Disable IP Directed Broadcasts on all Layer 3 Interfaces

Opis

An IP directed broadcast is an IP packet whose destination address is a valid broadcast address for an IP subnet, but which originates from a node that is not itself a part of that destination subnet. Directed broadcasts can be abused in several ways: - a volumetric DOS attack against the NX-OS switch itself, the sent volume of data can be much larger than the received request - a volumetric DOS attack against a third party (often called a "smurf attack") ... CIS marks this Manual; directed broadcast only appears in the config when enabled. Audited against the output of 'show running-config' (run 'terminal length 0' first; do not use 'show running-config all', which adds default values).

Svojstva

Operativni sistemi

Bilo koji

Oznake

cisco-nxosnetworkhardening

Referenca

CIS Cisco NX-OS Benchmark v1.2.0 - 3.2.4 Disable IP Directed Broadcasts on all Layer 3 Interfaces