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How to use the sar command: 2-Minute Linux Tips

In this Linux tip, learn how to use the sar command. The name "sar" stands for "system activity report". It provides details on all aspects of system performance including system load, CPU usage, memory use, paging, swapping, disk usage, device load, network activity and so on.

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Video: Theoretical View of Network Addressing

After explaining the basics of (network) names, addresses and routes, I wasted a few minutes of everyone’s time discussing the theoretical aspects of layered addressing, and then got back to practical issues like address scopes, namespaces, and address provisioning.

The video ends with a simple (and unappreciated) truth: if you have a point-to-point link between two nodes you don’t need data-link-layer addresses. The consequences of that fact are left as an exercise for the viewer (or you can wait till the next video ;)

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Video: Theoretical View of Network Addressing

After explaining the basics of (network) names, addresses and routes, I wasted a few minutes of everyone’s time discussing the theoretical aspects of layered addressing, and then got back to practical issues like address scopes, namespaces, and address provisioning.

The video ends with a simple (and unappreciated) truth: if you have a point-to-point link between two nodes you don’t need data-link-layer addresses. The consequences of that fact are left as an exercise for the viewer (or you can wait till the next video ;)

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Cisco: Networking, security, collaboration at heart of hybrid workforce concerns

When it comes to supporting the emerging hybrid workforce, getting the network and security right is top of mind among enterprise IT leaders.That's one finding detailed in Cisco’s new Hybrid Work Index, which the company says will be updated quarterly to gauge how worker and technology habits are evolving as the COVID-19 pandemic continues.The 10 most powerful companies in enterprise networking 2021 Cisco says the index gleans information from anonymized customer data points culled from a number of its products, including Meraki networking, ThousandEyes internet visibility, Webex collaboration, and security platforms Talos, Duo and Umbrella. The index also incorporates third-party survey data from more than 39,000 respondents across 34 countries.To read this article in full, please click here

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How to Know When to Abandon an Underperforming Cloud Provider

Switching cloud providers is never a decision to be taken lightly, yet change is often unavoidable.

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In a win for the Internet, federal court rejects copyright infringement claim against Cloudflare

Since the founding of the Internet, online copyright infringement has been a real concern for policy makers, copyright holders, and service providers, and there have been considerable efforts to find effective ways to combat it. Many of the most significant legal questions around what is called “intermediary liability” — the extent to which different links in the chain of an Internet transmission can be held liable for problematic online content — have been pressed on lawmakers and regulators, and played out in courts around issues of copyright.

Although section 230 of the Communications Decency Act in the United States provides important protections from liability for intermediaries, copyright and other intellectual property claims are one of the very few areas carved out of that immunity.

A Novel Theory of Liability

Over the years, copyright holders have sometimes sought to hold Cloudflare liable for infringing content on websites using our services. This never made much sense to us. We don’t host the content of the websites at issue, we don’t aggregate or promote the content or in any way help end users find it, and our services are not even necessary for the content’s availability online. Infrastructure service providers like Cloudflare are Continue reading

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DDoS protection quickstart guide

DDoS Protect is an open source denial of service mitigation tool that uses industry standard sFlow telemetry from routers to detect attacks and automatically deploy BGP remotely triggered blackhole (RTBH) and BGP Flowspec filters to block attacks within seconds.

This document pulls together links to a number of articles that describe how you can quickly try out DDoS Protect and get it running in your environment:

• Docker DDoS testbed describes how Docker Desktop can be used to try out DDoS Protect on your laptop using simulated DDoS attacks.
• FRR builds on the Docker testbed by including the open source FRRouting engine.
• Real-time DDoS mitigation using BGP RTBH and FlowSpec describes how configure DDoS Protect to work with Arista / EOS routers
• DDoS Mitigation with Juniper, sFlow, and BGP Flowspec describes how to configure DDoS Protect to work with Juniper / Junos routers.
• DDoS Mitigation with Cisco, sFlow, and BGP Flowspec describes how to configure DDoS Protect to work with Cisco / IOS XR routers.
• DDoS protection of local address space describes how to configure DDoS Protect to automatically classify address space.
• Pushing BGP Flowspec rules to multiple routers describes how to configure DDoS protect to send migitgation rules to mulitple Continue reading

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The Advantages and Challenges of Going ‘Edge Native’

As the internet fills every nook and cranny of our lives, it runs into greater complexity for developers, operations engineers, and the organizations that employ them. How do you reduce latency? How do you comply with the regulations of each region or country where you have a virtual presence? How do you keep data near where it’s actually used? For a growing number of organizations, the answer is to use the edge. In this episode of the New Stack Makers podcast, Sheraline Barthelmy, head of product,  marketing and customer success for Cox Edge, were joined by The Advantages and Challenges of Going ‘Edge Native’ Also available on Google Podcasts, PlayerFM, Spotify, TuneIn The edge is composed of servers that are physically located close to the customers who will use them — the “last Continue reading

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Waiting Room: Random Queueing and Custom Web/Mobile Apps

Today, we are announcing the general availability of Cloudflare Waiting Room to customers on our Enterprise plans, making it easier than ever to protect your website against traffic spikes. We are also excited to present several new features that have user experience in mind — an alternative queueing method and support for custom web/mobile applications.

First-In-First-Out (FIFO) Queueing

Whether you’ve waited to check out at a supermarket or stood in line at a bank, you’ve undoubtedly experienced FIFO queueing. FIFO stands for First-In-First-Out, which simply means that people are seen in the order they arrive — i.e., those who arrive first are processed before those who arrive later.

When Waiting Room was introduced earlier this year, it was first deployed to protect COVID-19 vaccine distributors from overwhelming demand — a service we offer free of charge under Project Fair Shot. At the time, FIFO queueing was the natural option due to its wide acceptance in day-to-day life and accurate estimated wait times. One problem with FIFO is that users who arrive later could see long estimated wait times and decide to abandon the website.

We take customer feedback seriously and improve products based on it. A frequent request Continue reading

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Between 0x2 Nerds Live Stream on Network Complexity

I’m sitting with Jeff Doyle and Jeff Tantsura to talk about network complexity on the Between 0x2 Nerds podcast today at 1PM ET today. The link is here—

Join us if you can.

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From the Desk of the CEO: Pluribus Raises $20M from Morgan Stanley to Fuel Growth

Today, Pluribus Networks announced a funding round of $20 million led by Morgan Stanley Expansion Capital.

The post From the Desk of the CEO: Pluribus Raises $20M from Morgan Stanley to Fuel Growth appeared first on Pluribus Networks.

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From the Desk of the CEO: Pluribus Raises $20M from Morgan Stanley Expansion Capital to Fuel Growth

To the Pluribus Networks community:

Today, Pluribus Networks announced a funding round of $20 million led by Morgan Stanley Expansion Capital. This is an extremely exciting time for our company and for the industry, and the capital raised during this round will enable Pluribus to increase R&D and add sales and marketing capacity to accelerate its growth in the distributed cloud market, as well as expand into adjacent segments. In the coming months, we’ll be announcing a number of new product and partner initiatives that reflect the market’s increasing need for cost-effective and highly-automated data center networking fabric solutions.

The timing around this funding news is truly ideal. Industry analysts are consistently forecasting an increase in market opportunities around data center switching as digital transformation continues to accelerate globally – Dell ’Oro Group expects the market to surpass $20 billion by 2025. Furthermore, research completed this year by Enterprise Management Associates shows that the majority of enterprises are increasing their number of data center sites and over 80% intend to deploy active-active data centers to support availability zones. In that same research enterprises identify their top two challenges as network operational complexity and network architecture complexity. Pluribus Networks’ Netvisor^® Continue reading

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Tier 1 Carriers Performance Report: September, 2021

The post Tier 1 Carriers Performance Report: September, 2021 appeared first on Noction.

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Ananki startup tries to simplify private 5G

A startup using open-source components to offer software-defined private 5G as a service hopes to attract enterprises with an architecture that it says is as simple as Wi-Fi's. 5G resources How 5G frequency affects range and speed Private 5G can solve some problems that Wi-Fi can’t Private 5G keeps Whirlpool driverless vehicles rolling 5G can make for cost-effective private backhaul CBRS can bring private 5G to enterprises Called Ananki, the company requires little of enterprises in order to deploy the service: Customers set up small-cell 5G radios on-site, point them toward a cloud network running the Ananki software, install SIMs on the enterprise hardware that will tap into the service, and Ananki’s automation remotely configures the radios and provisions the SIMs.To read this article in full, please click here

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Kioxia seeks to make the SSD more programmable

NAND flash maker Kioxia has expanded its Software-Enabled Flash technology to bring a greater degree of programmability to NAND storage. The move will benefit hyperscalers the most but will have benefits for enterprises and SMBs as well.Kioxia (formerly Toshiba) first introduced SEF last year. It’s an open-source API that operates as a new kind of hardware flash controller to offload some functions to a controller, thus freeing up the CPU, while allowing large data-center environments to manage at scale.Because the API is open source, competitors in the flash space can adopt the API and customize it for their hardware. Hyperscalers think about SSDs in terms of deploying and serving workloads at scale. Kioxia notes that cloud providers often have different types of drives they deploy for different use cases, like block storage versus file storage or ZNS.To read this article in full, please click here

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Kioxia seeks to make the SSD more programmable

NAND flash maker Kioxia has expanded its Software-Enabled Flash technology to bring a greater degree of programmability to NAND storage. The move will benefit hyperscalers the most but will have benefits for enterprises and SMBs as well.Kioxia (formerly Toshiba) first introduced SEF last year. It’s an open-source API that operates as a new kind of hardware flash controller to offload some functions to a controller, thus freeing up the CPU, while allowing large data-center environments to manage at scale.Because the API is open source, competitors in the flash space can adopt the API and customize it for their hardware. Hyperscalers think about SSDs in terms of deploying and serving workloads at scale. Kioxia notes that cloud providers often have different types of drives they deploy for different use cases, like block storage versus file storage or ZNS.To read this article in full, please click here

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Should You Build or Buy a Router?

Patrik Schindler sent me an interesting comment to my Open-Source DMVPN Alternatives blog post:

Welcome to the build-or-buy dilemma, router edition.

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Should You Build or Buy a Router?

Patrik Schindler sent me an interesting comment to my Open-Source DMVPN Alternatives blog post:

Welcome to the build-or-buy dilemma, router edition.

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Update on recent VoIP attacks: What should I do if I’m attacked?

Attackers continue targeting VoIP infrastructure around the world. In our blog from last week, May I ask who’s calling, please? A recent rise in VoIP DDoS attacks, we reviewed how the SIP protocol works, ways it can be abused, and how Cloudflare can help protect against attacks on VoIP infrastructure without impacting performance.

Cloudflare’s network stands in front of some of the largest, most performance-sensitive voice and video providers in the world, and is uniquely well suited to mitigating attacks on VoIP providers.

Because of the sustained attacks we are observing, we are sharing details on recent attack patterns, what steps they should take before an attack, and what to do after an attack has taken place.

Below are three of the most common questions we’ve received from companies concerned about attacks on their VoIP systems, and Cloudflare’s answers.

Question #1: How is VoIP infrastructure being attacked?

The attackers primarily use off-the-shelf booter services to launch attacks against VoIP infrastructure. The attack methods being used are not novel, but the persistence of the attacker and their attempts to understand the target’s infrastructure are.

Attackers have used various attack vectors to probe the existing defenses of targets and try to Continue reading

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VMworld 2021: VMware to pack more security into NSX

When it comes to protecting data-center-based resources in the highly distributed world, traditional security hardware and software components just aren’t going to cut it.That’s the bottom line for enterprises as they move to distributed digital environments according to Tom Gillis, senior vice president and general manager of VMware’s networking & advanced security business group. The idea is that security needs to be put deep into the infrastructure fabric and protect workloads across their lifecycle, Gillis said during an interview with Network World at the company’s VMworld virtual conference.To read this article in full, please click here