I'm rounding out the end of my year with a bit of travel with KubeCon in Atlanta next week and Linux Plumbers Conference in Tokyo mid-December. If you are at either event, please come and say hi. I might have something special if you mention the newsletter ;) I love in person events because you can catch up with so many people (and so much gossip) at once. If you can't make it to Japan, but still want to join the LPC discussion virtually I have a few passes from the eBPF Foundation to give away. Just tell me your favorite initiative from the Foundation this year. I've got 4 talks to finish up before Sunday so let’s 🐝 -gin.
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eCHO news is your bi-weekly wrap up of all things eBPF and Cilium. If you want to keep up on the latest in cloud native networking, observability, and security this is your quelle

4th November 2025

 

I'm rounding out the end of my year with a bit of travel to KubeCon in Atlanta next week and Linux Plumbers Conference in Tokyo mid-December. If you are at either event, please come and say hi. I might have something special if you mention the newsletter ;) I love in person events because you can catch up with so many people (and so much gossip) at once. If you can't make it to Japan, but still want to join the LPC discussion virtually I have a few passes from the eBPF Foundation to give away. Just tell me your favorite initiative from the Foundation this year. I've got 4 talks to finish up before Sunday so let’s 🐝 -gin.

The Technical

IPv6 Only Kubernetes with Cilium: What to Know Before Production

Number six will really surprise you

 

A deep dive into BPF LPM trie performance and optimization

"We can now work towards building a more performant and efficient solution for the future of the Internet"

 

Continuous NVIDIA CUDA Profiling In Production

with USDT Probes and eBPF

 

BCC eBPF kernel function mounting practice and characteristics

Find out different hook types and their use cases

 

Connecting distributed Kubernetes with Cilium and SD-WAN: Building an intelligent network fabric

such as Cisco Catalyst SD-WAN ;)

 

Stopping kill signals against your eBPF programs

How to make eBPF programs immortal

 

Attacking and Securing eBPF Maps

Conclusion: don't let people be sudo on your machine

 

Taming Multi-Cloud Kubernetes Networking with Topology Aware Routing

"The Solution: Cilium to the Rescue"

 

Cilium’s new Hubble flow policy log field

Determine which network policy was applied to a network flow

 

Using eBPF to attribute packet drops to netfilter rules

"An incredibly powerful technique to obtain any information from a running kernel"

 

qweralfredo/ebpf-design

ReactFlow-based canvas for building eBPF programs visually. Learn or die

 

haolipeng/ebpf-tutorial

Beginner-friendly eBPF hands-on tutorial

 

libbpf/blazesym

Library for address symbolization and related tasks

 

arxignis/moat

eBPF-powered TCP/HTTP proxy agent with built-in ADR

 

Internet-Architecture-and-Security/PacketScope

A general-purpose protocol stack analysis and debugging tool based on eBPF

 

networkedsystemsIITB/flash

Userspace library to build efficient, unprivileged AF_XDP network applications

 

amiremohamadi/btls

bpftrace language server

🐝

 

The Ecosystem

Delivering High Performance Workflows with Cybozu and Cilium

"Cilium’s largest value was higher service availability and increased security through network policy"

 

Transforming Scientific Computing Infrastructure for IPv6 with Cilium at ESnet

"The power of Hubble is a godsend. If there’s one tool I use day in and day out, that’s Hubble"

 

The Network Segmentation Spectrum

From traditional external boxes down to runtime with eBPF in the kernel

 

InfoQ Cloud and DevOps Trends Report - 2025

eBPF has crossed the chasm and hit early majority adoption

 

The Challenges of Uniting VMs and Containers on a Single Platform

"Cilium brings a networking model that feels familiar to VM and NSX operators"

🐝

 

The How To

Safely Managing Cilium Network Policies in Kubernetes: Testing and Simulation Techniques

Learn to test and validate before enforcement to limit accidental outages 

 

Simplest IPv6 only k3s cluster using Cilium

Using "wizardry and arcane magic in the realm of Kubernetes & IPv6 networking"

 

Building a Raspberry Pi5 Cluster with Talos Linux and Cilium

including flashing the OS to an SD Card

 

eBPF CO-RE Skill Path: Coding Labs Now Available

How to design truly portable eBPF programs

 

eBPF by Example: Building a GPU Flamegraph Profiler with CUPTI

Find out which CPU code is responsible for launching a specific GPU kernel

 

externalTrafficPolicy: Local > Cluster

"Cilium opens up a lot of possibilities when it comes to traffic engineering"

🐝

 

The Video

Interview with Avi Lumelsky, AI Security Researcher at Oligo Security

Find out where Avi disagrees with Brendan Gregg

 

Building Observable Systems with eBPF and Linux (with Mohammed Aboullaite)

Buying in to continuous profiling

🐝

 

The Events

CiliumCon NA

November 10th in Atlanta, see you next week!

 

eBPF Summit 2025: Hackathon Edition

Submissions open Oct 13–Nov 30

 

Linux Plumbers Conference

eBPF track schedule out now. Ping me if you want to share some sushi there

 

CiliumCon EU

Can't wait for some stroopwafels

🐝 

The Livestreams

eCHO Episode 196: Exploring Tetragon on Linux Servers

eCHO Episode 196: Exploring Tetragon on Linux Servers

  

eCHO Episode 197: Getting your hands dirty with eBPF and Kprobes

eCHO Episode 197: Getting your hands dirty with eBPF and Kprobes

The Post of the Week

🐝 What a huge milestone - Cilium is built from the work, dreams, love and care of over 1000 contributors! ❤️

As always, if you’ve seen a blog post, a tool, or anything else eBPF or Cilium related that you think the rest of the community should hear about, send them my way. You can either hit reply or join the #echo-news channel on Cilium Slack. You can also find all of the past episodes on the website.

🐝

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Written and sent by Bill Mulligan. Any feedback is welcome!

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I work for Isovalent at Cisco which is leading the eBPF-Powered Revolution in Cloud Native Networking, Observability, and Security with Cilium and Tetragon

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