The correct statement explaining the differences between the two procedures for debugging in the firewall kernel is D. (i) is used for general debugging, has a small buffer and is a quick way to set kernel debug flags to get an output via command line whereas (ii) is useful when there is a need for detailed debugging and requires additional steps to set the buffer and get an output via command line.
The command fw ctl zdebug is a shortcut command that sets the kernel debug flags to a predefined value and prints the debug output to the standard output. It is useful for general debugging of common issues, such as traffic drops, NAT, VPN, or clustering. It has a small buffer size and does not require additional steps to start or stop the debugging. However, it has some limitations, such as it cannot be used with SecureXL, it cannot filter the output by chain modules, and it cannot save the output to a file12.
The command fw ctl debug is a command that allows the administrator to set the kernel debug flags to a custom value and specify the chain modules to debug. It is useful for detailed debugging of specific issues, such as policy installation, CoreXL, or Identity Awareness. It has a larger buffer size and can save the output to a file. However, it requires additional steps to start and stop thedebugging, such as setting the buffer size, clearing the buffer, dumping the buffer, and resetting the debug flags12.
The command fw ctl kdebug is a command that is used in conjunction with fw ctl debug to dump the kernel debug buffer to the standard output or to a file. It is part of the procedure (ii) for detailed debugging in the firewall kernel12.
The other statements are not correct or relevant for explaining the differences between the two procedures for debugging in the firewall kernel. The command fw ctl zdebug can be used to debug more than just the access control policy, and the command fw ctl debug/kdebug can be used to debug more than just the unified policy. Both commands can be used on both the Security Gateway and the Security Management Server, depending on the issue to be debugged12.
[: Check Point Processes and Daemons3, (CCTE) - Check Point Software2, 1: https://sc1.checkpoint.com/documents/R81.10/WebAdminGuides/EN/CP_R81.10_AdvancedTechnicalReferenceGuide/html_frameset.htm 2: https://www.checkpoint.com/downloads/training/DOC-Training-Data-Sheet-CCTE-R81.10-V1.0.pdf 3: https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk97638, , , ]
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