During the planning stage of an external penetration test, you compile a list of the target company's sub-domains, employee email addresses, and technology stack using search engines, certificate transparency logs, and public WHOIS data. You make no direct connections to any host owned by the organization. According to standard hacking concepts, which phase are you performing and why is it important at this point?
Active scanning; it quickly identifies open ports and services before any other engagement step.
Enumeration; it establishes sessions with hosts to pull detailed user and share information early on.
Passive reconnaissance; it minimizes the chance of detection by avoiding direct interaction with the target's infrastructure.
Covering tracks; it removes evidence of probing so security teams cannot trace the activity.
Collecting data exclusively from publicly available sources-without interacting with the target's systems-is known as passive reconnaissance (often called footprinting). Because no traffic is sent to the victim network, the activity is unlikely to trigger intrusion-detection alarms or violate scope limitations, making it a safe first step for understanding the environment. Active scanning, enumeration, or exploitation would require direct contact with the target and are normally conducted only after passive information gathering is complete, while covering tracks happens after attacks have been executed.
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