Linux Routing Fundamentals (blog.sdn.clinic)
from learnbyexample@programming.dev to linux@lemmy.ml on 08 Feb 2025 15:17
https://programming.dev/post/25157344

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anamethatisnt@lemmy.world on 08 Feb 2025 15:53 next collapse

Linux Routing Fundamentals

Linux has been a first class networking citizen for quite a long time now. Every system running a Linux kernel out of the box has at least three routing tables and is supporting multiple mechanisms for advanced routing features from policy based routing (PBR), to VRFs(-lite), and network namespaces (NetNS). Each of these provide different levels or separation and features, with PBR being the oldest one and VRFs the most recent addition (starting with kernel 4.3).

This article is the first part of the Linux Routing series and will provide an overview of the basics and plumbings of Linux routing tables, what happens when an IP packet is sent from or through a Linux box, and how to figure out why. It’s the baseline for future articles on PBR, VRFs, and NetNSes, their differences as well and applications.

eldavi@lemmy.ml on 08 Feb 2025 17:18 collapse

did you forget to add your comment?

just_another_person@lemmy.world on 08 Feb 2025 16:04 next collapse

Meh

Shimitar@downonthestreet.eu on 08 Feb 2025 16:55 next collapse

Thanks! Interesting read

double_quack@lemm.ee on 08 Feb 2025 20:53 next collapse

Thank you! I learnt something today :)

hindy@mbin.lovetux.net on 09 Feb 2025 14:50 collapse

Thanks for sharing!