VyOS is not a typical desktop Linux distribution — it is a fully-fledged network operating system designed to replace proprietary routers and firewalls such as Cisco IOS, Juniper JunOS, and MikroTik RouterOS. Born as a fork of Vyatta Core in 2013, VyOS has grown into one of the most capable and widely respected open-source network platforms available today.
A Powerful CLI-Driven Network Platform
At its core, VyOS uses a Vyatta-inspired hierarchical CLI that will feel familiar to anyone experienced with enterprise networking gear. Configuration changes are staged before being committed, and the entire running configuration can be saved, compared, and rolled back — a workflow that mirrors the operational model of enterprise routers. This design philosophy makes VyOS ideal for network engineers who need precision and repeatability.
Routing and Protocol Support
VyOS supports an impressive range of dynamic routing protocols via the FRRouting (FRR) suite, including BGP, OSPF (v2 and v3), RIP, IS-IS, and more. It handles static routing, policy-based routing (PBR), ECMP, and route redistribution. Whether you are running a home lab simulating ISP peering or managing a real multi-site enterprise network, VyOS has the routing feature set to match.
VPN and Tunneling
One of VyOS's strongest suits is its comprehensive VPN support. It natively supports IPsec (IKEv1 and IKEv2), OpenVPN, WireGuard, L2TP/IPsec, SSTP, and GRE/IPIP tunnels. This makes it an excellent choice for building site-to-site VPNs, road-warrior remote access solutions, and SD-WAN-style overlays — all without paying for expensive proprietary licenses.
Firewall and Traffic Control
The firewall subsystem is built on Linux nftables (with legacy iptables support), allowing stateful packet inspection, zone-based firewalling, and fine-grained access control lists. VyOS also supports traffic shaping and QoS via the Traffic Control (tc) subsystem, making it possible to prioritize voice traffic, throttle bulk downloads, and enforce bandwidth policies per interface or per flow.
Virtualization and Cloud-Ready
VyOS is designed to run beautifully as a virtual machine. Official images exist for VMware, KVM/QEMU, VirtualBox, Hyper-V, and major cloud platforms including AWS, Azure, and Google Cloud. For home labs built on Proxmox or EVE-NG, VyOS is a go-to router VM. Cloud images can be deployed with cloud-init, making automated provisioning straightforward.
Build System and Releases
The community edition of VyOS is built from source using the open-source build toolchain and distributed as nightly rolling builds (the "current" branch). VyOS LTS releases (e.g., 1.3 Equuleus, 1.4 Sagitta) are available for subscribers via the commercial offering by Sentrium S.L. This dual-track model can be a point of friction for those who need a stable, production-ready release without a subscription.
Community and Ecosystem
VyOS has a vibrant community centred around its forum, Discord, and GitHub repository. Documentation is thorough and well-maintained at docs.vyos.io. Contributions from the community drive development forward, and the project maintains transparency about its roadmap and release process.
In summary, VyOS is the definitive choice for network engineers, homelabbers, and enterprises seeking an open-source alternative to proprietary networking hardware. Its depth of features, combined with its Debian foundation and zero licensing cost, makes it extraordinarily compelling despite its steep learning curve.