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Cisco Bug: CSCuj02359 - CBAC incorrectly drops TCP RST packet due to RST inside current window

Last Modified

Feb 11, 2016

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(15)T6a 15.0(1)M3 15.2(1)T1

Description (partial)

Symptom:
On an IOS router running CBAC (Context-Based Access Control) Firewall, a legit TCP
RST packet may be dropped with the drop reason "RST inside current window TCP".

Conditions:
This problem only occurs when CEF (Cisco Express Forwarding) is enabled.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
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