Network IDS Sensor/system and retrieval of Images

Ok.. on this page:

http://www.Cisco.com/Kobayashi/SW-Center/ciscosecure/IDs/crypto/

Objective: I want to burn an image from the Images "system and recovering" rather than order a CD from recovery for IDS.

Issues related to the:

1 is it possible or not that you must order the recovery CD?

2. I see that the files under 'System and recovery Images' are in the format tar.pkg. Is this based on Linux or Solaris? Can I use Red Hat Linux to extract this file and then burn it to a CD?

3. If so, is - anyone know how to extract the file?

-TKS.

Answers:

(1) No, you must order the recovery CD.

(2) there are 2 types of files: System and recovery.

The system Images (- sys-) are used only for the installation of sensors that support ROMMON (like the 4215 IDS, IPS-4240 and IPS-4255). The sensors supporting ROMMON have no CDROM drives, and so the image must be tftpd to the sensor through ROMMON.

System Images are used for recovery after disaster where the compactflash/hard disk from the sensor has been severely damaged or a new white compactflash/hard disk was placed in the sensor.

Recovery (r) - Inages updated only the probe recovery Partition. They must be installed from a running Application Partition. The .pkg is a special Cisco IDS application-specific extension. There are special methods for unpacking and installation of the unerlying files.

In ordinary situations the user will constantly update their software to sensor by the normal process of upgrade using large updates (- shift-), minor updates (- min-), Service Pack (sp) - or Signature updates (-- GIS).

It isn't that where the effective Partition becomes corrupt that a user must always start on the recovery Partition and load a new Partition of Application.

Most of the users will never update their recovery Partition. Thus, users who have purchased the IDS-4235 for example with the 4.0 software (1) will be a 4.0 (1) recovery Image. If they later upgraded to 4.1 (1) and the experience of corruption then they can always start the recovery Partition and reload 4.0 (1). If they do not want to return to 4.0 (1) provide us a recovery Image to update the Partition recovery to 4.1 (1).

The only time wherever a recovery CD is really necessary is when the user goes from 3.x, 4.x, because of the drastic change between the 2 versions, or if the recovery Partition has also been damaged, or if you use a blank hard drive.

3.

I don't think the recovery or System Images contains the files needed to create a recovery CD. If I just remember additional files have been added to the recovery CD to make it bootable, which were not necessary on the system image or recovery since they were based on a sensor that was already underway.

Tags: Cisco Security

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