Per-User ACL Support for 802.1X/MAB/Webauth Users
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1 Per-User ACL Support for 802.1X/MAB/Webauth Users This feature allows per-user ACLs to be downloaded from the Cisco Access Control Server (ACS) as policy enforcement after authentication using IEEE 802.1X, MAB authentication bypass, or web authentication. Finding Feature Information, page 1 Prerequisites for Per-User ACL Support for, page 1 Restrictions for Per-User ACL Support for, page 2 Information About Per-User ACL Support for, page 2 How to Configure Per-User ACL Support for, page 3 Configuration Examples for Per-User ACL Support for, page 5 Additional References, page 5 Feature Information for Per-User ACL Support for, page 6 Finding Feature Information Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to An account on Cisco.com is not required. PrerequisitesforPer-UserACLSupportfor802.1X/MAB/Webauth Users AAA authentication must be enabled. 1
2 Restrictions for Per-User ACL Support for Per-User ACL Support for AAA authorization must be enabled by using the network keyword to allow interface configuration from the RADIUS server X authentication must be enabled. The user profile and VSAs must be configured on the RADIUS server. Restrictions for Per-User ACL Support for 802.1X/MAB/Webauth Users Per-user Access Control Lists (ACLs) are supported only in single-host mode. This feature does not support standard ACLs on the switch port. Only one 802.1X-authenticated user is supported on a port. If the multiple-hosts mode is enabled on the port, the per-user ACL attribute is disabled for the associated port. The maximum size of the per-user ACL is 4000 ASCII characters but is limited by the maximum size of RADIUS-server per-user ACLs. ACLs are not supported on fixed Cisco Integrated Services Routers (ISRs). Information About Per-User ACL Support for 802.1X Authentication with Per-User ACLs Per-user access control lists (ACLs) can be configured to provide different levels of network access and service to an 802.1X-authenticated user. When the RADIUS server authenticates a user that is connected to an 802.1X port, it retrieves the ACL attributes based on the user identity and sends them to the switch. The switch applies the attributes to the 802.1X port for the duration of the user session. The switch removes the per-user ACL configuration when the session is over, if authentication fails, or if a link-down condition occurs. The switch does not save RADIUS-specified ACLs in the running configuration. When the port is unauthorized, the switch removes the ACL from the port. Router ACLs and input port ACLs can be confiugured on the same switch. However, a port ACL takes precedence over a router ACL. If an input port ACL is applied to an interface that belongs to a VLAN, the port ACL takes precedence over an input router ACL that is applied to the VLAN interface. Incoming packets received on the port to which a port ACL is applied are filtered by the port ACL. Incoming routed packets received on other ports are filtered by the router ACL. Outgoing routed packets are filtered by the router ACL. To avoid configuration conflicts, the user profiles should be carefully planned and stored on the RADIUS server. RADIUS supports per-user attributes, including vendor-specific attributes. These vendor-specific attributes (VSAs) are in octet-string format and are passed to the switch during the authentication process. The VSAs used for per-user ACLs are inacl#<n > for the ingress direction and outacl#<n > for the egress direction. MAB ACLs are supported only in the ingress direction. The switch supports VSAs only in the ingress direction. It 2
3 Per-User ACL Support for How to Configure Per-User ACL Support for does not support port ACLs in the egress direction on Layer 2 ports. For more information, see the Configuring Network Security with ACLs module. The extended ACL syntax style should be used to define the per-user configuration that is stored on the RADIUS server. When the definitions are passed from the RADIUS server, they are created by using the extended naming convention. However, if the Filter-Id attribute is used, it can point to a standard ACL. The Filter-Id attribute can be used to specify an inbound or outbound ACL that is already configured on the switch. The attribute contains the ACL number followed by.in for ingress filtering or.out for egress filtering. If the RADIUS server does not allow the.in or.out syntax, the access list is applied to the outbound ACL by default. Because of limited support of Cisco IOS access lists on the switch, the Filter-Id attribute is supported only for IP ACLs numbered 1 to 199 and 1300 to 2699 (IP standard and IP extended ACLs). Only one 802.1X-authenticated user is supported on a port. If the multiple-hosts mode is enabled on the port, the per-user ACL attribute is disabled for the associated port. The maximum size of the per-user ACL is 4000 ASCII characters but is limited by the maximum size of RADIUS-server per-user ACLs. How to Configure Per-User ACL Support for Configuring Downloadable ACLs To configure a switch to accept downloadable ACLs or redirect URLs from the RADIUS server during authentication of an attached host, perform this task. SUMMARY STEPS 1. enable 2. configure terminal 3. ip device tracking 4. aaa new-model 5. aaa authorization network default group radius 6. radius-server vsa send authentication 7. interface interface-id 8. ip access-group acl-id in 9. end 10. show running-config interfaceinterface-id 11. copy running-config startup-config DETAILED STEPS Step 1 Command or Action enable Purpose Enables privileged EXEC mode. 3
4 Configuring Downloadable ACLs Per-User ACL Support for Command or Action Purpose Enter your password if prompted. Step 2 Switch> enable configure terminal Enters global configuration mode. Step 3 Switch# configure terminal ip device tracking Enables the IP device tracking table. Step 4 Switch(config)# ip device tracking aaa new-model Enables AAA. Switch(config)# aaa new-model Step 5 aaa authorization network default group radius Switch(config)# aaa authorization network default group radius Sets the authorization method. To remove the authorization method, use the no aaa authorization network default group radius command. Step 6 radius-server vsa send authentication Configures the network access server. Step 7 Switch(config)# radius-server vsa send autentication interface interface-id Switch(config)# interface gigabitethernet0/1 Specifies the port to be configured, and enters interface configuration mode. Step 8 Step 9 Step 10 ip access-group acl-id in Switch(config-if)# ip access-group 99 in end show running-config interfaceinterface-id Switch# show running-config interface interface-id Configures the default ACL on the port in the input direction. Note The ACL ID is an access list name or number. Switch(config-if)# end Returns to Privileged EXEC mode. Displays the specific interface configuration for verification. 4
5 Per-User ACL Support for Configuration Examples for Per-User ACL Support for Step 11 Command or Action copy running-config startup-config Purpose (Optional) Save entries in the configuration file. Switch# copy running-config startup-config Configuration Examples for Per-User ACL Support for Configuring a Switch for a Downloadable Policy The following example shows how to configure a switch for a downloadable policy: Switch# configure terminal Switch(config)# aaa new-model Switch(config)# aaa authorization network default local group radius Switch(config)# ip device tracking Switch(config)# ip access-list extended default_acl Switch(config-ext-nacl)# permit ip any any Switch(config-ext-nacl)# exit Switch(config)# radius-server vsa send authentication Switch(config)# interface fastethernet 2/13 Switch(config-if)# ip access-group default_acl in Switch(config-if)# exit Additional References Related Documents Related Topic Authentication commands IPsec RADIUS Standalone MAB Support Layer 2 ports Document Title Cisco IOS Security Command Reference Commands A to C Cisco IOS Security Configuration Guide: Secure Connectivity, Release Configuring RADIUS module. Standalone MAB Support Configuring Network Security with ACLs 5
6 Feature Information for Per-User ACL Support for Per-User ACL Support for Standards and RFCs Standard/RFC IEEE 802.1X protocol RFC 3580 Title IEEE 802.1x Remote Authentication Dial In User Service (RADIUS) MIBs MIB CISCO AUTH FRAMEWORK MIB CISCO MAB AUTH BYPASS MIB CISCO PAE MIB IEEE8021 PAE MIB MIBs Link To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: Technical Assistance Description The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. Link Feature Information for Per-User ACL Support for The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to An account on Cisco.com is not required. 6
7 Per-User ACL Support for Feature Information for Per-User ACL Support for Table 1: Feature Information for Per-User ACL Support for Feature Name Per-User ACL Support for Releases Cisco IOS XE 3.2SE Cisco IOS XE 3.3SE Feature Information This feature allows per-user ACLs to be downloaded from the Cisco Access Control Server (ACS) as policy enforcement after authentication using IEEE 802.1X, MAB authentication bypass, or web authentication. In Cisco IOS XE Release 3.2SE, this feature was supported on the following platforms: Catalyst 3850 Series Switches Cisco 5760 Wireless LAN Controller In Cisco IOS XE Release 3.3SE, this feature was supported on the following platforms: Catalyst 3650 Series Switches Cisco Catalyst 3850 Series Switches. 7
8 Feature Information for Per-User ACL Support for Per-User ACL Support for 8
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