Bob is asked by Alice to disable the SecureXL mechanism temporary tor further diagnostic by...

You can disable the SecureXL mechanism temporarily for further diagnostic by running fwaccel off on the Security Gateway1. This command disables SecureXL, which is an acceleration solution that maximizes the performance of the Firewall by offloading CPU-intensive operations to the SecureXL device2. Disabling SecureXL can help you troubleshoot connectivity or policy issues, as it forces all traffic to go through the Firewall kernel and bypass the SecureXL device1. To run this command, you need to access the Security Gateway in expert mode and run fwaccel off1. To enable SecureXL again, you can run fwaccel on1. Note that disabling SecureXL may affect the performance of the Security Gateway, so use it with caution and only when necessary1.

References: How to enable/disable Check Point SecureXL via CLI - Check Point Software, SecureXL - Check Point Software