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Cisco ASA 5500 Series Configuration Guide using ASDM
OL-20339-01
Chapter 33 Configuring AAA Rules for Network Access
Using MAC Addresses to Exempt Traffic from Authentication and Authorization
The order of entries matters, because the packet uses the first entry it matches, as opposed to a best match
scenario. If you have a permit entry, and you want to deny an address that is allowed by the permit entry,
be sure to enter the deny entry before the permit entry.
To use MAC addresses to exempt traffic from authentication and authorization, perform the following
steps:
Step 13 From the Configuration > Firewall > AAA Rules pane, choose Add > Add MAC Exempt Rule.
The Add MAC Exempt Rule dialog box appears.
Step 14 From the Action drop-down list, click one of the following, depending on the implementation:
• MAC Exempt
• No MAC Exempt
The MAC Exempt option allows traffic from the MAC address without having to authenticate or
authorize. The No MAC Exempt option specifies a MAC address that is not exempt from authentication
or authorization. You might need to add a deny entry if you permit a range of MAC addresses using a
MAC address mask such as ffff.ffff.0000, and you want to force a MAC address in that range to be
authenticated and authorized.
Step 15 In the MAC Address field, specify the source MAC address in 12-digit hexadecimal form; that is,
nnnn.nnnn.nnnn.
Step 16 In the MAC Mask field, specify the portion of the MAC address that should be used for matching. For
example, ffff.ffff.ffff matches the MAC address exactly. ffff.ffff.0000 matches only the first 8 digits.
Step 17 Click OK.
The dialog box closes and the rule appears in the AAA Rules table.
Step 18 Click Apply.
The changes are saved to the running configuration.
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