Cisco Cisco Firepower Management Center 2000

In some cases, if you create an access control policy referencing either a network rule set to block 
all IPv6 addresses with 

::/0

 or a network rule set to block all IPv4 addresses with 

0.0.0.0/0

, the 

system incorrectly blocks all traffic. (CSCut58667)

All new support cases must be opened using the Cisco Technical Assistance Center (TAC) by phone, web 
or email. To open a TAC case online, you must have a 

Cisco.com

 user ID and contract number. If you 

need assistance opening a case, call the Cisco TAC at 800-553-2447.

For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a 
service request, and gathering additional information about Cisco ASA devices, see What’s New in 
Cisco Product Documentation at: 

Subscribe to What’s New in Cisco Product Documentation, which lists all new and revised Cisco technical 
documentation, as an RSS feed and deliver content directly to your desktop using a reader application. The 
RSS feeds are a free service.

If you have any questions or require assistance with Cisco ASA devices, please contact Cisco Support:

Visit the Cisco Support site at

Email Cisco Support at

.

Call Cisco Support at 1.408.526.7209 or 1.800.553.2447.

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of 
Cisco trademarks, go to this URL:

. Third-party trademarks mentioned are the property of their respective owners. The 

use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any 
examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. 
Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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