The Cisco perimeter switch must be configured to block all outbound management traffic.
An XCCDF Rule
Description
<VulnDiscussion>For in-band management, the management network must have its own subnet in order to enforce control and access boundaries provided by Layer 3 network nodes, such as switches and firewalls. Management traffic between the managed network elements and the management network is routed via the same links and nodes as that used for production or operational traffic. Safeguards must be implemented to ensure that the management traffic does not leak past the perimeter of the managed network.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-221019r945857_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Configure the perimeter switch of the managed network with an outbound ACL on the egress interface to block all management traffic.
Step 1: Configure an ACL to block egress management traffic.
SW1(config)#ip access-list extended EXTERNAL_ACL_OUTBOUND
SW1(config-ext-nacl)#deny tcp any any eq tacacs log-input