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Cisco Bug: CSCsy98662 - Access-list allows port ranges with start-port greater than end-port

Last Modified

Nov 09, 2016

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

8.0(4.25)

Description (partial)

Symptom:
The ASA/PIX command line allows you to configure access-list entries with port ranges such that the start port is greater than the end port. For example:

access-list test permit tcp any any range 2000 1000

This may cause issues with configuration utilities, namely ASDM, that do sanity checks to ensure the start port is less than then end port.

Conditions:
This behavior is present on version 8.0.4 ad presumably earlier versions as well.
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