# Open\-Source Routing and Network Simulation: Descriptions and evaluations of open\-source projects related to network emulation and simulation

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## Pages
- [Open\-Source Network Simulators](https://brianlinkletter.com/open-source-network-simulators/)
- [Network Simulator News](https://brianlinkletter.com/open-source-network-simulators/network-simulator-news/)
- [Citations](https://opensourcenetworksimulators.com/about_brian_linkletter/citations/)
- [About](https://opensourcenetworksimulators.com/about_brian_linkletter/)
- [Archive](https://brianlinkletter.com/open-source-network-simulation-archive/)

## Posts
- [Recreating a Real\-World BGP Hijack with the Kathará Network Emulator](https://opensourcenetworksimulators.com/2026/02/bgp-hijack-with-kathara-network-emulator/): Use the Kathará network emulator to recreate one of the most famous BGP hijacking incidents in Internet history, the 2008 YouTube hijack\. By building a small network topology and simulating a similar attack, you will learn both the fundamentals of Kathará and to gain hands\-on experience with BGP security concepts\.
- [Building IRRd and bgpq4 Docker Containers for Network Labs](https://opensourcenetworksimulators.com/2026/03/building-irrd-and-bgpq4-docker-containers-for-network-labs/): In this post, I walk through the process of building reusable IRRd and bgpq4 container images that can be dropped into any network emulator that supports Docker containers, such as Containerlab, GNS3, or Kathará\.
- [Containerlab Network Emulator v0\.73 Review](https://opensourcenetworksimulators.com/2026/03/containerlab-network-emulator-v0-73-review/): Five years after I first reviewed it, Containerlab has matured into a polished, developer\-friendly platform with a rich ecosystem of tools built around it\. In this post, I will revisit Containerlab and cover what has changed since my original review\.
- [Open\-source network simulators and emulators in 2026](https://opensourcenetworksimulators.com/2026/02/open-source-simulator-emulator-in-2026/): In this annual update of my list of open\-source network simulators and emulators, I check each projects's activity level, verify the well\-maintained projects, identify new projects that deserve attention, and consider projects that may be fading away\.
- [Cloonix Network Emulator Updated to Version 53](https://opensourcenetworksimulators.com/2026/01/cloonix-network-emulator-updated-to-version-53/): The Cloonix network emulator continues to be actively developed\. In version 53, it provides container support, a rootless installation option, experimental support for WiFi emulation, and a simplified user experience\.

## Categories
- [Open Source Networking](https://brianlinkletter.com/category/open-source-routing/)
- [Network Simulation](https://brianlinkletter.com/category/network-simulation/)
- [Network Automation](https://brianlinkletter.com/category/network-automation/)
- [Learning IP](https://brianlinkletter.com/category/learning-ip-networking/)
- [Publishing](https://brianlinkletter.com/category/publishing/)

## Tags
- [cloonix](https://brianlinkletter.com/tag/cloonix/)
- [virtualization](https://brianlinkletter.com/tag/virtualization/)
- [simulation](https://brianlinkletter.com/tag/simulation/)
- [CORE](https://brianlinkletter.com/tag/core/)
- [GNS3](https://brianlinkletter.com/tag/gns3/)

## Optional
- [Sitemap index](https://brianlinkletter.com/sitemap_index.xml)