LSE toolsLSE toolsOpenSnitch (235)OpenSnitch (235)

Tool and Usage

OpenSnitch is a Linux port of the popular macOS Little Snitch application firewall

Screenshot for OpenSnitch tool review


OpenSnitch is a tool based on Little Snitch, a macOS application level firewall. All outgoing connections are monitored and the user is alerted when a new outgoing connection occurs. This allows the user to detect and block any unwanted connections.

The OpenSnitch tool relies on NFQUEUE, which is an extension for iptables. With this extension software running in userland can intercept IP packets and allow/drop them.

Usage and audience

OpenSnitch is commonly used for network traffic filtering. Target users for this tool are general public and system administrators.


  • OpenSnitch is written in Python
  • Graphical user interface

Tool review and remarks

The review and analysis of this project resulted in the following remarks for this security tool:


  • + More than 2000 GitHub stars
  • + The source code of this software is available

Author and Maintainers

OpenSnitch is under development by Simone Margaritelli.


Supported operating systems

OpenSnitch is known to work on Linux.


Several dependencies are required to use OpenSnitch.

  • iptables

OpenSnitch alternatives

Similar tools to OpenSnitch:



Douane is an application firewall that interacts with the user to allow or deny new network connections.



ArpON is a host-based tool to improve the security of the Address Resolution Protocol (ARP).

See all alternatives tools for OpenSnitch »

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Project details
Latest releaseNo release found

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GitHub iconOpenSnitch GitHub project page

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