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DLP Exception Rule for File Copy

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I created a rule to block all files being copy to/from Removable storage devices.

However, I wanted to exclude this rule for some company devices. How should I do that? 

Thanks.

1 Solution

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ISmith
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Message 6 of 7

Re: DLP Exception Rule for File Copy

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There are two different rule types that cannot be mixed.

1. Data protetion rule (which is what you have.) It can be filtered by application, user, classification.

2. Device rule: which can be filtered by device information

You need a device rule, which has an exception for your list of device VID/PID.

 

 

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McAfee Employee Mreaden
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Re: DLP Exception Rule for File Copy

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Hello, User72274901.

 

You could use the same policy, however you would need to set up Device Definitions for the devices you would like to exclude. 

Once configured you could add those devices under the Exception tab of the policy in question. 

Re: DLP Exception Rule for File Copy

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Hello Mreaden,

Yes, this is what I'm intended to archieve, but sadly, I couldn't found the way to add the Device Definition I created to the Exception tab in the policy. (See the screenshot)

Capture.JPG

 

Thanks.

McAfee Employee DLP_RS
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Message 4 of 7

Re: DLP Exception Rule for File Copy

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To best of my knowledge, I am not aware if we can use Device Definition in this rule.

 

McAfee Employee Mreaden
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Re: DLP Exception Rule for File Copy

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User72274901,

You should probably use a Removable Storage Device rule. With this rule, you can specify the device definitions in question.
You would first need to create the Device Control definition. If you go to the Policy Manager and click on Definitions tab, under Device Control,
you could use either the Serial Number & End User Pair or Device Template to create a Removable Storage Device Template.
Once created you can create a Removabel Storage Device rule policy and add the newly created template as an exception.


Hope this helps.


Jermaine

ISmith
Level 9
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Message 6 of 7

Re: DLP Exception Rule for File Copy

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There are two different rule types that cannot be mixed.

1. Data protetion rule (which is what you have.) It can be filtered by application, user, classification.

2. Device rule: which can be filtered by device information

You need a device rule, which has an exception for your list of device VID/PID.

 

 

Re: DLP Exception Rule for File Copy

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The rule you are actually referring to is a Protection rule, not a Device Rule. This implies that you are allowing the device itself to be plugged in with read/write access. 

If you only want to allow specific devices and block them from the Plug and Play rules and allow only allow a specific device for certain machines, then you need a ruleset with a Plug and Play/Windows Portable Device rule with an exception for the specific VID/PID for that device, that is Activated in a separate policy. You can then create a Policy Assignment Rule and apply that specific policy by tag to specific machines for them to get that policy. If you have other rulesets that have protection rules then activate those rulesets in that policy. 

You would also need to add a Removable Storage Device rule for USB Removable Storage that also has the VID/PID exclusion. The PNP rule blocks at the driver level, the Removable Storage rule blocks at the file system level. 

If you specifically want to monitor the copying of files to/from for removable storage devices allowed, then a Removable Storage Protection rule is needed. You can have this rule configured in the ruleset with your protection rules that is activated in the same policy that you are tagging systems with that are allowed read/write access from your device rules.

You could have a single ruleset or multiple rulesets configured in the policy. Just be careful which rulesets/rules you have activated in the policy since DLP will always take the most restrictive action, so while you have an exception in one place, it may still block because there is a more restrictive rule in a different ruleset activated in the same policy.

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