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Cisco Bug: CSCtd80621 - ENH: DNS Inspection Needs to Allow Truncated DNS Responses

Last Modified

Sep 09, 2016

Products (1)

  • Cisco Catalyst 6500 Series Firewall Services Module

Known Affected Releases


Description (partial)


By design, Domain Name System (DNS) inspection on Firewall Services Module (FWSM) blocks DNS responses with Truncated flag set.


DNS Inspection is enabled with <cmdbold>inspect dns</cmdbold> Modular Policy Framework (MPF) command.
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