CCSM Advanced Firewall Troubleshooting Practice Question
A Security Gateway is configured with a large number of rules and NAT policies. Users report that connections to a specific internal server are being accepted but then immediately reset. The administrator runs 'fw monitor -e "accept src=192.168.1.100 and dst=10.0.0.50;"' and sees the packets leaving the firewall, but no return traffic. Which advanced troubleshooting step should the administrator perform NEXT to determine if the issue is related to asymmetric routing or state synchronization?
⚠ Common exam trap
The trap here is assuming that packet capture alone will reveal the cause, when in a cluster, state synchronization issues can cause silent resets that are not evident from packet traces alone.
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
✓
Check the cluster state synchronization status with 'cphaprob syncstat'.
The symptoms suggest a possible cluster state synchronization issue, where return traffic is processed by a different member without the connection state. The 'cphaprob syncstat' command provides detailed synchronization statistics, helping identify if connections are out of sync. Asymmetric routing could also cause this, but the cluster context makes sync status a critical check. The other options are either less specific or do not directly address the suspected causes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Check the cluster state synchronization status with 'cphaprob syncstat'.
Why this is correct
The 'cphaprob syncstat' command displays the synchronization status between cluster members, including the number of unsynchronized connections. If state synchronization is failing, return traffic might be handled by a different cluster member that lacks the connection state, leading to resets. This directly addresses the possibility of state synchronization issues, which is one of the suspected causes. It is an advanced step that provides specific insight into cluster health.
- ✗
Run 'fw ctl zdebug drop' to check for drops in the kernel.
Why it's wrong here
While 'fw ctl zdebug drop' can reveal kernel drops, the scenario indicates that packets are leaving the firewall, so drops on the outbound path are less likely. The issue appears to be with return traffic not arriving or being dropped. This command would not specifically address asymmetric routing or state synchronization, which are the suspected causes. It might show drops, but not the root cause of missing return packets.
- ✗
Use 'tcpdump' on the external interface to verify if return packets are arriving at the gateway.
Why it's wrong here
Using 'tcpdump' on the external interface would confirm whether return packets reach the gateway, but it does not help determine if the problem is asymmetric routing or state synchronization. If packets are not arriving, it could be a network issue outside the firewall. If they are arriving but not being processed, it could be a state problem. However, this step alone does not provide the advanced troubleshooting needed to differentiate between these causes.
- ✗
Enable 'fw monitor' with the '-o' flag to capture all packets on all interfaces.
Why it's wrong here
Using 'fw monitor -o' captures packets on all interfaces, which could show where packets are dropped, but it does not specifically diagnose asymmetric routing or state synchronization. It might reveal that return packets are not being seen, but it would not explain why. Moreover, capturing on all interfaces can be resource-intensive and generate large amounts of data, making analysis difficult. It is not the most targeted next step.
Visual reference
Quick reference
Asymmetric Encryption Algorithm Comparison
| Algorithm | Key Exchange | Signatures | Equivalent Security Key | Notes |
|---|---|---|---|---|
| RSA-3072 | Yes | Yes | 128-bit | Widely deployed; slow for bulk data |
| ECDSA P-256 | No | Yes | 128-bit | Fast signatures; standard TLS certs |
| ECDH / ECDHE | Yes | No | 128-bit | Perfect forward secrecy in TLS 1.3 |
| DH / DHE | Yes | No | 128-bit (3072-bit key) | Replaced by ECDHE in modern TLS |
| Ed25519 | No | Yes | ~128-bit | SSH keys, modern PKI |
About these practice questions
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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.