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Knock on Ports

A powerful client to manage and run port knocking sequences
New in version 2.1.5
• Fixed a navigation issue
A utility for executing port knocking sequences to discreetly open access to services protected by firewalls. Configure custom sequences using UDP, TCP, or ICMP packets with support for both IPv4 and IPv6.

Key Features:

• Protocol Flexibility: Create sequences with UDP, TCP, or ICMP packets. Fine-tune parameters including destination ports, inter-packet delays, TTL, Hop Limit, and packet payload data.
• Automation & Integration: Automatically launch applications (e.g., SSH clients) or open URLs upon a successful knock. Supports integration with other tools via a custom URI scheme for advanced automation.
• Dual-Stack Support: Full compatibility with IPv4 and IPv6 networks.
• Wear OS Support: Execute your knock sequences directly from your smartwatch.
• Quick Access: Utilize home screen shortcuts and a widget for immediate execution of configured sequences.
• Customization: Adjust the interface with dynamic color themes (Android 12+), custom accents, and light/dark modes. Includes options for improved contrast.
• Configuration Management: Export and import your knocking sequences for backup or transfer.
• No Ads, Open Source: A free, transparent application focused on privacy and user control.
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Versions

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.

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  • Version 2.1.5 (360011200) suggested Added on Apr 21, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 7.0 or newer.

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

    Permissions

    Download APK 8.2 MiB PGP Signature | Build Log

    • New in version 2.1.4
    • New language localization: French (credit to @renaud38 and @Acide-Burn)
  • Version 2.1.4 (360011000) - Added on Apr 12, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 7.0 or newer.

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

    Permissions

    Download APK 8.2 MiB PGP Signature | Build Log

    • New in version 2.1.3
    • New language localization: German (credit to @MoisAlexander)
  • Version 2.1.3 (360010900) - Added on Mar 28, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 7.0 or newer.

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

    Permissions

    Download APK 8.1 MiB PGP Signature | Build Log

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