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Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.1
OL-24002-01
Appendix E Troubleshooting
Troubleshooting the Appliance
To verify a master blocking sensor configuration, follow these steps:
Step 1
Log in to the CLI.
Step 2
View the ARC statistics and verify that the master blocking sensor entries are in the statistics.
sensor#
show statistics network-access
Current Configuration
AllowSensorShun = false
ShunMaxEntries = 250
MasterBlockingSensor
SensorIp = 10.89.149.46
SensorPort = 443
UseTls = 1
State
ShunEnable = true
ShunnedAddr
Host
IP = 122.122.122.44
ShunMinutes = 60
MinutesRemaining = 59
Step 3
If the master blocking sensor does not show up in the statistics, you need to add it.
Step 4
Initiate a manual block to a bogus host IP address to make sure the master blocking sensor is initiating
blocks.
sensor#
configure terminal
sensor(config)#
service network-access
sensor(config-net)#
general
sensor(config-net-gen)#
block-hosts 10.16.0.0
Step 5
Exit network access general submode.
sensor(config-net-gen)#
exit
sensor(config-net)#
exit
Apply Changes:? [yes]:
Step 6
Press
Enter
to apply the changes or type
no
to discard them.
Step 7
Verify that the block shows up in the ARC statistics.
sensor#
show statistics network-access
Current Configuration
AllowSensorShun = false
ShunMaxEntries = 100
State
ShunEnable = true
ShunnedAddr
Host
IP = 10.16.0.0
ShunMinutes =
Step 8
Log in to the CLI of the master blocking sensor host, and using the
show statistics network-access
command, verify that the block also shows up in the master blocking sensor ARC statistics.
sensor#
show statistics network-access
Current Configuration
AllowSensorShun = false
ShunMaxEntries = 250
MasterBlockingSensor
SensorIp = 10.89.149.46
SensorPort = 443
UseTls = 1
State