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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 initiate a manual block to a bogus host, follow these steps:
Step 1
Enter ARC general submode.
sensor#
configure terminal
sensor(config)#
service network-access
sensor(config-net)#
general
Step 2
Start the manual block of the bogus host IP address.
sensor(config-net-gen)#
block-hosts 10.16.0.0
Step 3
Exit general submode.
sensor(config-net-gen)#
exit
sensor(config-net)#
exit
Apply Changes:? [yes]:
Step 4
Press
Enter
to apply the changes or type
no
to discard them.
Step 5
Telnet to the router and verify that a deny entry for the blocked address exists in the router ACL. Refer
to the router documentation for the procedure.
Step 6
Remove the manual block by repeating Steps 1 through 4 except in Step 2 place
no
in front of the
command.
sensor(config-net-gen)#
no block-hosts 10.16.0.0
Enabling SSH Connections to the Network Device
If you are using SSH-3DES as the communication protocol for the network device, you must make sure
you have enabled it on the device.
To enable SSH-3DES connections to the network device, follow these steps:
Step 1
Log in to the CLI.
Step 2
Enter configuration mode.
sensor#
configure terminal
Step 3
Enable SSH-3DES.
sensor(config)#
ssh-3des host
blocking_device_ip_address
Step 4
Type
yes
when prompted to accept the device.
Blocking Not Occurring for a Signature
If blocking is not occurring for a specific signature, check that the event action is set to block the host.
To make sure blocking is occurring for a specific signature, follow these steps:
Step 1
Log in to the CLI.
Step 2
Enter signature definition submode.
sensor#
configure terminal