Quick Answer
The answer is firewall logs, as they are the definitive source for identifying all outbound connections from internal hosts to external IP addresses on specific ports. Firewall logs capture every allowed and denied traffic attempt, recording critical metadata such as source and destination IP addresses, port numbers, protocols, and timestamps, which makes them ideal for reconstructing outbound communication patterns in network forensics. On the Computer Hacking Forensic Investigator CHFI exam, this concept tests your ability to distinguish between log types—a common trap is choosing proxy logs or DNS logs, which only show application-layer requests or resolved hostnames, not the raw packet-level connection data that firewall logs provide. Remember that while IDS logs alert on suspicious activity, they do not log every connection, and netflow logs summarize traffic without per-packet port details. A simple memory tip: think of the firewall as the gatekeeper that writes down every car that leaves the garage, including its license plate (IP) and which exit gate (port) it used.
This CHFI practice question tests your understanding of os and network forensics. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
In network forensics, which type of log is BEST for identifying all outbound connections from internal hosts to external IP addresses on specific ports?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Firewall logs
Firewall logs capture all traffic passing through the firewall, including outbound connections.
IDS logs
Why wrong: IDS logs focus on alerts for suspicious patterns, not all connections.
Proxy logs
Why wrong: Proxy logs only cover HTTP/HTTPS traffic, not all ports.
NetFlow logs
Why wrong: NetFlow provides flow summaries, not detailed packet-level logs.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Firewall logs
Firewall logs record allowed and denied traffic, including source/destination IP and port, ideal for tracking outbound connections.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
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FAQ
OS and Network Forensics — This question tests OS and Network Forensics — Static NAT maps one inside address to one outside address..
The correct answer is: Firewall logs — Firewall logs record allowed and denied traffic, including source/destination IP and port, ideal for tracking outbound connections.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
This CHFI practice question is part of Courseiva's free EC-Council 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 CHFI exam.
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