Thanks man,but it stops worm and Malware howz that? with no action for virus?

How the sensors works in order to  stops worm and Malware

Explain more

IPS sensor has the followiong features:

1) Analysis engine with thousands of signatures. If a packet and/or traffic matches specific signature, it will trigger specific action accordingly.

2) Anomaly engine, where it baseline the traffic pattern, and report if there is anomaly to the normal traffic pattern.

Here is a more detailed explaination of the IPS services:

http://www.cisco.com/en/US/prod/collateral/vpndevc/ps5729/ps5713/ps4077/data_sheet_c78-459520_ps4077_Products_Data_Sheet.html

IPS is not design to prevent virus, hence ASA has 2 different modules: AIP-SSM (IPS module) and CSC-SSM (antivirus module).

But how it works to stop Warm and Malware? however CSC-SSM does this function as well

CSC module only supports 4 protocols, ie: FTP, HTTP, SMTP and POP3.

IPS has thousands of signatures and handles all other protocols, not restrictive to the above 4 protocols on CSC module.