Pearson 156-315.81 New Attempt

When an encrypted packet is received by a Check Point Security Gateway, it is decrypted according to the security policy. The security policy defines the rules and settings for encryption and decryption of traffic, such as the encryption algorithm, the encryption domain, the pre-shared secret or certificate, etc. The security policy is enforced by the Firewall kernel, which is responsible for decrypting the packets before passing them to the inbound chain for further inspection. The inbound chain consists of various inspection modules that apply security checks and actions on the decrypted packets. The outbound chain is the reverse process, where the packets are inspected and then encrypted according to the security policy before being sent out.

References: Check Point Firewall Security Solution, Check Point R81 Cyber Security Platform, Check Point VPN Administration Guide R81

 CPUSE offline upgrade is the best upgrade method when the management server is not connected to the Internet. CPUSE (Check Point Upgrade Service Engine) is a tool that automates the process of upgrading and installing software packages on Check Point devices. CPUSE can work in online mode or offline mode. Online mode requires an Internet connection to download the packages from Check Point servers. Offline mode allows you to download the packages manually from another device and transfer them to the management server using a USB drive or SCP. References: Check Point Security Expert R81 Course, CPUSE Administration Guide

 A best practice before starting to troubleshoot using the fw monitor tool is to disable SecureXL. SecureXL is a performance acceleration solution that optimizes the packet flow through the Security Gateway. However, SecureXL can also bypass some inspection points and cause some packets to be invisible to fw monitor. Therefore, disabling SecureXL can ensure that fw monitor captures all the relevant packets for troubleshooting purposes. References: Check Point Security Expert R81 Course, fw monitor, SecureXL

CoreXL is a performance-enhancing technology that enables the processing CPU cores to concurrently perform multiple tasks on Security Gateways with multiple CPU cores. CoreXL replicates the Firewall kernel multiple times, creating multiple Firewall instances that run on different CPU cores. These Firewall instances handle traffic concurrently, and each Firewall instance is a complete and independent Firewall inspection kernel. To show the current connections distributed by CoreXL FW instances, you can use the command fw ctl multik stat on the Security Gateway. This command will display information such as the number of connections, packets, bytes, drops, and errors handled by each CoreXL FW instance, as well as the CPU utilization and affinity of each instance. The other options are not correct because:

• B. fw ctl affinity -l: This command will show the CPU affinity of all processes and IRQs on the Security Gateway. It will not show the current connections distributed by CoreXL FW instances.
• C. fw ctl instances -v: This command will show the details of all CoreXL FW instances on the Security Gateway, such as their ID, type, state, priority, and interfaces. It will not show the current connections distributed by CoreXL FW instances.
• D. fw ctl iflist: This command will show the list of all interfaces on the Security Gateway, along with their names

References: Part 3 - SecureXL, What is CoreXL & SecureXL, SecureXL Fast Accelerator (fw fast_accel) for R80.20 and above