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Cisco Bug: CSCvs63724 - DOC: FTD 6.4's new feature is not reflected on the FMC configuration guide ver 6.4.0

Last Modified

Apr 14, 2020

Products (1)

  • Cisco Firepower Management Center

Known Affected Releases

6.4.0

Description (partial)

Symptom:
In FTD 6.4's Release Notes, there is the description of "Snort restart improvents" shown as belowed:
====Cisco Firepower Release Notes, Version 6.4.0====
Before Version 6.4, during Snort restarts, the system dropped encrypted connections that matched a 'Do not decrypt' SSL rule or default policy action.

 Now, routed/transparent traffic passes without inspection instead of dropping, as long as you did not disable large flow offload or Snort preserve-connection.

Supported platforms: Firepower 4100/9300
====Cisco Firepower Release Notes, Version 6.4.0====
Link: https://www.cisco.com/c/en/us/td/docs/security/firepower/640/relnotes/firepower-release-notes-640/features.html

However, there is not updated information about "Now, routed/transparent traffic passes without inspection instead of dropping, as long as you did not disable large flow offload or Snort preserve-connection." in FMC configuration guide, ver 6.4.

====Firepower Management Center Configuration Guide, Version 6.4  ====
Note also that the following traffic drops even when preserve-connection is enabled:
	・when Snort goes down before the system tags traffic that would have matched a Do not decrypt SSL rule or default policy action
====Firepower Management Center Configuration Guide, Version 6.4  ====
Link: 
Which is the same as FMC cofiguration guide before ver 6.3.

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