Cisco Catalyst 2960 Series, Configuration Manual

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Port Security
You can configure web-based authentication and port security on the same port. Web-based authentication
authenticates the port, and port security manages network access for all MAC addresses, including that of the
client. You can then limit the number or group of clients that can access the network through the port.
Default Web-Based Authentication Configuration
The following table shows the default web-based authentication configuration.
Table 130: Default Web-based Authentication Configuration
Default Setting Feature
Disabled AAA
• None specified
• 1645
• None specified
RADIUS server
• IP address
• UDP authentication port
• Key
3600 seconds Default value of inactivity timeout
Enabled Inactivity timeout
Web-Based Authentication Configuration Guidelines and Restrictions
• Web-based authentication is an ingress-only feature.
• You can configure web-based authentication only on access ports. Web-based authentication is not
supported on trunk ports, EtherChannel member ports, or dynamic trunk ports.
• You must configure the default ACL on the interface before configuring web-based authentication.
Configure a port ACL for a Layer 2 interface or a Cisco IOS ACL for a Layer 3 interface.
• You cannot authenticate hosts on Layer 2 interfaces with static ARP cache assignment. These hosts are
not detected by the web-based authentication feature because they do not send ARP messages.
• By default, the IP device tracking feature is disabled on a switch. You must enable the IP device tracking
feature to use web-based authentication.
• You must configure at least one IP address to run the switch HTTP server. You must also configure
routes to reach each host IP address. The HTTP server sends the HTTP login page to the host.
• Hosts that are more than one hop away might experience traffic disruption if an STP topology change
results in the host traffic arriving on a different port. This occurs because the ARP and DHCP updates
might not be sent after a Layer 2 (STP) topology change.
• Web-based authentication does not support VLAN assignment as a downloadable-host policy.
• Web-based authentication supports IPv6 in Session-aware policy mode. IPv6 Web-authentication requires
at least one IPv6 address configured on the switch and IPv6 Snooping configured on the switchport.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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Information About Web-Based Authentication