Cisco Cisco IPS 4255 Sensor

If you previously filled out the Encryption Software Export Distribution Authorization form, and read 
and accepted the Cisco Systems Inc. Encryption Software Usage Handling and Distribution Policy, these 
forms are not displayed again. The File Download dialog box appears.

Open the file or save it to your computer.

Follow the instructions in the Readme to install the update.

Major and minor updates, service packs, recovery files, signature and signature engine updates 
are the same for all sensors. System image files are unique per platform.

This section describes the various IPS software files, and contains the following sections:

 illustrates what each part of the IPS software file represents for major and minor updates, 

service packs, and patch releases.

Contains new functionality or an architectural change in the product. For example, the IPS 5.0 base 
version includes everything (except deprecated features) since the previous major release (the minor 
update features, service pack fixes, and signature updates) plus any new changes. Major update 5.0(1) 
requires 4.x. With each major update there are corresponding system and recovery packages.

191013

Product line/platform designator

Strong crypto designator

Major version level

Minor version level

Service pack level

Repackage level

Patch level

Signature engine level

File extension