HPE Network Security Associate (HPE6-A78)Demo

The local admin/root account should have a long, complex, randomly generated password that is securely stored and unavailable to ordinary users. This prevents misuse of the local administrative account while centralized TACACS or RADIUS authentication is used for normal administrative access.

An “unknown NAD” RADIUS event means ClearPass cannot associate the incoming RADIUS request with a configured network access device. The Mobility Controller’s source IP address for traffic to ClearPass must therefore match the IP address configured for that device in ClearPass.

In ArubaOS, an authenticated client is assigned a user role that determines its network privileges, and one or more firewall policies can be associated with that role. Assigning distinct faculty and student roles enables the controller to enforce the appropriate traffic rules per authenticated user group, independent of VLAN or WLAN membership.

ClearPass Policy Manager can fingerprint an endpoint from DHCP Discover and Request attributes, including the ordered parameter-request list in DHCP Option 55. That fingerprint can identify characteristics such as the device category, OS family, and device name.

OWE provides automatic, individualized encryption for an otherwise open wireless network, reducing the risk that nearby parties can passively eavesdrop on client traffic. It does not authenticate users or control who may join the network.

An Aruba-User-Role VSA in a RADIUS Access-Accept assigns the returned role to the authenticated client, so Client1 receives role4. An auth-role is used only when RADIUS does not assign a specific role. A client whose authentication is still in progress receives the configured preauth-role; therefore, Client2 receives role2 until it authenticates or fails authentication.

When CPsec is enabled and automatic certificate provisioning is disabled, valid APs must be explicitly added to and approved on the campus AP whitelist. This authorizes them for certificate provisioning and secure controller management.

The 802.1X default role configured in the AAA profile is assigned after successful 802.1X authentication when the authentication server does not return an Aruba-User-Role VSA. A returned role VSA is used for role assignment instead; authentication-server contact failures and 802.1X timeouts are not successful authentications that invoke the configured 802.1X default role.

AOS-CX event-log commands support -c to restrict output to a specified event category and -r to show the newest entries first. Filtering on port-access and reversing the order makes recent port-authentication events easier to find in logs that have already been recorded.

ClearPass Policy Manager Network Scan discovers and profiles endpoints and network devices by querying seed and discovered devices through SNMP. Configuring SNMPv3 users on the AOS-CX switches with credentials that match the SNMPv3 credentials configured in ClearPass allows ClearPass to authenticate to the switches and retrieve the required discovery information.

HPE Aruba Networking ClearPass Device Insight continuously discovers, profiles, and classifies connected endpoints through device attributes, communication behavior, and machine learning. Its capabilities are particularly valuable for accurately identifying diverse and headless device types, including IoT devices.

ArubaOS firewall policies evaluate rules in order, with the first matching rule determining the action. Both addresses are in the 10.1.0.0/16 network, neither is in 10.1.1.0/24, and HTTPS does not match the DNS-only permit. Consequently, each flow matches the HTTPS deny_opt rule before it can reach the final permit rule.

HPE Aruba Networking ClearPass Device Insight automatically discovers, fingerprints, and identifies network-connected devices using machine learning, including difficult-to-detect IoT endpoints. This provides the required broad device classification capability.

Rootkits are designed to operate with high-level system privileges and to evade detection by concealing their files, processes, services, or other malicious activity. Microsoft documents that rootkits intercept and alter standard operating-system processes to hide themselves and their activity.

RadSec secures communication between the switch and the RADIUS server with mutually authenticated TLS. The switch, acting as the RadSec client, uses a local or configured leaf certificate; the inner 802.1X method, including EAP-TLS, does not change that RadSec certificate requirement.

A successful ping confirms IP reachability but does not confirm that RADIUS requests are reaching and being accepted by ClearPass. When an expected request is absent from Access Tracker, ClearPass Event Viewer can expose relevant communication or configuration errors, such as an unrecognized network device or shared-secret mismatch, that occur before a normal authentication transaction is recorded.

WPA3-Personal uses Simultaneous Authentication of Equals (SAE), which provides forward secrecy by deriving distinct session keys. Compromise or knowledge of the shared WLAN passphrase does not let someone decrypt other users’ captured wireless sessions. Cisco documents WPA3-Personal SAE as providing forward secrecy.

TLS establishes a secure, authenticated communication channel between a client and server that can protect another application protocol, such as HTTP. Its handshake negotiates security parameters and keys before application data is exchanged.

A RADIUS-returned user role is applied only when that role exists on the network device. Because accountants is not a configured role, the dynamically assigned role cannot be used and the WLAN’s configured default role applies. That default role is denyall.

The detecting devices are the Aruba APs or air monitors that observed the rogue radio. Identifying those devices provides known reference locations and detection signal data that can be used to trace or triangulate the rogue device’s physical position. Aruba documentation records the device that detected a rogue AP and describes location estimation for rogue targets through triangulation.

Dynamic ARP Inspection is enabled on a per-VLAN basis and checks ARP received on untrusted ports against the DHCP snooping binding table. End-user ports should remain untrusted so forged ARP packets are rejected, while the uplink to Switch-1 is trusted to allow legitimate upstream ARP traffic. Thus, ARP inspection must be enabled for VLAN 201 on Switch-2 and its Switch-1 uplink must be trusted.

Passive endpoint classification identifies endpoints by observing traffic they generate as part of normal operation, whereas active endpoint classification sends requests or probes to endpoints to obtain identifying information.

The certificate’s DNS SAN is myhost.example.com, not the accessed hostname myhost1.example.com. TLS service identity validation uses the DNS name in the subjectAltName extension; the subject name does not make a mismatching DNS SAN valid. Server authentication is the appropriate EKU, and the supplied MyCA_Signing intermediate chains to the trusted MyCA root, so the absence of MyCA_Issuing does not prevent path validation.