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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter68 Configuring IKE, Load Balancing, and NAC
Configuring Network Admission Control Policies
•Revalidation Period—The ASA starts this timer after each successful posture validation. The
expiration of this timer triggers the next unconditional posture validation. The ASA maintains
posture validation during revalidation. The default group policy becomes effective if the Access
Control Server is unavailable during posture validation or revalidation. Enter the interval in seconds
between each successful posture validation. The range is 300 to 86400. The default setting is 36000.
•Default ACL— (Optional) The ASA applies the security policy associated with the selected ACL if
posture validation fails. Select None or select an extended ACL in the list. The default setting is
None. If the setting is None and posture validation fails, the ASA applies the default group policy.
Use the Manage button to populate the drop-down list and view the configuration of the ACLs in the
list.
•Manage— Opens the ACL Manager dialog box. Click to view, enable, disable, and delete standard
ACLs and the ACEs in each ACL. The list next to the Default ACL attribute displays the ACLs.
•Authentication Server Group—Specifies the authentication server group to use for posture
validation. The drop-down list next to this attribute displays the names of all server groups of type
RADIUS configured on this ASA that are available for remote access tunnels. Select an ACS group
consisting of at least one server configured to support NAC.
•Posture Validation Exception List—Displays one or more attributes that exempt remote computers
from posture validation. At minimum, each entry lists the operating system and an Enabled setting
of Yes or No. An optional filter identifies an ACL used to match additional attributes of the remote
computer. An entry that consists of an operating system and a filter requires the remote computer to
match both to be exempt from posture validation. The ASA ignores the entry if the Enabled setting
is set to No.
•Add—Adds an entry to the Posture Validation Exception list.
•Edit—Modifies an entry in the Posture Validation Exception list.
•Delete—Removes an entry from the Posture Validation Exception list.
What to Do Next
Following the configuration of the NAC policy, you must assign it to a group policy for it to become
active. To do so, choose Configuration > Remote Access VPN> Network (Client) Access > Group
Policies > Add or Edit > General > More Options and the NAC policy name from the drop-down list
next to the NAC Policy attribute.
Modes
The following table shows the modes in which this feature is available:
Modes
The following table shows the modes in which this feature is available:
Firewall Mode Security Context
Routed Transparent Single
Multiple
Context System
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