The two procedures available for debugging in the firewall kernel are

Question

Options

• A(i) is used to debug only issues related to dropping of traffic, however (ii) can be used for any
• B(i) is used to debug the access control policy only, however (ii) can be used to debug a unified
• C(i) is used on a Security Gateway, whereas (ii) is used on a Security Management Server
• D(i) is used for general debugging, has a small buffer and is a quick way to set kernel debug flags
• Ifw ctl zdebug

• B
  4% (1)
• D
  89% (24)
• I
  7% (2)

Explanation

Option D correctly describes fw ctl zdebug (procedure i) as a general-purpose kernel debug tool with a small, circular buffer - it's designed for quick, on-the-fly capture of kernel debug output by setting flags and immediately streaming results, making it the go-to for fast triage.

Why the distractors are wrong:

• A is incorrect because fw ctl zdebug is not limited to dropped-traffic issues - it captures general kernel debug output for any flagged module.
• B is incorrect because neither tool is restricted to "access control policy only"; both operate at the kernel level, not the policy-compilation level.
• C is incorrect because both tools run on a Security Gateway (where the kernel resides); this is not a Gateway-vs-Management-Server distinction.

Memory tip: Think of the "z" in zdebug as "zero setup" - it's the zero-friction, quick-and-dirty debug method with a small buffer, while fw ctl debug (procedure ii) is the fuller, more configurable option you'd use for deeper investigation.

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