PCNSE Exam Dumps - Palo Alto Networks Certified Security Engineer (PCNSE) PAN-OS 11.0

Quantum-related attack protection requires cryptography resistant to quantum computing, such as post-quantum algorithms. In PAN-OS 11.2, IKEv2 with Hybrid Key Exchange (Option B) combines classical and quantum-resistant algorithms for key exchange, enhancing VPN security. IKEv2 with Post-Quantum Pre-shared Keys (PPK) (Option C) uses pre-shared keys designed to resist quantum attacks, supported in IKEv2 configurations.

Option A (IKEv1 only) weakens security by avoiding PFS and modern cryptography. Option D (IPsec with Hybrid ID exchange) is not a valid PAN-OS feature. Documentation confirms IKEv2 enhancements for quantum resistance.

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".

Policy-Based Forwarding (PBF) on Palo Alto Networks firewalls allows administrators to define forwarding decisions based on criteria other than the destination IP address, such as the application, source address, or user. It can address scenarios like:

A. Routing FTP to a backup ISP link to save bandwidth on the primary ISP link: PBF can be configured to identify FTP traffic and route it through a different ISP, preserving bandwidth on the primary link for other critical applications.

B. Providing application connectivity when the primary circuit fails: PBF can be used for failover purposes, directing traffic to an alternate path if the primary connection goes down, ensuring continuous application availability.

PBF is not designed to bypass Layer 7 inspection or forward traffic based solely on source port, as these tasks are managed through different mechanisms within the firewall's operating system.

When sizing a decryption firewall deployment, two factors that should be considered are the encryption algorithm and the TLS protocol version. These factors affect the amount of resources and processing power that the firewall needs to decrypt and inspect SSL/TLS traffic.

The encryption algorithm is the method that the server and the client use to encrypt and decrypt the data exchanged in an SSL/TLS session. Different encryption algorithms have different levels of security and performance. For example, AES is a symmetric encryption algorithm that is faster and more efficient than RSA, which is an asymmetric encryption algorithm. However, RSA is more secure than AES because it uses public and private keys to encrypt and decrypt data, while AES uses a single shared key. The firewall must support the encryption algorithms that are used by the servers and clients that it decrypts, and it must have enough CPU and memory resources to handle the decryption workload12.

The TLS protocol version is the standard that defines how the server and the client establish and maintain an SSL/TLS session. Different TLS protocol versions have different features and requirements for encryption algorithms, cipher suites, certificates, handshake messages, etc. For example, TLS 1.3 is the latest and most secure version of TLS, which supports only strong encryption algorithms and cipher suites, such as AES-GCM and ChaCha20-Poly1305, and requires elliptic curve certificates. The firewall must support the TLS protocol versions that are used by the servers and clients that it decrypts, and it must have enough hardware acceleration resources to handle the decryption speed34.

The number of security zones in decryption policies and the number of blocked sessions are not relevant factors for sizing a decryption firewall deployment. The number of security zones in decryption policies only affects how the firewall matches traffic to decryption rules based on source and destination zones, but it does not affect the decryption performance or resource consumption. The number of blocked sessions only indicates how many sessions are denied by the firewall based on security policy or decryption policy rules, but it does not affect the decryption capacity or throughput56.

 Encryption Algorithms, TLS Protocol Versions, Decryption Policy, PCNSE Study Guide (page 60)

https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-web-interface-help/policies/policies-application-override

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