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Linux networking refers to a set of tools, configurations, and protocols which allow Linux systems to communicate with each other and with other devices over a network. It provides a flexible and reliable mechanism, supporting a variety of topologies and use-cases.

Thumbnail of an article about FD.io’s VPP’s mechanical sympathy – thread and memory management techniques explained
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FD.io’s VPP’s mechanical sympathy – thread and memory management techniques explained

We've previously explained how VPP processes packets in vectors as opposed to processing each packet end to end. But how is this processing spread across CPU cores? How exactly is a vector of packets structured?
Michał Krasnoborski

Michał Krasnoborski

Thumbnail of an article about Packet dropping method: Iptables vs. alternatives in Linux
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Packet dropping method: Iptables vs. alternatives in Linux

Have you ever wondered about alternatives to iptables for dropping packets in Linux OS? Well, there are a few methods to do this. In this blog post we want to share them with you.
Adam Kułagowski

Adam Kułagowski

Thumbnail of an article about A Linux debugging and observation tools overview
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A Linux debugging and observation tools overview

Effective debugging and monitoring are crucial for performance optimization and troubleshooting in Linux systems. This guide dives into an array of essential tools that will improve your observation and debugging capabilities.
Adam Kułagowski

Adam Kułagowski

Thumbnail of an article about Linux network features from an ISP point of view
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Linux network features from an ISP point of view

Discover Linux network features from an ISP point of view. Learn about data plane features, control plane features, ISP services and more.
Multiple authors

Multiple authors

Thumbnail of an article about Linux network troubleshooting — commands and examples
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Linux network troubleshooting — commands and examples

Linux is a popular and powerful operating system that is widely used in both personal and professional settings. One of the key features of Linux is its robust networking capabilities, which make it an excellent choice for a wide range of networking tasks. The Linux network stack has grown significantly throughout the years and currently supports not only basic functionalities but also advanced and complex features (e.g. network namespaces allowing the creation of different and isolated network stack instances).
Michał Pawłowski

Michał Pawłowski

Thumbnail of an article about Berkeley Packet Filter (BPF) — general overview
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Berkeley Packet Filter (BPF) — general overview

At CodiLime, we believe that sharing knowledge with both our external and internal communities creates an organizational culture founded on innovation. That is why we organize regular online events during which our coworkers share their first-hand experiences and know-how on particular network and software development cases. Our latest event was held around the topic of the Berkeley Packet Filter, introduced by our senior software engineer, Łukasz Kszonowski. During his presentation, Łukasz covered the following topics:
Magdalena Szczęch

Magdalena Szczęch

Thumbnail of an article about Linux as a network device
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Linux as a network device

Using Linux as a network device can result in many benefits. Find out what network devices are and why it’s a good idea to use Linux as one. This is actually not an easy question to answer. In general, one can say that a network device is a piece of equipment whose main role is to forward packets or perform actions on them. While packet forwarding seems easy to understand, the actions that a packet can be a subject to differ between device types. For example, a router will (usually) route an IP packet based on a (OSI model) layer 3 header, a switch will use layer 2 for that, and a firewall can dig deeper into the packet payload.
Multiple authors

Multiple authors

Thumbnail of an article about What is a Linux container? LXC explained
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What is a Linux container? LXC explained

Linux containers is a virtualization method that allows for sharing resources like CPU and memory without creating virtual machines.
Karolina Rusinowicz

Karolina Rusinowicz

Thumbnail of an article about Why Vector Packet Processing is worth your time
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Why Vector Packet Processing is worth your time

The Vector Packet Processor (VPP) is a high-performance packet-processing stack that can run on commodity CPUs. In this article, I will take a closer look at what distinguishes this technology from others and how helpful it can be in meeting the demand for efficient network solutions. Regardless of the specific hardware or software implementation at the dataplane level, packet processing can be generally described as a sequence of operations that are performed on packets. This can be represented as a graph in which each vertex corresponds to an operation.
Paweł Parol

Paweł Parol

Thumbnail of an article about The modern, interoperable DC — Part 3: Seamless and secure connectivity for edge computing and hybrid clouds
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The modern, interoperable DC — Part 3: Seamless and secure connectivity for edge computing and hybrid clouds (video)

In the third part of our “Modern DC” webinar series we focus on connectivity with resources located beyond the local data center, somewhere in the Internet. This includes extending Layer 2 and Layer 3 tunnels to public clouds (such as AWS, Azure and GCP), branch offices, Edge Computing servers and IoT devices based on single-board computers.
Multiple authors

Multiple authors

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