Port Knocker

Port Knocker is an open-source port knocking utility for Android. It is intended for users who need to send port knock sequences from an Android device. Port knocking uses a defined sequence of connection attempts to interact with a configured network service.

The application lets users save and use profiles for different port knocking setups. Profiles can use one-time sequences, and a supplied sequence list is rotated automatically after use. When one-time sequences and open-port checking are enabled, rotation occurs only when the knock is considered successful. The next sequence is shown in parentheses in the profile list when the one-time sequence feature is active.

Port Knocker stores a history of the last 100 knocks. It can check an open port after sending a sequence to help determine whether the knock succeeded. Each port knock uses a connection timeout of 1000 milliseconds.

As an Android application in the Internet category, Port Knocker is suited to users who need this network utility on a mobile platform. Its open-source license allows the software to be distributed under that licensing model. MirrorNest mirrors the official Android build directly on its own storage and scans it for malware before publishing.