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Juniper EX Series Switches Layer 2 Switch Security Technical Implementation Guide

Version

V2R4

Release Date

Dec 10, 2025

SCAP Benchmark ID

Juniper_EX_L2S_STIG

Total Checks

24

Tags

network
CAT I: 2CAT II: 18CAT III: 4

This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.

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Checks (24)

V-253948HIGHThe Juniper EX switch must be configured to disable non-essential capabilities.V-253949HIGHThe Juniper EX switch must be configured to uniquely identify all network-connected endpoint devices before establishing any connection.V-253950MEDIUMThe Juniper layer 2 switch must be configured to disable all dynamic VLAN registration protocols.V-253951MEDIUMThe Juniper EX switch must be configured to manage excess bandwidth to limit the effects of packet flooding types of denial-of-service (DoS) attacks.V-253952MEDIUMThe Juniper EX switch must be configured to permit authorized users to select a user session to capture.V-253953MEDIUMThe Juniper EX switch must be configured to permit authorized users to remotely view, in real time, all content related to an established user session from a component separate from the layer 2 switch.V-253954MEDIUMThe Juniper EX switch must be configured to authenticate all network-connected endpoint devices before establishing any connection.V-253955LOWThe Juniper EX switch must be configured to enable Root Protection on STP switch ports connecting to access layer switches.V-253956MEDIUMThe Juniper EX switch must be configured to enable BPDU Protection on all user-facing or untrusted access switch ports.V-253957MEDIUMThe Juniper EX switch must be configured to enable STP Loop Protection on all non-designated STP switch ports.V-253959MEDIUMThe Juniper EX switch must be configured to enable DHCP snooping for all user VLANs to validate DHCP messages from untrusted sources.V-253960MEDIUMThe Juniper EX switch must be configured to enable IP Source Guard on all user-facing or untrusted access VLANs.V-253961MEDIUMThe Juniper EX switch must be configured to enable Dynamic Address Resolution Protocol (ARP) Inspection (DAI) on all user VLANs.V-253962LOWThe Juniper EX switch must be configured to enable Storm Control on all host-facing access interfaces.V-253963LOWThe Juniper EX switch must be configured to enable IGMP or MLD Snooping on all VLANs.V-253964MEDIUMIf STP is used, the Juniper EX switch must be configured to implement Rapid STP, or Multiple STP, where VLANs span multiple switches with redundant links.V-253965MEDIUMThe Juniper EX switch must be configured to verify two-way connectivity on all interswitch trunked interfaces.V-253966MEDIUMThe Juniper EX switch must be configured to assign all explicitly disabled access interfaces to an unused VLAN.V-253967MEDIUMThe Juniper EX switch must not be configured with VLANs used for L2 control traffic assigned to any host-facing access interface.V-253968MEDIUMThe Juniper EX switch must be configured to prune the default VLAN from all trunked interfaces that do not require it.V-253969MEDIUMThe Juniper EX switch must not use the default VLAN for management traffic.V-253970MEDIUMThe Juniper EX switch must be configured to set all enabled user-facing or untrusted ports as access interfaces.V-253971MEDIUMThe Juniper EX switch must not have a native VLAN ID assigned, or have a unique native VLAN ID, for all 802.1q trunk links.V-253972LOWThe Juniper EX switch must not have any access interfaces assigned to a VLAN configured as native for any trunked interface.