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What is the best version of ScreenOS to run with Deep Inspection (DI)?

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Article ID: KB9257 KB Last Updated: 11 Aug 2010Version: 5.0
Summary:

This article will answer the following questions:

  1. Which is the best version of ScreenOS for use with DI?
  2. Does ScreenOS 5.0 DI offer the same level of protection as later ScreenOS versions?
  3. Are there any changes to DI in newer versions of ScreenOS?
  4. How often do the DI updates occur for each ScreenOS version?
Symptoms:

Solution:

Later versions of ScreenOS have an updated Deep Inspection engine that is capable of identifying more complex intrusions and handling more advanced signatures.  Juniper recommends that customers interested in the highest possible level of Deep Inspection security upgrade to ScreenOS 5.3r5 or later.

Further information about the changes to DI in ScreenOS 5.3 and newer can be found in the release notes for the target version of ScreenOS.  Use either of the following links:

ScreenOS download page: Download Software

Technical Documentation page (select the ScreenOS version): Technical Documentation


Frequency of Updates:

For ScreenOS version 5.3r4 and below, the DI signature updates are executed monthly, whenever there is the need. For ScreenOS version 5.3r5 and above, the DI updates are executed daily with the latest attack object updates. Please refer to J-Security Center in order to check the latest Deep Inspection Update version.

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