Port Knocker1.0

Send a defined sequence of connection attempts from an Android device to interact with a configured network service using port knocking. Port Knocker gives mobile users a dedicated client for networks that control service access through a particular order of connection attempts.

You can create and save profiles for different port-knocking configurations, then use the appropriate profile when contacting a service. Profiles support one-time sequences, with the supplied sequence list rotated automatically after a sequence is used. When one-time sequences and open-port checking are both enabled, the list advances only after the knock is judged successful. For an active profile, the next available sequence appears in parentheses in the profile list.

The application keeps a history of the last 100 knocks, making previous activity available for reference. It can test an open port after sending a sequence, helping indicate whether the service accepted the knock. Every port-knocking attempt uses a connection timeout of 1000 milliseconds, giving the operation a defined wait period.

Port Knocker suits administrators and other users who need to trigger protected network services from a phone or tablet. It runs on Android 4.4 or later, uses a Universal architecture, and is distributed under an open-source license. As an Internet & Browsers utility, its main distinction is combining reusable profiles, rotating one-time sequences, success-aware port checks, and mobile access in one client.