PCNSE Exam Dumps - Paloalto Networks Palo Alto Certifications and Accreditations Questions and Answers

https://docs.paloaltonetworks.com/pan-os/11-0/pan-os-new-features/networking-features/ipsec-transport-mode

The linked documentation outlines new features for IPSec transport mode in PAN-OS 11.0 and clarifies the requirements for configuring IPSec in transport mode. Based on this:

Auto-Generated Key:

The documentation specifies that IPSec in transport mode requires an auto-generated key during the IKE negotiation process. This ensures the integrity and encryption of the communication channel.

Verdict: Correct.

NAT Traversal:

NAT Traversal is only relevant when NAT is present between the IPSec peers. It is not an inherent requirement for IPSec transport mode.

Verdict: Not correct.

IKEv1:

While IKE (v1 or v2) is required for IPSec, the question specifically asks for transport mode requirements, and IKEv1 is not listed as a strict transport mode requirement in the documentation.

Verdict: Not correct.

DH-group 20 (ECP-384 bits):

The documentation mentions that DH-group 20 (Elliptic Curve Protocol, 384-bit) is one of the required Diffie-Hellman groups for transport mode. This ensures secure key exchange.

Verdict: Correct.

Correct Answer

Based on the documentation: A. Auto Generated Key

D. DH-group 20 (ECP-384 bits)

Why This Answer is Correct

Auto-generated key is fundamental to secure communication in transport mode, as stated in the PAN-OS 11.0 documentation.

DH-group 20 ensures a high level of cryptographic strength for key exchange, making it a specific requirement for transport mode in this context.

Reference

For more details, refer to the PAN-OS 11.0 IPSec Transport Mode documentation: IPSec Transport Mode

The timer that determines the frequency between packets sent to verify that the HA functionality on the other HA firewall is operational is the Hello Interval. The Hello Interval is the interval in milliseconds between hello packets that are sent to check the HA status of the peer firewall. The default value for the Hello Interval is 8000 ms for all platforms, and the range is 8000-60000 ms. If the firewall does not receive a hello packet from its peer within the specified interval, it will declare the peer as failed and initiate a failover12. References: HA Timers, Layer 3 High Availability with Optimal Failover Times Best Practices

To apply tags automatically based on User-ID logs, the engineer must configure a Log Forwarding profile that specifies the criteria for matching the logs and the tags to apply. The Log Forwarding profile can be attached to a security policy rule or a decryption policy rule to enable auto-tagging for the traffic that matches the rule. The tags can then be used for dynamic address groups, policy enforcement, or reporting1. References: Use Auto-Tagging to Automate Security Actions, PCNSE Study Guide (page 49)

The SSL Forward Proxy rule type is designed to control and inspect SSL traffic from internal users to external websites. When an internal user attempts to access an HTTPS site, the Palo Alto Networks firewall, acting as an SSL Forward Proxy, intercepts the SSL request. It then establishes an SSL connection with the requested website on behalf of the user. Simultaneously, the firewall establishes a separate SSL connection with the user. This setup allows the firewall to decrypt and inspect the traffic for threats and compliance with security policies before re-encrypting and forwarding the traffic to its destination.

This process is transparent to the end user and ensures that potentially harmful content delivered over encrypted SSL connections can be identified and blocked. SSL Forward Proxy is a critical component of a comprehensive security strategy, allowing organizations to enforce security policies and protect against threats in encrypted traffic.

To collect User-ID information from third-party proxies, Palo Alto Networks supports several methods of integrating user information. Syslog parsing allows the firewall to receive syslog messages from external services, parse them, and extract user information. X-Forwarded-For (XFF) headers, which are used in HTTP requests and proxies, can carry the original IP address of a client connecting through a proxy, and this information can be used by the firewall to map the user IDs.

Syslog is commonly used for integrating third-party devices like proxies with User-ID, and XFF headers are specifically mentioned in the context of integrating user mappings from HTTP traffic. Client probing and Server Monitoring are not the correct methods for pulling data from third-party proxies.

For further details, refer to the Palo Alto Networks documentation on User-ID integration and the "PAN-OS® Administrator’s Guide".

To enable XML API access to a firewall for automation from a network segment routed through a Layer 3 sub-interface, the most straightforward approach is to use an Interface Management profile.

C. This can be achieved by:

Configuring an Interface Management profile and enabling HTTPS access on it. This profile defines management services that are permitted on the interface, including HTTPS, which is required for XML API access.

Applying this Interface Management profile to the desired Layer 3 sub-interface. This action enables HTTPS access (and thus XML API access) on the sub-interface, allowing devices on the connected network segment to communicate with the firewall for automation purposes.

This solution allows for the secure extension of management capabilities to network segments without direct access to the dedicated management interface, facilitating automation and operational efficiency without necessitating changes to existing access configurations.

https://www.paloaltonetworks.com/content/dam/pan/en_US/assets/pdf/datasheets/education/pcnse-study-guide.pdf page 83