You want to fully investigate the VPN establishment, what will you do?

Question

Options

• Avpn debug and use IKEview
• Bdebug FWD because VPND Is child process
• Cuse vpn tu command and use option 8 to start debug
• Duse kernel debug with fw ctl debug -m VPN all

• A
  77% (27)
• B
  3% (1)
• C
  6% (2)
• D
  14% (5)

Explanation

Option A is correct because vpn debug captures the full IKE Phase 1 and Phase 2 negotiation logs on Check Point firewalls, and IKEview is the purpose-built parser that renders those raw logs into a human-readable, color-coded format - giving you complete visibility into every step of VPN establishment.

Why the distractors fail:

• B is wrong on two counts: VPND is an independent daemon, not a child of FWD, and debugging FWD gives you firewall policy inspection, not IKE negotiation details.
• C is wrong because vpn tu (Tunnel Utility) is a management tool for listing, deleting, or resetting tunnels - not a diagnostic tool for tracing establishment failures.
• D is wrong because fw ctl debug -m VPN all is a kernel-level debug that floods output with low-level data; it's a last resort for deep packet issues, not the standard approach for investigating IKE handshakes.

Memory tip: Match the tool to the layer - IKE lives in the VPN daemon, so use vpn debug (daemon-level) + IKEview (reader). Kernel debug (fw ctl) is for the kernel layer; tunnel utility (vpn tu) is for operational management. Right problem → right layer → right tool.

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