Verifying the configuration

If Host C tries to log in to Device through web for six times but fails to log in, the device blacklists Host C. Use the display blacklist all command to view all added blacklist entries.

[Device] display blacklist all
                    Blacklist information
------------------------------------------------------------------------------
Blacklist                               : enabled
Blacklist items                         : 2
------------------------------------------------------------------------------
IP              Type   Aging started       Aging finished      Dropped packets
                       YYYY/MM/DD hh:mm:ss YYYY/MM/DD hh:mm:ss
5.5.5.5         manual 2011/04/09 16:02:20 Never               0
192.168.1.4     manual 2011/04/09 16:02:26 2011/04/09 16:12:26 0

Host D and Host C are on the blacklist. Host C will stay on the list for 10 minutes, and will then be able to try to log in again. The entry for Host D will never age out. When you do not consider Host D an attacker anymore, you can use the undo blacklist ip 5.5.5.5 command to remove the entry.