Detections
Analytics

1.18 CISC-L2-000220

Information

The Cisco switch must not have the default VLAN assigned to any host-facing switch ports.

GROUP ID: V-220691
RULE ID: SV-220691r991947

In a VLAN-based network, switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with other networking devices using Spanning-Tree Protocol (STP), Dynamic Trunking Protocol (DTP), VLAN Trunking Protocol (VTP), and Port Aggregation Protocol (PAgP)-all untagged traffic. As a consequence, the default VLAN may unwisely span the entire network if not appropriately pruned. If its scope is large enough, the risk of compromise can increase significantly.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Remove the assignment of the default VLAN from all access switch ports.

See Also

https://workbench.cisecurity.org/benchmarks/23772

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7, CAT|II, CCI|CCI-004891, Rule-ID|SV-220691r991947_rule, STIG-ID|CISC-L2-000220, Vuln-ID|V-220691

Plugin: Cisco

Control ID: 70cdf31469f3864fa6bbc154b4f2d6cb9dee56311bee05316c0e04e9ee2172f0