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Cisco Bug: CSCsz27964 - Firewall should NOT drop ICMP Dest Port Unreachable pkts for ICMP pass

Last Modified

Jan 30, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)


ICMP Dest Port Unreachable packet is dropped when the firewall action for ICMP is pass 


The ICMP Dest Port Unreachable packet will be generated if the destination port is not available. However, the current firewall inspect action would drop such ICMP packet. When the pass action is configured to workaround this limitation, the  ICMP Dest Port Unreachable packet is still gets dropped
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