CLI Reference Guide-R05

Chapter 9 | General Security Measures
Web Authentication
– 298 –
show network-access
mac-filter
Use this command to display information for entries in the MAC filter tables.
Syntax
show network-access mac-filter [filter-id]
filter-id - Specifies a MAC address filter table. (Range: 1-64)
Default Setting
Displays all filters.
Command Mode
Privileged Exec
Example
Console#show network-access mac-filter
Filter ID MAC Address MAC Mask
--------- ----------------- -----------------
1 00-00-01-02-03-08 FF-FF-FF-FF-FF-FF
Console#
Web Authentication
Web authentication allows stations to authenticate and access the network in
situations where 802.1X or Network Access authentication are infeasible or
impractical. The web authentication feature allows unauthenticated hosts to
request and receive a DHCP assigned IP address and perform DNS queries. All other
traffic, except for HTTP protocol traffic, is blocked. The switch intercepts HTTP
protocol traffic and redirects it to a switch-generated web page that facilitates user
name and password authentication via RADIUS. Once authentication is successful,
the web browser is forwarded on to the originally requested web page. Successful
authentication is valid for all hosts connected to the port.
Note: RADIUS authentication must be activated and configured for the web
authentication feature to work properly (see “Authentication Sequence” on
page 218).
Note: Web authentication cannot be configured on trunk ports.
Table 57: Web Authentication
Command Function Mode
web-auth login-attempts Defines the limit for failed web authentication login
attempts
GC
web-auth quiet-period Defines the amount of time to wait after the limit for
failed login attempts is exceeded.
GC
web-auth session-timeout Defines the amount of time a session remains valid GC