CCSM Advanced Firewall Troubleshooting Practice Question
Exhibit
Output of fw ctl zdebug drop: [cpu_0];[fw4_0];fw_log_drop_conn: Packet dropped because of violation of stateful inspection (out of state);
Refer to the exhibit. An administrator is troubleshooting an intermittent connection drop. Based on the debug output, what is the most likely culprit?
⚠ Common exam trap
Candidates often assume the connection drop is caused by a restrictive security policy rule and spend time modifying rules, completely missing the underlying network routing issue.
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
✓
Asymmetric routing is preventing the gateway from seeing the initial handshake.
The 'out of state' error indicates that the firewall received a packet that does not follow the TCP three-way handshake sequence or violates the established state of an existing connection. This often happens due to asymmetric routing, where the return traffic takes a different path, preventing the gateway from seeing the SYN or ACK packets. Identifying this early saves hours of debugging policy rules when the issue is network topology.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The Security Policy has an overlapping rule that is causing a conflict.
Why it's wrong here
Rule conflicts usually result in 'Reject' or 'Drop' messages specifically linked to a rule ID in the logs. The 'out of state' error is a kernel-level protection mechanism, not a result of policy rule ordering, as it pertains to protocol integrity rather than security policy definitions.
- ✓
Asymmetric routing is preventing the gateway from seeing the initial handshake.
Why this is correct
When the firewall receives a packet that does not correspond to a known session, or the handshake sequence is incomplete, it drops the packet as 'out of state'. This is common in environments where traffic flows are not symmetrical, meaning the gateway only sees half of the conversation.
- ✗
The Anti-Spoofing configuration on the interface is too aggressive.
Why it's wrong here
Anti-spoofing drops are logged specifically as 'Anti-Spoofing' violations. If the gateway were dropping packets due to anti-spoofing, the debug output would reflect a check against the interface topology and IP spoofing parameters, rather than a stateful inspection protocol violation message like 'out of state'.
- ✗
The connection limit for the specific source IP has been reached.
Why it's wrong here
Connection limits are managed by the connection table and would trigger a 'Connection limit reached' message or similar system logging. This state, specifically 'out of state', is strictly related to TCP/UDP packet sequencing and state tracking within the firewall kernel, not resource exhaustion or connection counts.
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
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.