Cisco Cisco IPS 4255 Sensor

When deploying an IPS sensor monitoring two sides of a network device that does TCP sequence 
number randomization, we recommend using a virtual senor for each side of the device. 

After you upgrade any IPS software on your sensor, you must restart the IDM to see the latest 
software features. 

The IDM does not support any non-English characters, such as the German umlaut or any other 
special language characters. If you enter such characters as a part of an object name through the 
IDM, they are turned into something unrecognizable and you will not be able to delete or edit the 
resulting object through the IDM or the CLI.

This is true for any string that is used by CLI as an identifier, for example, names of time periods, 
inspect maps, server and URL lists, and interfaces.

You can only install eight IDSM2s per switch chassis.

When SensorApp is reconfigured, there is a short period when SensorApp is unable to respond to 
any queries. Wait a few minutes after reconfiguration is complete before querying SensorApp for 
additional information. 

The IDM and the IME launch MySDN from the last browser window you opened, which is the 
default setting for Windows. To change this default behavior, in Internet Explorer, choose Tools > 
Internet Options, and then click the Advanced tab. Scroll down and uncheck the Reuse windows 
for launching shortcuts check box.

For more information on interoperability between modules, refer to 

.

For more information about IPv6, switches, and lack of VACL capture, see 

For most IPS platforms, you can now recover the password on the sensor rather than using the service 
account or reimaging the sensor. This section describes how to recover the password for the various IPS 
platforms. It contains the following topics: