Best Practices for Protecting the Data Plane
To secure the data plane, adhere to these best practices:
Block unwanted traffic at the router. If your corporate policy does not allow TFTP traffic, just implement ACLs that deny traffic that is not allowed. You can implement ACLs inbound or outbound on any Layer 3 interface on the router. With extended ACLs, which can match based on the source and/or destination address, placing the ACL closer to the source saves resources because it denies the packet before it consumes network bandwidth and before ...
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