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Port Knocker

Port knocker client; supports one time sequences
Port Knocker is a port knocking utility application for Android.


* Ability to save/use profiles
* Supports one time sequences, automatically rotates port sequence when sequence list is provided
* Stores knock history
* Ability to check open port after knocking, to check for a successful knock

Behavior notes:

* When using one time sequences and open port checking, sequence rotation will only occur if the port knock was considered successful.
* If using the one time sequence feature, the next port sequence will be shown between in the parentheses in the profile list.
* The connect timeout for each port knock is 1000 ms.
* History will store the last 100 knocks.


Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.0 (1) suggested Added on 2020-12-29

    This version requires Android 4.4 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.

    Download APK 3.4 MiB PGP Signature | Build Log