How to Use Linux Network Namespaces for Multi-Tenant Isolation

In this episode, Lucas and Luna dive deep into Linux network namespaces as a practical tool for multi-tenant server isolation. They walk through a real-world scenario: setting up two isolated network stacks on a single host using 'ip netns', configuring virtual Ethernet pairs, and assigning IP addresses so each namespace can talk to the outside world independently. Lucas explains the difference between network namespaces and VLANs, and why namespaces are lighter weight for container-like workloads. Luna asks about troubleshooting common pitfalls like missing routes or firewall rules that leak between namespaces. The hosts also touch on how cloud providers use network namespaces under the hood for virtual networks. If you manage servers where multiple clients or services need separate network environments without full virtualization, this episode gives you the concrete steps to implement it today.

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