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Palo Alto Networks Network Security Analyst 認定 NetSec-Analyst 試験問題:

1. A large financial institution uses Panorama to manage their firewall estate. They are implementing a strict change management process where all policy modifications, object creations, or deletions must be reviewed and approved before being committed and pushed. They want to ensure that only approved changes are present in the 'candidate config' before a commit, and that deviations are easily identifiable. Which Panorama feature, when combined with a robust operational process, helps enforce this requirement and identify discrepancies?

A) Leverage the 'Validate' function before committing to check for syntax errors, combined with regular 'Config Audits' and comparing the running configuration with a golden configuration stored externally.
B) Regularly export the candidate configuration (XML) and compare it against a baseline configuration using an external diff tool, then use 'Load Named Configuration' if a rollback is needed.
C) Utilize 'Admin Roles' to restrict non-approved users from making any changes to the candidate configuration.
D) Implement 'Config Locks' before making changes, ensuring only one administrator can modify the configuration at a time.
E) Use 'Shared Policy' and 'Device Group Policy' hierarchies effectively, combined with the 'Revert' option for the candidate configuration if unapproved changes are found.

2. Consider a scenario where an organization wants to enforce strict application control based on custom HTTP headers that are added by their internal proxy for specific application traffic. They need to allow traffic only if a particular custom header with a specific value is present. How would a Palo Alto Networks firewall be configured to achieve this granular application enforcement?

A) Utilize 'Content-ID' with 'Predefined Signatures' to inspect the HTTP header and create a 'Security Policy' to block or allow based on this inspection.
B) Develop a 'Custom Vulnerability Protection Signature' using the 'Vulnerability Protection' profile to detect the HTTP header and then apply an 'Allow' action.
C) Define a 'Custom Application' by selecting the base application (e.g., web-browsing) and then adding an 'Application Signature' with a 'Pattern' that uses regular expressions to match the specific HTTP header and its value. This custom application is then used in a security policy.
D) Create a 'Custom Application' with a 'Signature' matching the HTTP header and value. Then, apply this custom application in a security policy with an 'Allow' action.
E) Configure a 'URL Filtering' profile with a custom category for the header and apply it to a security policy.

3. An organization is deploying a new custom application that runs over QUIC (Quick UDP Internet Connections) protocol, primarily for performance reasons. The firewall team needs to create a security policy to allow this application while ensuring it adheres to content inspection requirements, including SSL decryption. Currently, the firewall's default settings block unknown UDP traffic. Which configuration steps are necessary for the Palo Alto Networks firewall to successfully identify, decrypt, and apply content-ID to this QUIC application?

A) QUIC traffic uses a different handshaking mechanism than traditional SSL/TLS over TCP, making direct SSL decryption challenging for the firewall's standard SSL Proxy. The best approach is to use an Application Override for the QUIC traffic to identify it, then apply a specific Content-ID profile that bypasses SSL decryption but focuses on other threat prevention aspects. A Security Policy rule allowing this traffic is also needed.
B) Create a Custom Application for QUIC traffic specifying UDP port. Create a Security Policy rule allowing this custom application. Configure an SSL Decryption Policy for this traffic. Apply relevant Content-ID profiles.
C) Upgrade the PAN-OS to the latest version which has native support for QUIC decryption. Then, create a Security Policy rule allowing the 'quic' application and apply an SSL Decryption Profile along with Content-ID profiles. If the application is custom, a Custom App-ID might still be required.
D) QUIC traffic, by its nature, integrates encryption directly at the transport layer. While a custom App-ID can identify it (if supported by signatures or application override), standard SSL decryption profiles designed for TCP-based SSL/TLS will not function directly on QUIC. A Security Policy rule allowing the custom App-Ld (or the 'quic' App-ID if recognized by the firewall) with appropriate Content-ID profiles (Antivirus, Anti-Spyware, WildFire) is required, but explicit SSL Decryption is generally not applied in the same manner as TCP.
E) QUIC is UDP-based; therefore, SSL decryption is not applicable. Create a Custom Application for QUIC traffic specifying UDP port. Create a Security Policy rule allowing this custom application. Apply relevant Content-ID profiles without SSL decryption.

4. An internal web application, 'AppX', uses SSL with client certificates for mutual authentication. Users are complaining that they cannot access 'APPX' when SSL Inbound Inspection is enabled on the Palo Alto Networks firewall. The firewall logs indicate 'decryption-failure' with reason 'client-certificate-required'. Which specific configuration adjustment to the SSL Inbound Inspection profile applied to 'APPX' would resolve this issue without compromising the mutual authentication requirement?

A) Import the client certificates into the firewall's trusted certificate store.
B) In the SSL Inbound Inspection profile, under 'SSL Protocol Settings', change 'Unsupported SSL Version' to 'Allow'.
C) In the SSL Inbound Inspection profile, under 'SSL Protocol Settings', enable 'Forward Client Certificate' and ensure the firewall's certificate is trusted by AppX.
D) Disable 'Block Session on Unsupported Cipher' in the SSL Inbound Inspection profile.
E) Disable SSL Inbound Inspection for traffic destined to 'AppX'.

5. A Palo Alto Networks firewall is configured with Decryption profiles, and you are troubleshooting a web application access issue for a specific user group. The application intermittently fails to load, and the firewall logs show 'client-certificate-untrusted' decryption errors for connections from this group. You've confirmed the web application's certificate is issued by a publicly trusted CA. Which of the following is the MOST LIKELY cause of this error, and what configuration element needs immediate investigation?

A) The 'Decryption Profile' applied to the Decryption Policy has 'Block sessions with untrusted certificates' enabled, and the web server's certificate is not trusted by the firewall. Review 'Objects > Decryption Profile > <Decryption Profile> > SSL Forward Proxy > Block sessions with untrusted certificates'.
B) The web application is using client-side certificates for authentication, and the firewall is configured for 'SSL Forward Proxy' decryption, which is stripping the client certificate. Review 'Policies > Decryption > <Decryption Policy>' to change action to 'No Decryption' for this traffic.
C) The firewall's decryption certificate chain is incomplete or not trusted by the client. Review 'Device > Certificate Management > Certificates' to ensure the firewall's decryption certificate and its issuing CA are imported and trusted by the client.
D) The web application requires 'SSL Inbound Inspection' decryption, but the firewall is incorrectly configured for 'SSL Forward Proxy' decryption for this traffic. Review 'Policies > Decryption > <Decryption Policy>' action.
E) The GlobalProtect VPN client is not configured to trust the firewall's decryption certificate, causing the client to reject the connection. Review 'Device > GlobalProtect > Portals > <Portal Name> > Agent > Client Settings > Certificate Profile'.

質問と回答：