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Cisco IE 2000 Switch Software Configuration Guide
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Chapter 13 Configuring IEEE 802.1x Port-Based Authentication
Information About Configuring IEEE 802.1x Port-Based Authentication
If a host falls back to web authentication on a port without a configured ACL:
• If the port is in open authentication mode, the auth-default-ACL-OPEN is created.
• If the port is in closed authentication mode, the auth-default-ACL is created.
The access control entries (ACEs) in the fallback ACL are converted to per-user entries. If the configured
fallback profile does not include a fallback ACL, the host is subject to the auth-default-ACL associated
with the port.
Note If you use a custom logo with web authentication an d it is stored on an external server, the port ACL
must allow access to the external server before authentication. You must either configure a static port
ACL or change the auth-default-ACL to provide appropriate access to the external server.
Cisco Secure ACS and Attribute-Value Pairs for the Redirect URL
The switch uses these cisco-av-pair VSAs:
• url-redirect is the HTTP to HTTPS URL.
• url-redirect-acl is the switch ACL name or number.
The switch uses the CiscoSecure-Defined-ACL attribute value pair to intercept an HTTP or HTTPS
request from the end point device. The switch then forwards the client web browser to the specified
redirect address. The url-redirect attribute value pair on the Cisco Secure ACS contains the URL to
which the web browser is redirected. The url-redirect-acl attribute value pair contains the name or
number of an ACL that specifies the HTTP or HTTPS traffic to redirect. Traffic that matches a permit
ACE in the ACL is redirected.
Note Define the URL redirect ACL and the default port ACL on the switch.
If a redirect URL is configured for a client on the authentication server, a default port ACL on the
connected client switch port must also be configured.
Cisco Secure ACS and Attribute-Value Pairs for Downloadable ACLs
You can set the CiscoSecure-Defined-ACL Attribute-Value pair on the Cisco Secure ACS with the
RADIUS cisco-av-pair vendor-specific attributes (VSAs). This pair specifies the names of the
downloadable ACLs on the Cisco Secure ACS with the #ACL#-IP-na me-number attribute.
• The name is the ACL name.
• The number is the version number (for example, 3f783768).
If a downloadable ACL is configured for a client on the authentication server, a default port ACL on the
connected client switch port must also be configured.
If the default ACL is configured on the switch and the Cisco Secure ACS sends a host-access-policy to
the switch, it applies the policy to traffic from the host connected to a switch port. If the policy does not
apply, the switch applies the default ACL. If the Cisco Secure ACS sends the switch a downloadable
ACL, this ACL takes precedence over the default ACL that is configured on the switch port. However,
if the switch receives an host access policy from the Cisco Secure ACS but the default ACL is not
configured, the authorization failure is declared.
For configuration details, see the “Authentication Manager” section on page 13-6 and the “Configuring
802.1x Authentication with Downloadable ACLs and Redirect URL s” section on page 13-48.