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Category Archives for "Networking"

Encryption: A Building Block of a Trustworthy Internet

At the Internet Society, we’re committed to building a bigger and stronger Internet. To make sure it remains open, globally connected, secure, and trustworthy, we connect the right people to discuss different aspects of key legislative proposals. It’s a healthy way to create debate, setting up the right conditions for different parties to find common […]

The post Encryption: A Building Block of a Trustworthy Internet appeared first on Internet Society.

Kubernetes security policy design: 10 critical best practices

In this blog post, I will be looking at 10 best practices for Kubernetes security policy design. Application modernization is a strategic initiative that changes the way enterprises are doing business. The journey requires a significant investment in people, processes, and technology in order to achieve the desired business outcomes of accelerating the pace of innovation, optimizing cost, and improving an enterprise’s overall security posture. It is crucial to establish the right foundation from the beginning, to avoid the high cost of re-architecture. Developing a standard and scalable security design for your Kubernetes environment helps establish the framework for implementing the necessary checks, enforcement, and visibility to enable your strategic business objectives.

High-level design

 

Building a scalable Kubernetes security policy design requires that you adopt a fully cloud-native mindset that takes into account how your streamlined CI/CD process should enable security policy provisioning. A sound design would enable your enforcement and policy provisioning requirements in Day-N, while accommodating Day-1 requirements. The following list summarizes the fundamental requirements that a cloud-native security policy design should include:

  1. Segmentation of the control, management, and data planes
  2. Segmentation of deployment environments
  3. Multi-tenancy controls
  4. Application microsegmentation
  5. Cluster hardening
  6. Ingress access control
  7. Egress access control
  8. Continue reading

Heavy Strategy 008: Five Core Issues for IT Architects in 2021

I’ve just published the latest episode of Heavy Strategy with Johna Til-Johnson. In this episode we discuss five issues that we think IT Architects should be considered for 2021. The discussion on why and why not should be helpful for your own thinking and prepare you for discussions in your own organisations. You can find […]

Heavy Strategy 008: Five Core Issues for IT Architects in 2021

What five issues would be top of mind for IT architects ? Security, Backup.Recovery, Cloud, Skills Development and Distributed/Hybrid Work. Listen in on why and how these issues are our choices. If you have feedback or want us to followup then head over to our Follow Up page and send us your anonymous (or not) feedback.

The post Heavy Strategy 008: Five Core Issues for IT Architects in 2021 appeared first on Packet Pushers.

Authorize Better: Istio Traffic Policies with OPA, Styra DAS

Adam Sandor Adam is a solution architect at Styra, helping companies to adopt OPA and Styra DAS. He has been working in the cloud native space for the past six years, focusing on Kubernetes adoption and software delivery. In his free time, Adam is a dedicated DCS World pilot and happy cyclist roaming the cycle paths of the Netherlands. Cloud native tooling for authorization is an emerging trend poised to revolutionize the way we approach this oft-neglected part of our applications. Styra DAS offer. When services are connected using the Istio service mesh, all those sidecar proxies running Envoy are great places to make authorization decisions. All HTTP requests flow through them with metadata included about the source and destination services. The capabilities of Envoy are exposed by Istio in the form of the

Automatic Remediation of Kubernetes Nodes

Automatic Remediation of Kubernetes Nodes
Automatic Remediation of Kubernetes Nodes

We use Kubernetes to run many of the diverse services that help us control Cloudflare’s edge. We have five geographically diverse clusters, with hundreds of nodes in our largest cluster. These clusters are self-managed on bare-metal machines which gives us a good amount of power and flexibility in the software and integrations with Kubernetes. However, it also means we don’t have a cloud provider to rely on for virtualizing or managing the nodes. This distinction becomes even more prominent when considering all the different reasons that nodes degrade. With self-managed bare-metal machines, the list of reasons that cause a node to become unhealthy include:

  • Hardware failures
  • Kernel-level software failures
  • Kubernetes cluster-level software failures
  • Degraded network communication
  • Software updates are required
  • Resource exhaustion1
Automatic Remediation of Kubernetes Nodes

Unhappy Nodes

We have plenty of examples of failures in the aforementioned categories, but one example has been particularly tedious to deal with. It starts with the following log line from the kernel:

unregister_netdevice: waiting for lo to become free. Usage count = 1

The issue is further observed with the number of network interfaces on the node owned by the Container Network Interface (CNI) plugin getting out of proportion with the number of running pods:

$  Continue reading

Hedge 91: Leslie Daigle and IP Addresses Acting Badly

What if you could connect a lot of devices to the Internet—without any kind of firewall or other protection—and observe attackers trying to find their way “in?” What might you learn from such an exercise? One thing you might learn is a lot of attacks seem to originate from within a relatively small group of IP addresses—IP addresses acing badly. Listen in as Leslie Daigle of Thinking Cat and the Techsequences podcast, Tom Ammon, and Russ White discuss just such an experiment and its results.

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Day Two Cloud 106: Towards A More Open Cloud

On today's Day Two Cloud we discuss the notion of open cloud. The premise is about reducing or minimizing costs of migrating from a public cloud. In theory, open cloud lets organizations keep their options open to make changes and reduces lock-in. But is open cloud even feasible? Our guest is Chris Psaltis, co-founder and CEO of Mist.io, a startup building an open-source, multi-cloud management platform.

The post Day Two Cloud 106: Towards A More Open Cloud appeared first on Packet Pushers.

Day Two Cloud 106: Towards A More Open Cloud

On today's Day Two Cloud we discuss the notion of open cloud. The premise is about reducing or minimizing costs of migrating from a public cloud. In theory, open cloud lets organizations keep their options open to make changes and reduces lock-in. But is open cloud even feasible? Our guest is Chris Psaltis, co-founder and CEO of Mist.io, a startup building an open-source, multi-cloud management platform.

Free Speech is More than Words

A couple of weeks ago, I joined Leslie Daigle and Alexa Reid on Techsequences to talk about free speech and the physical platform—does the right to free speech include the right to build and operate physical facilities like printing presses and web hosting? I argue it does. Listen in if you want to hear my argument, and how this relates to situations such as the “takedown” of Parler.

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