Network security professionals should minimize open ports to reduce their attack surface, as tools like Shodan can quickly discover forgotten open ports that become critical vulnerabilities when zero-day exploits emerge.
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#Shodan shows you every exposed port on the internet. Takes less than five seconds.Added:
Tools like Shodan make it trivial to find every open port on the internet and a zero day and when a zero day drops, suddenly that forgotten open port is a liability. We want to keep only ports that are necessary open so we can control our attack surface.
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