I - Mission Critical Classified
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000148-L2S-000015
Group -
The Cisco switch must uniquely identify all network-connected endpoint devices before establishing any connection.
Controlling LAN access via 802.1x authentication can assist in preventing a malicious user from connecting an unauthorized PC to a switch port to inject or receive data from the network without det...Rule High Severity -
SRG-NET-000168-L2S-000019
Group -
The Cisco switch must authenticate all VLAN Trunk Protocol (VTP) messages with a hash function using the most secured cryptographic algorithm available.
VLAN Trunk Protocol (VTP) provides central management of VLAN domains, thus reducing administration in a switched network. When configuring a new VLAN on a VTP server, the VLAN is distributed throu...Rule Medium Severity -
SRG-NET-000331-L2S-000001
Group -
The Cisco switch must be configured for authorized users to select a user session to capture.
Without the capability to select a user session to capture/record or view/hear, investigations into suspicious or harmful events would be hampered by the volume of information captured. The volume ...Rule Medium Severity -
SRG-NET-000332-L2S-000002
Group -
The Cisco switch must be configured for authorized users to remotely view, in real time, all content related to an established user session from a component separate from The Cisco switch.
Without the capability to remotely view/hear all content related to a user session, investigations into suspicious user activity would be hampered. Real-time monitoring allows authorized personnel ...Rule Medium Severity -
SRG-NET-000343-L2S-000016
Group -
The Cisco switch must authenticate all endpoint devices before establishing any connection.
Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. For distributed architectures (e.g., service-oriented architectures), th...Rule Medium Severity -
SRG-NET-000362-L2S-000021
Group -
The Cisco switch must have Root Guard enabled on all switch ports connecting to access layer switches and hosts.
Spanning Tree Protocol (STP) does not provide any means for the network administrator to securely enforce the topology of the switched network. Any switch can be the root bridge in a network. Howev...Rule Low Severity -
SRG-NET-000362-L2S-000022
Group -
The Cisco switch must have BPDU Guard enabled on all user-facing or untrusted access switch ports.
If a rogue switch is introduced into the topology and transmits a Bridge Protocol Data Unit (BPDU) with a lower bridge priority than the existing root bridge, it will become the new root bridge and...Rule Medium Severity -
SRG-NET-000362-L2S-000023
Group -
The Cisco switch must have STP Loop Guard enabled.
The Spanning Tree Protocol (STP) loop guard feature provides additional protection against STP loops. An STP loop is created when an STP blocking port in a redundant topology erroneously transition...Rule Medium Severity -
SRG-NET-000362-L2S-000024
Group -
The Cisco switch must have Unknown Unicast Flood Blocking (UUFB) enabled.
Access layer switches use the Content Addressable Memory (CAM) table to direct traffic to specific ports based on the VLAN number and the destination MAC address of the frame. When a router has an ...Rule Medium Severity -
SRG-NET-000362-L2S-000025
Group -
The Cisco switch must have DHCP snooping for all user VLANs to validate DHCP messages from untrusted sources.
In an enterprise network, devices under administrative control are trusted sources. These devices include the switches, routers, and servers in the network. Host ports and unknown DHCP servers are ...Rule Medium Severity
Node 2
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