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Cisco Bug: CSCum73754 - Traceroute not working correclty with twice NAT in transparent mode.

Last Modified

Apr 20, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

8.4(7.240)

Description (partial)

Symptom:
Trace-route doesn't work correctly when using twice NAT in transparent mode.

ASA is wrongly translating an intermediate hop on receiving 'icmp: time exceeded in-transit' message, leading to wrong result by trace-route.

Conditions:
ASA configured with a twice NAT rule.
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