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Training Camp • Cybersecurity Glossary
Port Knocking is a security technique used to secure network access by requiring a series of connection attempts to predefined ports in a specific sequence before allowing access to a service.
Port Knocking Definition: Port Knocking is a security technique used to secure network access by requiring a series of connection attempts to predefined ports in a specific sequence before allowing access to a service.
Port knocking is a security measure used to protect network services by making them accessible only to users who know the specified sequence of "knocks" or connection attempts on a set of pre-defined ports. Once the correct sequence is detected, the firewall dynamically opens the port to allow the requested service to establish a connection. This technique adds an additional layer of security by hiding open ports from potential attackers and reducing the likelihood of unauthorized access.
Port Knocking is one of the topics you'll master in the Cisco CCNA Boot Camp.
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