3com DUA1550-0AAA02 Manuel D’Utilisation

1 Enter the MAC address for the computer that needs to be blacklisted. For 

information on entering MAC addresses, see “Entering MAC Addresses 
For A Computer”in Chapter 3.

2 Associate the Blacklist rule with the computer, see “Associating Rules 

With A Computer” in Chapter 3.

The network operator cannot enter the MAC address for a computer. 
However, the operator can apply the Blacklist rule to a specific computer 
once the computer’s MAC address has been entered. The operator can 
also remove the computer from the blacklist if circumstances require it.

On being informed that a specific PC needs to be denied access to the 
network, use the Active Directory Users and Computers interface to 
perform the following:

1 Either:

click on Computers in the Tree pane, or

if Organizational Units have been created, click on the organizational 
units subfolders until you reach the desired unit holding the computer.

2 Highlight the specific device in the Details pane, and right-click. Select 

Properties.

3 Select the Network Access tab from the Properties dialog window.

A list of rules that the operator has permission to apply will be displayed.

4 Tick the Blacklist rule to apply it to the PC.

5 Click OK and exit the Active Directory Users and Computers interface

On being informed that a specific PC can be removed from the Blacklist, 
use the Active Directory Users and Computers interface to perform the 
following:

1 Either:

click on Computers in the Tree pane, or

if Organizational Units have been created, click on the organizational 
units subfolders until you reach the desired unit holding the computer.

2 Highlight the specific device, and right-click. Select Properties.

3 Select the Network Access tab from the Properties dialog window.