Kathará is a lightweight network emulation system based on Docker containers.
It can be helpful in showing interactive demos/lessons, testing production networks in a sandbox environment, or developing new network protocols.
Each network device is emulated by a container. Virtual network devices are interconnected by virtual L2 LANs.
This is free and open source software.
Key Features
- Each container can potentially run a different Docker image.
- Built-in images include Quagga, FRRouting, Bind, P4, OpenVSwitch, and more, but you can also use your own container images.
- Simplifies the creation of complex networks using the concept of network scenario: a directory containing a file with the network topology, and, for each device, files and folders containing the configuration of that device.
- Emulates network scenarios using either Docker or Kubernetes as backend virtualization system.
- Cross-platform support – runs under Linux (x86_64 and ARM64), macOS (x86_64 and ARM64), and Windows (x86_64 and ARM64).
Website: github.com/KatharaFramework/Kathara
Support:
Developer: Kathará developers
License: GNU General Public License v3.0

Kathará is written in Python. Learn Python with our recommended free books and free tutorials.
Related Software
| Network Simulators | |
|---|---|
| GNS3 | Emulate, configure, test, and troubleshoot virtual and real networks |
| Kathará | Lightweight network emulation system based on Docker containers |
| Shadow | Discrete-event network simulator |
| Dynamips | Emulate Cisco routers |
| ns-3 | Discrete-event network simulator |
| Cooja | Network simulator written in Java |
| CORE | Network emulation platform |
| Cloonix | Create and manage complex virtual network topologies |
Read our verdict in the software roundup.
LinuxLinks helps you discover the best free and open source software for Linux. Explore our extensive collection of recommended applications, including alternatives to popular proprietary software.We also publish software reviews, Linux tutorials, hardware reviews, free programming books and articles covering the wider open source community. Browse our Linux resources to discover more. Know a useful free and open source Linux application we haven't covered? Suggest a program for inclusion. Has your software been featured on LinuxLinks? Display one of our Featured on LinuxLinks badges on your website or GitHub README. |


Please read our Comment Policy before commenting.
Hi Steve. I think the GH link is wrong.
Hi Torin, thanks for spotting a wrong link here. Link corrected.
You’re welcome.
BTW, Kathará is also cross-platform.
Thanks again, features section updated accordingly.