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Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2
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Chapter18 Configuring the ASA 5500-X IPS SSP
Configuration Sequence for the ASA 5500-X IPS SSP
•
The ASA 5500-X IPS SSP (except the ASA 5512-X IPS SSP and the ASA 5515-X IPS SSP)
supports the String ICMP XL, String TCP XL, and String UDP XL engines. These engines provide
optimized operation for these platforms.
TCP Reset Differences Between IPS Appliances and ASA IPS Modules
The IPS appliance sends TCP reset packets to both the attacker and victim when reset-tcp-connection is
selected. The IPS appliance sends a TCP reset packet only to the victim under the following
circumstances:
•
When a deny-packet-inline or deny-connection-inline is selected
•
When TCP-based signatures and reset-tcp-connection have NOT been selected
In the case of the ASA IPS modules, the TCP reset request is sent to the ASA, and then the ASA sends
the TCP reset packets. The ASA sends TCP reset packets to both the attacker and victim when the
reset-tcp-connection is selected. When deny-packet-inline or deny-connection-inline is selected, the
ASA sends the TCP reset packet to either the attacker or victim depending on the configuration of the
signature. Signatures configured to swap the attacker and victim when reporting the alert can cause the
ASA to send the TCP reset packet to the attacker.
Configuration Sequence for the ASA 5500-X IPS SSP
Perform the following tasks to configure the ASA 5500-X IPS SSP:
1.
Obtain and install the current IPS software if your software is not up to date.
2.
Obtain and install the license key.
3.
Log (session) in to the ASA 5500-X IPS SSP.
4.
Run the setup command to initialize the ASA 5500-X IPS SSP.
5.
Verify initialization for the ASA5500-X IPS SSP.
6.
Configure the adaptive security appliance to send IPS traffic to the ASA550 0-X IPSSSP.
7.
Perform other initial tasks, such as adding users, trusted hosts, and so forth.
8.
Configure intrusion prevention.
9.
Configure global correlation.
10.
Perform miscellaneous tasks to keep your ASA 5500-X IPS SSP running smoothly.
11.
Upgrade the IPS software with new signature updates and service packs as they become available.
12.
Reimage the ASA 5500-X IPS SSP when needed.
For More Information
•
For the procedure for logging in to the ASA 5500-X IPS SSP, see Chapter ii, “Logging In to the
Sensor.”
•
For the procedure for running the setup command, see Advanced Setup for the ASA 5500-X IPS
SSP, page2-13.
•
For the procedure for verifying initialization for the ASA 5500-X IPS SSP, see Verifying
Initialization for the ASA 5500-X IPS SSP, page 18-3.
•
For the procedure for creating virtual sensors, see Creating Virtual Sensors for the ASA 5500-X IPS
SSP, page18-4.
•
For the procedures for setting up the ASA 5500-X IPS SSP, see Chapter3, “Setting Up the Sensor.”