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Cisco Intrusion Prevention System CLI Sensor Configuration Guide for IPS 7.1
OL-19892-01
Chapter 21 Obtaining Software
IPS Software Versioning
Figure 21-1 illustrates what each part of the IPS software file represents for major and minor updates,
service packs, and patch releases.
Figure 21-1 IPS Software File Name for Major and Minor Updates, Service Packs, and Patch
Releases
Signature Update and Signature Engine Update
A signature update is a package file containing a set of rules designed to recognize malicious network
activities. Signature updates are released independently from other software updates. Each time a major
or minor update is released, you can install signature updates on the new version and the next oldest
version for a period of at least six months. Signature updates are dependent on a required signature
engine version. Because of this, a req designator lists the signature engine required to support a
particular signature update.
The signature engine update is contained in the signature updates.
Figure 21-2 illustrates what each part of the IPS software file represents for signature updates and
signature engine updates.
Figure 21-2 IPS Software File Name for Signature Updates and Signature Engine Updates
333819
Product line
Platform identifier
Strong crypto designator
Major version level
Minor version level
Service pack level
Repackage level
Patch level
Signature engine level
File extension
IPS-identifier-K9-x.y-z[a or p1]-E1.pkg
333820
Product line
Package type
Signature update
Software version requirement designator
Required engine version
File extension
IPS-[sig]-[S]-req-E1.pkg