CCSM Advanced VPN Troubleshooting Practice Question
Which THREE conditions must be met for a successful Site-to-Site VPN tunnel establishment?
⚠ Common exam trap
Candidates often forget the necessity of the security policy, assuming that if IKE negotiations succeed, traffic will automatically pass without an explicit rule allowing the connection.
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
✓
Both peers must agree on IKE Phase 1 and Phase 2 proposals.
Site-to-site VPNs require agreement on cryptographic parameters for two phases of negotiation, matching identity and security policies, and connectivity between the peers. These three conditions represent the foundational requirements for the IKE protocol to function. If any of these items are misconfigured, the negotiation will inevitably fail, preventing the creation of the secure tunnel required for data transmission.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Both peers must agree on IKE Phase 1 and Phase 2 proposals.
Why this is correct
IKE Phase 1 establishes the secure channel for management, and Phase 2 defines the encryption for data. Both sides must agree on algorithms (AES, SHA, etc.) and DH groups to establish the Security Associations necessary for secure communication between the two gateways.
- ✓
The VPN Community must define the correct peer IP addresses and authentication methods.
Why this is correct
Correct peer identification is critical. The gateway must know the IP address of its partner and the authentication method (shared secret or certificate) to verify the peer's identity and initiate the tunnel, ensuring that only trusted gateways can build connections.
- ✓
The Security Policy must contain rules to allow traffic through the VPN tunnel.
Why this is correct
Even with an established tunnel, the Security Policy must explicitly allow the traffic flowing from the internal network to the remote network. If the policy drops the traffic, the VPN gateway will not attempt to encrypt the data, rendering the tunnel useless.
- ✗
The gateway must have a valid license for at least 1,000 concurrent tunnels.
Why it's wrong here
License limits vary and do not dictate the ability to establish a tunnel. While licensing is important for feature enablement, a single tunnel can be established on even the smallest gateway, provided the policy and cryptographic settings are correctly configured for that tunnel.
- ✗
Both peers must use the same vendor hardware for the VPN gateway.
Why it's wrong here
VPN tunnels use standardized protocols (IPsec/IKE) that are vendor-neutral. Provided the configuration parameters like encryption algorithms and DH groups are aligned, Check Point gateways can successfully establish tunnels with other vendors like Cisco or Juniper, making vendor homogeneity unnecessary for connectivity.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
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.