Palo Alto Networks PCNSE Practice Test - Questions Answers, Page 36

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Based on the snippet of the WildFire submission log provided, it appears that the end user was able to successfully download a file. The key indicator here is that the final action for the web-browsing application and the flash file is set to ''allow.'' This means that despite any alerts or other actions taken earlier in the process, the ultimate decision was to allow the file to be downloaded.

The two key exchange algorithms that consume the most resources when decrypting SSL traffic are ECDHE and DHE. These are both Diffie-Hellman based algorithms that enable perfect forward secrecy (PFS), which means that they generate a new and unique session key for each SSL/TLS session, and do not reuse any previous keys. This enhances the security of the encrypted communication, but also increases the computational cost and complexity of the key exchange process. ECDHE stands for Elliptic Curve Diffie-Hellman Ephemeral, which uses elliptic curve cryptography (ECC) to generate the session key. DHE stands for Diffie-Hellman Ephemeral, which uses modular arithmetic to generate the session key.Both ECDHE and DHE require more CPU and memory resources than RSA, which is a non-PFS algorithm that uses public and private keys to encrypt and decrypt the session key123.Reference:Key Exchange Algorithms,Best Practices for Enabling SSL Decryption, PCNSE Study Guide (page 60)

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To override a device and network setting applied by a template, you can either configure the setting locally on the firewall or override the setting on the template stack. Configuring the setting locally on the firewall will copy the setting to the local configuration of the device and will no longer be controlled by the template. Overriding the setting on the template stack will apply the setting to all the firewalls that are assigned to the template stack, unless the setting is also overridden locally on a firewall. Changing the setting on the global template will affect all the firewalls that inherit the setting from the template, which is not desirable in this scenario. Configuring a service route for DNS on a different interface will not change the DNS server address, but only the interface that the firewall uses to reach the DNS server.Reference:

Override a Template Setting

How to override panorama pushed template configuration on the local firewall

Overriding Panorama Template settings

If an administrator wants to apply QoS to traffic based on source, they must specify the post-NAT source address in a QoS policy rule. This is because QoS is enforced on traffic as it egresses the firewall, and the firewall applies NAT rules before QoS rules. Therefore, the firewall will match the QoS policy rule based on the translated source address, not the original source address. If the administrator uses the pre-NAT source address in the QoS policy rule, the firewall will not be able to identify the traffic correctly and apply the desired QoS treatment.Reference:

QoS Policy

Configure QoS

The engineer is configuring a DoS Protection profile to defend specific endpoints and resources against malicious activity. A DoS Protection profile is a feature that enables the firewall to detect and prevent denial-of-service (DoS) attacks that attempt to overwhelm network resources or disrupt services. A DoS Protection profile can provide granular defense against targeted flood attacks for specific critical systems that are accessed by users from the internet, such as web servers, DNS servers, or VPN gateways.A DoS Protection profile can be applied to a security policy rule that matches the traffic to and from the protected systems, and can specify the thresholds and actions for different types of flood attacks, such as SYN, UDP, ICMP, or other IP floods12.Reference:DoS Protection, PCNSE Study Guide (page 58)

In an active/active high availability (HA) firewall pair, when a firewall experiences a failure of a monitored path, it enters the ''Tentative'' state1. This state indicates that the firewall is synchronizing sessions and configurations from its peer due to a failure or a change in monitored objects such as a link or path. The firewall in this state is not fully functional but is working towards resuming normal operations by syncing with its peer. Therefore, the correct answer is B. Tentative.

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The Palo Alto Networks Best Practices for Anti-Spyware Profiles recommend enabling single-packet captures (PCAP) for medium, high, and critical severity threats. This allows for capturing the first packet of the malicious traffic for further analysis and investigation.PCAP should not be enabled for low and informational severity threats, as they generate a relatively high volume of traffic and are not particularly useful compared to potential threats2.Reference:Create the Data Center Best Practice Anti-Spyware Profile,Security Profile: Anti-Spyware, PCNSE Study Guide (page 57)