different privilege on the computer. The settings can be found in User Configuration > Policies > Administrative Template > System > Removable Storage Access.

Notice that there are less available settings here compared to settings that can be applied at the computer level. At user level, we can only control read and write access, while at computer level we can also control execute access.

Troubleshooting

To force the policy update we can use command gpupdate /force in the command prompt as usual. In some case, the access rights may not be changed despite the policy has been applied. If this happens, then it may be required to also enable the setting to Set time (in seconds) to force reboot.

Group Policy For Mac Computers

Computer will be forced to reboot after the defined time and the access rights will be changed afterwards. That’s pretty much all you need to know to block USB or removable devices using Group Policy.

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Arranda Saputra

ITIL Certified, CCNA, CCDA, VCP6-DCV, MCSA Administering Windows Server 2012

Group Policy For Mac Pro

I am IT practitioner in real life with specialization in network and server infrastructure. I have years of experience in design, analysis, operation, and optimization of infrastructure solutions for enterprise-scaled network. You can send me a message on LinkedIn or email to arranda.saputra@outlook.com for further inquiry regarding stuffs that I wrote or opportunity to collaborate in a project.
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In my last post I discussed the potential uses and requirements for managing Mac clients in a dual directory environment. In this post, I will delve in deeper to discuss how you can actually configure these settings.

First things first

Group Policy For Mac

Before you jump in, you will need to have the Mac server configured and integrated into the Active Directory (AD) domain. The Mac Server will need to become an Open Directory (OD) Master connected to another Directory, and the client will need to be bound to both the AD and OD.

Group Policy For Mac

Finally, you will need to download and install the Apple Server Admin Tools related to your specific Mac Server OS (10.6.8 or 10.7.3).

Workgroup Manager: GUI options

Mixed in key for mac torrent. Right, once you have completed the above steps, you should be able to launch Workgroup Manager, connect to the Mac Server and authenticate as the Directory Administrator. The newly bound Mac will appear under the Computers tab, ready for management.

Select the computer in the left list and the Preferences button in the top toolbar. The right hand section will change to display a list of preferences similar to System Preferences on a client Mac.

Note: The availability of these preferences can change, dependant on a Computer or a User (or groups of) being selected

Let’s take one of our examples from my previous post, setting shut down times. Select the “Energy Saver” option, followed by the “Schedule tab” along the top.

This option can only be Managed Always or not at all, so select “Always”. Next, tick the second box, select “Shut Down” and “Weekdays” from the drop-down menus and fill in the desired time.

Finally, click “Apply Now” and you’re done! It’s as simple as that.

I would recommend that you elect a test Mac to apply these preferences to and just try out each one in turn and see what it does.

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Note: Managed Macs normally require a log in and out to apply the new settings, but sometimes update better after a full restart.

Workgroup Manager: Preference Manifest Options

You’ve had a play with the GUI side and found out some interesting settings but it’s not enough. You need greater control over your clients!

Well, select the “Details” tab to get access to the raw plist files for editing. These are known as the preference manifests and provide a finer and deeper control over Mac settings.

If you have not yet configured any preferences, this box could be empty. You can populate it in one of four ways:

  1. Set some preferences in the GUI side and view them in the details tab
  2. Import a preference file into Workgroup Manager (discussed below)
  3. Add the manage client bundle. Click the small plus symbol in the lower left corner and navigate to /System/Library/Core Services and add the “ManagedClient” bundle
  4. Add the application to have Mac OS X look for the manifest. Click the small plus symbol in the lower left corner and navigate to the desired application. Add this and the OS will look for a preference manifest it can use.

Once you have the manifest file imported you can modify its contents before pushing this out. In the below example, I will modify Safari’s homepage.

Select the Computer/User on the left hand side, go to the preferences details tab and import Safari preferences through one of the methods listed above.

Once imported, double click the name (in this case “Safari”). Open the disclosure triangle on the how often you want the preference to apply (in this case “Always”) and click “New Key”.

In the drop down box (currently showing “New Item”) click to show a list of options. Change this to show “Homepage” and fill in the “Value” box with a website address (in the example I have chosen Amsys’ website).

Once complete, click “Apple Now” to save these changes.

You can use the same method to manually enter specific Key names that might not be in the drop down list. Consult the application’s documentation for possible advice on these values. Again, I would recommend that you elect a test Mac to apply these preferences to and just try out each one in turn and see what it does.

Note: Managed Macs normally require a log in and out to apply the new settings, but sometimes update better after a full restart.

Workgroup Manager: Importing Preferences

Like the idea of enhanced control provided by the preference manifests but don’t like the idea of hunting around locating what the relevant Keys might be? Well, there is another way that combines both of the above.

Simply grab one of the Macs you plan to manage, set all the preferences as you want, then copy off the relevant plist files. Copy these to the server and import them into Workgroup Manager.

You can use the same plus button to add configured plist files as you used to add the Managed Client bundle.

A few points of advice:

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Group Policy Basics

  1. Have open the /Library/Preferences and ~/Library/Preferences folders and arrange them by Data modified. It will make it easier to see what plist files are modified as you change settings
  2. When importing the plist files, take time to go through the actual content and remove any Keys that aren’t relevant. This will prevent unexpected behaviour and settings being enforced on clients, unnecessarily.
  3. Some applications store bespoke plist files in the /Library/Application Support folders instead of, or in addition to standard plist files. If this is the case, you may have to find an alternative mechanism to manage these options.

Group Policy For Mac Download

Conclusion

Well I hope that’s given you plenty of ideas to try out on your systems and to help manage those troublesome users!

Please always remember to back everything up and test your MCXs before rolling them out site-wide to ensure they act as expected! I’m sorry to say we can’t accept any responsibility for issues arising from using MCXs.

Still want more? Check out the next blog post, where I’ll be going over some other advanced areas that are related to Managing client Macs.

Links

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10.6.8
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If you require help with Mac deployment or AD integration within your organisation please get in touch, or check out our range of support & consultancy services here.





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