![]() This feature is in Cisco IOS software releases 8.3 or later, and uses packet filtering. Where there are no specific prerequisites for applying ACL in the network, it should be done with professional network/security engineers. Today, we will look at ACL concepts as well as troubleshooting common cases that you may see.Ī quick note before we dive in. An access control list (ACL) provides the network security in your routing and switching environments through a rule or series of rules that can permit or deny data traffic from the network layer. As network security helps businesses reduce the risk of data theft and disturbance in production network operations, it is key to understand your security environment. Network security is as important now than ever with data getting bigger and more precious.
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