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Exploratory Network Analysis (XNA)

In data science there is a concept called Exploratory Data Analysis (EDA). When I have a big bunch of data, what’s in it? How do I make sense of it? Where do I even start? Just simple statistics about the dataset are not enough. In data analysis, this led to...

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More FT8 propagation

Last month I graphed the distance to remote stations as a function of time of day.

Today I plotted the gridsquare locations on a world map:

Ignore the top right one. That’s “RR73”, and not a real grid square. The rest should be accurate.

More that can be done (more interesting with more data than I can get, though):

• also take into account the received signal strength
• …and number of unique callsigns per grid square
• create animations over time

If I had access to the data from pskreporter I could even, instead of using just a callsign as input data, use a grid square as input.

So for example I could create an animation to show what the propagation was over the last week from any given gridsquare, and generate them on-demand.

Like last time the scripts are pretty hacky proof of concepts. But they work.

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Verizon launches 5G fixed wireless in parts of 21 more cities

Communications giant Verizon last week launched 5G for Business Internet in 21 new markets, targeting SMBs and enterprises alike. 5G resources What is 5G? Fast wireless technology for enterprises and phones 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 The fixed-wireless plans provide download speeds of 100Mbps ($69/month), 200Mbps ($99/month), and 400Mbps ($199/month) with no data limits. Upload speeds are slower. Verizon is also offering a 10-year price lock for new customers with no long-term contract required.To read this article in full, please click here

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Linux commands for testing connectivity and transfer rates

There are quite a few tools that can help test your connectivity on the Linux command line. In this post, we'll look at a series of commands that can help estimate your connection speed, test whether you can reach other systems, analyze connection delays, and determine whether particular services are available.ping The ping command is the simplest and most often used command for doing basic connectivity testing. It sends out packets called echo requests and are packets that request a response. The command looks for the responses and displays them along with how long each response took and then reports what percentage of the requests were answered.To read this article in full, please click here

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Linux commands for testing connectivity and transfer rates

There are quite a few tools that can help test your connectivity on the Linux command line. In this post, we'll look at a series of commands that can help estimate your connection speed, test whether you can reach other systems, analyze connection delays, and determine whether particular services are available.ping The ping command is the simplest and most often used command for doing basic connectivity testing. It sends out packets called echo requests and are packets that request a response. The command looks for the responses and displays them along with how long each response took and then reports what percentage of the requests were answered.To read this article in full, please click here

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3 IT Monitoring Trends for 2021

By being aware of – and anticipating – these three trends in IT monitoring, DevOps and SREs can be better prepared to effectively troubleshoot performance issues and improve business outcomes.

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Full Stack Journey 053: Exploring Developer Advocacy And Developer Relations

Today's Full Stack Journey delves into developer advocacy: what is it, why do organizations have this role, and what makes a good developer advocate? Host Scott Lowe has invited four practitioners to tackle these questions. He speaks with Jacquie Grindrod, Jeremy Meiss, Josh Wulf, and Ted Neward.

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Full Stack Journey 053: Exploring Developer Advocacy And Developer Relations

Today's Full Stack Journey delves into developer advocacy: what is it, why do organizations have this role, and what makes a good developer advocate? Host Scott Lowe has invited four practitioners to tackle these questions. He speaks with Jacquie Grindrod, Jeremy Meiss, Josh Wulf, and Ted Neward.

The post Full Stack Journey 053: Exploring Developer Advocacy And Developer Relations appeared first on Packet Pushers.

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LinuxKit as a Commodity for Building Linux Distributions

Guest post by Docker Captain Gianluca Arbezzano

Recently Corey Quinn from LastWeekInAWS wrote an article that made me think “Nobody Cares About the Operating System Anymore”. Please have a look at it! I like the idea that nobody cares about where their application runs. Developers only want them running.

A bit of context about Tinkerbell

I am one of the maintainers for the Tinkerbell project. A bare metal workflows engine that heavily relies on containers and Docker to get its work done. It tries to find an answer for a reasonable question: how do we manage rooms of pieces of hardware? More in practice, how can we bring an API on top of everybody’s data centers?

Containers are the abstraction we decided to use when running reusable code (that we call actions) in somebody else’s hardware. Mainly because distribution, packaging, and runtime are solved issues. Everyone knows how to build, push and run a container.

I think this scenario compares well with the story Corey highlighted. Operating systems are an established, well-known abstraction for the majority of the use cases.

The special operating system for bare metal provisioning

The lifecycle of a bare metal server can be summarised as follows:

1. Continue reading

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Announcing Cloudflare Images beta to simplify your image pipeline

Today, we are announcing the beta of Cloudflare Images: a simple service to store, resize, optimize, and deliver images at scale.

In 2018, we launched Stream to provide a single product that could be used to store, encode, and deliver videos. With Cloudflare Images, we are doing for images what Stream did for videos. Just like Stream, Cloudflare Images eliminates the need to think about storage buckets, egress costs, and many other common problems that are solved for you out of the box. Whether you are building an ecommerce platform with millions of high-res product pictures and videos or a new app for creators, you can build your entire media pipeline by combining Cloudflare Images and Stream.

Fundamental questions for storing and serving images

Any time you are building infrastructure for image storage and processing, there are four fundamental questions you must answer:

1. “Where do we store images?”
2. “How do we secure, resize, and optimize the images for different use cases?”
3. “How do we serve the images to our users reliably?”
4. “How do we do all of these things at scale while having predictable and affordable pricing, especially during spikes?”

Cloudflare Images has a straightforward set Continue reading

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VMware bundles support for the branch-of-one workforce

VMware has unveiled an integrated package of cloud security, access control and networking software aimed at addressing the key needs of today's COVID-19-driven remote workforce.VMware Anywhere Workspace brings together the company’s core enterprise software products, including its Workspace ONE unified endpoint management, Carbon Black Cloud cloud-native endpoint security, and secure access service edge (SASE) components, into a single system to support a widely distributed workforce. Read more: Who's selling SASE, and what do you get? "Enterprises are moving from simply supporting remote work to becoming distributed, anywhere organizations. Companies are rethinking where teams work, how they work, and how they support customers from wherever they are," Sanjay Poonen, chief operating officer, customer operations with VMware, wrote in a blog about the announcement. "To be successful, this means investing in technology and a long-term strategy to be a stronger, more focused and more resilient organization."  To read this article in full, please click here

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VMware bundles support for the branch-of-one workforce

VMware has unveiled an integrated package of cloud security, access control and networking software aimed at addressing the key needs of today's COVID-19-driven remote workforce.VMware Anywhere Workspace brings together the company’s core enterprise software products, including its Workspace ONE unified endpoint management, Carbon Black Cloud cloud-native endpoint security, and secure access service edge (SASE) components, into a single system to support a widely distributed workforce. Read more: Who's selling SASE, and what do you get? "Enterprises are moving from simply supporting remote work to becoming distributed, anywhere organizations. Companies are rethinking where teams work, how they work, and how they support customers from wherever they are," Sanjay Poonen, chief operating officer, customer operations with VMware, wrote in a blog about the announcement. "To be successful, this means investing in technology and a long-term strategy to be a stronger, more focused and more resilient organization."  To read this article in full, please click here

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The Future of Connectivity: Wi-Fi 6 and Smart Homes Explained

Wi-Fi has transformed the way we live, allowing us to work from any location, shop from the comfort of our armchairs, and benefit from a wide range of connected devices that would have been impossible if we were constrained by cables.The number of connected devices is growing faster than the number of global Internet users with  smart home devices like thermostats, smoke alarms and lighting systems making life more comfortable, safer, and more convenient.By 2023, Internet of Things (IoT) will account for half of the global device market and connected home applications will be the largest category. This is a huge opportunity for Communications Service Providers (CSPs) to offer additional services and generate revenues.To read this article in full, please click here

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Feedback Requested: Chartering the MANRS Community

While MANRS has gone from strength to strength since its beginning in 2014, gaining attention, interest, and credibility from network operators worldwide, for the initiative to be sustainable and impactful in the long run there should be a stronger sense of ownership by the community. MANRS is an industry-led initiative whose participants set and develop […]

The post Feedback Requested: Chartering the MANRS Community appeared first on Internet Society.

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Start building your own private network on Cloudflare today

Starting today, your team can create a private network on Cloudflare’s network. Team members click a single button to connect to private IPs in environments that you control. Cloudflare’s network routes their connection through a data center in one of over 200 cities around the world. On the other side, administrators deploy a lightweight software connector that replaces traditional VPN appliances.

Cloudflare’s private network combines IP level connectivity and Zero Trust controls. Thick clients like RDP software, SMB file viewers, or other programs can connect to the private IPs already in use in your deployment without any additional configuration. Coming soon, you’ll be able to layer additional identity-based network-level rules to control which users, from which devices, can reach specific IPs.

We are launching this feature as a follow-up to Cloudflare’s Developer Week because we are excited to give your development team, and your entire organization, a seamless platform for building and connecting your internal resources. We built this solution based on feedback from customers who want to move to a Zero Trust model without sacrificing some of the convenience of a private network.

We’re excited to give any team the ability to run their internal network on Cloudflare’s global Continue reading

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Using Unequal-Cost Multipath to Cope with Leaf-and-Spine Fabric Failures

Scott submitted an interesting the comment to my Does Unequal-Cost Multipath (UCMP) Make Sense blog post:

How about even Large CLOS networks with the same interface capacity, but accounting for things to fail; fabric cards, links or nodes in disaggregated units. You can either UCMP or drain large parts of your network to get the most out of ECMP.

Before I managed to write a reply (sometimes it takes months while an idea is simmering somewhere in my subconscious) Jeff Tantsura pointed me to an excellent article by Erico Vanini that describes the types of asymmetries you might encounter in a leaf-and-spine fabric: an ideal starting point for this discussion.

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Using Unequal-Cost Multipath to Cope with Leaf-and-Spine Fabric Failures

Scott submitted an interesting the comment to my Does Unequal-Cost Multipath (UCMP) Make Sense blog post:

How about even Large CLOS networks with the same interface capacity, but accounting for things to fail; fabric cards, links or nodes in disaggregated units. You can either UCMP or drain large parts of your network to get the most out of ECMP.

Before I managed to write a reply (sometimes it takes months while an idea is simmering somewhere in my subconscious) Jeff Tantsura pointed me to an excellent article by Erico Vanini that describes the types of asymmetries you might encounter in a leaf-and-spine fabric: an ideal starting point for this discussion.

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Water-authority network upgrade spots problems faster

The Albuquerque water authority says recent network upgrades give it greater visibility and control over its remote sites and makes for faster responses to leaks and other problems.The Albuquerque Bernalillo County Water Utility Authority manages more than 3,000 miles of water-supply pipeline covering more than 650,000 users. The authority manages 135 remote locations, which include well sites, tanks, and pump stations, all of which have programmable logic controllers (PLC) connected to a dedicated, fixed-wireless network running at 900MHz back to the core network.[Get regularly scheduled insights by signing up for Network World newsletters.] “The [main treatment] plant was built [about] 15 years ago,” said Kristen Sanders, the authority’s chief information security officer. “So if a piece of equipment went out, replacing it would be about shopping on eBay.” Also the authority’s fiber backbone that connects the sites with the main plant was past it’s service life and had to be replaced.To read this article in full, please click here

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Water-authority network upgrade spots problems faster

The Albuquerque water authority says recent network upgrades give it greater visibility and control over its remote sites and makes for faster responses to leaks and other problems.The Albuquerque Bernalillo County Water Utility Authority manages more than 3,000 miles of water-supply pipeline covering more than 650,000 users. The authority manages 135 remote locations, which include well sites, tanks, and pump stations, all of which have programmable logic controllers (PLC) connected to a dedicated, fixed-wireless network running at 900MHz back to the core network.[Get regularly scheduled insights by signing up for Network World newsletters.] “The [main treatment] plant was built [about] 15 years ago,” said Kristen Sanders, the authority’s chief information security officer. “So if a piece of equipment went out, replacing it would be about shopping on eBay.” Also the authority’s fiber backbone that connects the sites with the main plant was past it’s service life and had to be replaced.To read this article in full, please click here

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Get Smart About Cloud Networking – A Packet Pushers Livestream Event, April 22

There are lots of reasons to get educated about cloud networking. You might: Be responsible for connecting end users to numerous cloud services Have to link an application in Cloud A to services and data in Cloud B Support a hybrid application that has one foot in your DC and another in AWS, Azure, or […]

The post Get Smart About Cloud Networking – A Packet Pushers Livestream Event, April 22 appeared first on Packet Pushers.