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Case Study 6 - Combining Hot Desking With Host Filtering 87
Case Study 6 -
Combining Hot
Desking With Host
Filtering
This case study describes the tasks that need to be performed in order to
set up hot desking with the ability to filter out specific hosts. This
configuration allows infected PCs to be isolated regardless of where the
user has connected to the network in a hot desking office environment.
The method combines MAC-address based authentication with IEEE
802.1X authentication and Auto VLAN.
Network
Administrator Tasks
The following provides an overview of the tasks for a network
administrator responsible for the domain on the network.
1 Ensure edge port security is set to MAC-address based authentication (or
RADA) And IEEE 802.1X, and Auto VLAN is enabled.
Edge ports are called ‘access ports’ on the Switch 5500.
Using 3Com Network Access Manager:
2 Create VLANs and QoS profiles. Use the same VLAN IDs and QoS profile
IDs as set up in the network access device (switch or wireless access
point), otherwise the network access device may not accept the RADIUS
response.
3 Decide which VLAN will be the Isolation VLAN.
4 Create an Isolation rule.
a Set security permissions for the Isolation rule. Grant READ and WRITE
access to the users/groups permitted to apply the rule, grant READ
access to all Network Administrators in the domain to ensure they can
see that the rule exists even if they are not permitted to apply the rule.
b Set the Actions for the Isolation rule:
■ select the rule priority, an Isolation rule should have a high priority
to ensure it takes precedence over other rules,
■ set Network Access to Allow,
select the VLAN ID of the Isolation VLAN.
5 Ensure the network operators or those individuals responsible for
applying the rules have the Network Operator component of 3Com
Network Access Manager installed on their PC.