156-583 Sample Questions & Answers
Ten equally weighted topics run through packet capture via the CLI and Wireshark, user-space and kernel-space process issues, SmartConsole connectivity, log-collection failures, identity-awareness diagnostics, application-control faults, and traffic monitoring.
Launch the full 156-583 simulator →Showing 6 of 12 free samples.
- Question 1Intermediate
Introduction to Troubleshooting · Troubleshooting methodology principles
When applying the OSI model for cause isolation during troubleshooting, which of the following Check Point tools is MOST appropriate for diagnosing an issue at Layer 3 (Network Layer)?
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Correct answer: C
At Layer 3 (Network Layer), troubleshooting involves IP addressing and routing. The 'ip route show' (or 'netstat -rn') command is the appropriate tool for verifying routing tables. 'fw ctl arp' operates at Layer 2, while 'cpstat appi' operates at Layer 7.
- Question 2Beginner
Traffic Monitoring Fundamentals · Using logs and monitoring in troubleshooting
True or False: When investigating traffic flow issues, the SmartConsole Logs & Monitor view will always display drops caused by the implied rule 'Drop out of state TCP packets'.
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Correct answer: B
False. In SmartConsole > Global Properties > Stateful Inspection, 'Drop out of state TCP packets' and its 'Log on drop' option are enabled by default, so these drops normally do appear in Logs & Monitor. However, logging is configurable (Log on drop can be cleared, and exceptions can be defined), so the view will not always show them. 'fw ctl zdebug drop' on the gateway shows kernel drops in real time whether or not they are logged.
- Question 3Intermediate
Traffic Monitoring Fundamentals · Using logs and monitoring in troubleshooting
During a troubleshooting session, an administrator observes that traffic from a web server is failing. The SmartConsole log shows the traffic matching an accept rule, but the connection still fails. Which of the following is the MOST likely cause that should be investigated next?
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Correct answer: C
If an initial connection is accepted by the security policy but the connection still fails, a common cause is a routing issue or a misconfigured NAT rule. The gateway may accept the outbound packet, but if NAT is incorrectly applied, the return packet may not reach the original source or may be dropped due to state mismatch.
- Question 4Advanced
Traffic Monitoring Fundamentals · Using logs and monitoring in troubleshooting
A network engineer reports that SSH connections to an internal server are randomly dropping. Upon running 'fw ctl zdebug drop', you see the error: 'Reason: TCP packet out of state: First packet isn't SYN'. What is the MOST likely cause of this issue?
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Correct answer: B
Check Point gateways are stateful firewalls. If they receive a non-SYN TCP packet (like an ACK or PSH) without having seen the initial SYN packet to build the state table entry, they will drop it as 'out of state'. This is classically caused by asymmetric routing where the gateway only sees half of the conversation.
- Question 5Intermediate
Traffic Monitoring Fundamentals · Using logs and monitoring in troubleshooting
When reviewing logs in SmartConsole to troubleshoot a dropped connection, you notice the drop reason is 'Address spoofing'. Which component of the Check Point architecture is responsible for this drop?
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Correct answer: B
Address spoofing drops occur when a packet arrives on an interface from a source IP address that, according to the gateway's Interface Topology configuration, should not exist on that interface. It is a fundamental routing and security check performed before rulebase inspection.
- Question 6Beginner
Packet Capture Fundamentals · Capture tools: fw monitor, tcpdump, cppcap
An administrator needs to capture traffic to troubleshoot an issue, but must see the packets exactly as they enter and leave the Check Point firewall's virtual machine inspection points (pre-inbound, post-inbound, pre-outbound, post-outbound). Which tool is specifically designed to provide this level of visibility?
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Correct answer: C
The 'fw monitor' utility is unique to Check Point and captures packets as they traverse the firewall kernel at four distinct inspection points: pre-inbound (i), post-inbound (I), pre-outbound (o), and post-outbound (O). 'tcpdump' only captures at the interface level (NIC).
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