CCSM Advanced VPN Troubleshooting Practice Question
Users on a Check Point Remote Access VPN intermittently lose connectivity. The gateway logs show 'Phase 2 completion' followed shortly by 'rekey' messages, and the issue correlates with periods of high latency. Which Check Point setting should the administrator adjust to reduce the frequency of rekey-related drops on high-latency links?
⚠ Common exam trap
The trap here is treating rekey failures as a cryptographic mismatch and enabling PFS, which actually adds overhead and worsens the latency-sensitive behavior.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the Phase 1 and Phase 2 lifetimes in the VPN community properties
Frequent rekeys on a high-latency link increase the chance that a rekey exchange is delayed or lost, causing temporary SA gaps. Lengthening the Phase 1 and Phase 2 lifetimes in the VPN community properties reduces rekey frequency, giving the tunnel more time between renegotiations and smoothing over latency spikes without altering the security posture.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the IKE version from IKEv2 to IKEv1 for the community
Why it's wrong here
Downgrading to IKEv1 does not reduce rekey frequency and may remove IKEv2 features such as more efficient rekeying and MOBIKE. The problem is the interval between rekeys relative to link latency, not the IKE version in use.
- ✗
Disable Dead Peer Detection on the gateway
Why it's wrong here
Dead Peer Detection detects unreachable peers and can trigger tunnel teardown, but disabling it does not change how often SAs are rekeyed. The logs show successful Phase 2 completion followed by rekey activity, so DPD is not the source of the intermittent drops.
- ✗
Enable Perfect Forward Secrecy for Phase 2 in the community
Why it's wrong here
Enabling PFS adds an extra Diffie-Hellman exchange during each rekey, increasing the number of round trips and the sensitivity to latency. On a high-latency link this would make rekey failures more likely, not less, so it does not address the reported symptom.
- ✓
Increase the Phase 1 and Phase 2 lifetimes in the VPN community properties
Why this is correct
Extending the IKE and IPsec SA lifetimes reduces how often rekey exchanges occur, which lowers the chance that a rekey is lost or delayed on a high-latency link. This directly addresses the correlation between frequent rekeys and intermittent drops without weakening the encryption itself.
About these practice questions
This CCSM question is part of Courseiva's 219-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Check Point exam blueprint
This CCSM practice question is part of Courseiva's free Check Point certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CCSM exam.