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Category Archives for "Networking"

Hybrid mesh firewall platforms gain interest as management challenges intensify

As enterprise networks get more complex, so do the firewall deployments.There are on-premises firewalls to manage, along with firewalls that are deployed in virtual machines and firewalls deployed in containers. There are firewalls for clouds and firewalls for data centers, firewalls for network perimeters, and firewalls for distributed offices. According to Gartner, by 2026, more than 60% of organizations will have more than one type of firewall deployment."A firewall used to be a box or a chasse with multiple cards," says Omdia analyst Fernando Montenegro. "Then we had a firewall in a virtual machine. And now we have a container form factor for a firewall because customers are deploying containers. And, oh, we need firewalls-as-a-service to support SASE."To read this article in full, please click here

Hybrid mesh firewall platforms gain interest as management challenges intensify

As enterprise networks get more complex, so do the firewall deployments.There are on-premises firewalls to manage, along with firewalls that are deployed in virtual machines and firewalls deployed in containers. There are firewalls for clouds and firewalls for data centers, firewalls for network perimeters, and firewalls for distributed offices. According to Gartner, by 2026, more than 60% of organizations will have more than one type of firewall deployment."A firewall used to be a box or a chasse with multiple cards," says Omdia analyst Fernando Montenegro. "Then we had a firewall in a virtual machine. And now we have a container form factor for a firewall because customers are deploying containers. And, oh, we need firewalls-as-a-service to support SASE."To read this article in full, please click here

Predicting and Surviving Correlated Failures Redundancy

In this archived panel discussion, Frank Ohlhorst, Henry Sow, and Stephen Lawton connect to deliver an in-depth conversation detailing the need for 'Predicting and Surviving Correlated Failures Redundancy' during our 'Network Resilience Boot Camp' presented by Data Center Knowledge and Network Computing. This excerpt is from our live 'Network Resilience Boot Camp' virtual event moderated by Bonnie D. Graham.

Hybrid workforce demands change from network ops

The pandemic forced businesses to send employees home to work, but even in recovery, the workforce trend is going strong. Some remote work measures were considered a temporary fix, and now the hybrid work reality demands IT organizations reassess how they can deliver consistent support, service, and technology to employees wherever they decide to work.“There have been a lot of conversations about return to work, but it’s not really happening,” said Shamus McGillicuddy, vice president of research at Enterprise Management Associates, during a recent webinar.To read this article in full, please click here

Hiding from history on Linux

Linux shells like bash have a convenient way of remembering commands that you type, making it easy to run them again without having to retype them. Just use the history command (which is a bash built-in) and then use an exclamation point followed by the number shown in front of the command in the history command output that you want to rerun. Alternatively, you can back up to that command by pressing the up arrow key as many times as needed to reach that command and then press return. Don’t forget, though, that you can also set up commands you are likely to use often as aliases by adding a line like this to your ~/.bashrc file so that you don’t need to search for them in your command history. Here’s an example:To read this article in full, please click here

Hiding from history on Linux

Linux shells like bash have a convenient way of remembering commands that you type, making it easy to run them again without having to retype them. Just use the history command (which is a bash built-in) and then use an exclamation point followed by the number shown in front of the command in the history command output that you want to rerun. Alternatively, you can back up to that command by pressing the up arrow key as many times as needed to reach that command and then press return. Don’t forget, though, that you can also set up commands you are likely to use often as aliases by adding a line like this to your ~/.bashrc file so that you don’t need to search for them in your command history. Here’s an example:To read this article in full, please click here

Backblaze sees rise in hard drive failure rates

The latest quarterly report from Backblaze on hard drive reliability reveals a rise in failures among certain drives.Backblaze is a pure storage provider; cloud storage is all they do, and they dig deep into the statistics of hard drive failure and share their data with the industry. The company currently has a massive inventory of 241,297 hard disk drives of varying capacities and from various brands. (In recent quarters, Backblaze has added SSD performance to its measurements, but SSDs are still early in their deployment lifecycle, so patterns over time have yet to fully emerge.)To read this article in full, please click here

ECL set to build modular, hydrogen-powered data centers

ECL has announced what it says will be the world’s first modular, sustainable, off-grid data center that uses hydrogen as its primary power source, promising carbon neutral performance and 99.9999% uptime.Modular data centers are designed to go together like building blocks, allowing companies to start small and grow as their capacity needs increase. The ECL data centers will come in 1 megawatt blocks.ECL's data-center-as-a-service offering is geared primarily to mid-sized data center operators, as well as large companies with a mix of cloud and on-premises IT environments. It claims its data centers will have a total cost of ownership that's two-thirds of what a traditional colocation data center environment would cost when measured over five years.To read this article in full, please click here

ECL set to build modular, hydrogen-powered data centers

ECL has announced what it says will be the world’s first modular, sustainable, off-grid data center that uses hydrogen as its primary power source, promising carbon neutral performance and 99.9999% uptime.Modular data centers are designed to go together like building blocks, allowing companies to start small and grow as their capacity needs increase. The ECL data centers will come in 1 megawatt blocks.ECL's data-center-as-a-service offering is geared primarily to mid-sized data center operators, as well as large companies with a mix of cloud and on-premises IT environments. It claims its data centers will have a total cost of ownership that's two-thirds of what a traditional colocation data center environment would cost when measured over five years.To read this article in full, please click here

Containerlab dashboard

The GitHub sflow-rt/containerlab project contains example network topologies for the Containerlab network emulation tool that demonstrate real-time streaming telemetry in realistic data center topologies and network configurations. The examples use the same FRRouting (FRR) engine that is part of SONiC, NVIDIA Cumulus Linux, and DENT network operating systems. Containerlab can be used to experiment before deploying solutions into production. Examples include: tracing ECMP flows in leaf and spine topologies, EVPN visibility, and automated DDoS mitigation using BGP Flowspec and RTBH controls.
The screen capture at the top of this article shows a real-time dashboard displaying up to the second traffic analytics gathered from the 5 stage Clos fabric shown above. This article walks through the steps needed to run the example. 
git clone https://github.com/sflow-rt/containerlab.git
cd containerlab
./run-clab
Run the above commands to download the project and run Containerlab on a system with Docker installed. Docker Desktop is a conventient way to run the labs on a laptop.
containerlab deploy -t clos5.yml
Start the emulation. 
./topo.py clab-clos5
Post topology to sFlow-RT REST API. Connect to http://localhost:8008/app/containerlab-dashboard/html/ to access the Dashboard shown at the top of this article. 
docker exec -it clab-clos5-h1 iperf3 -c 172.16. Continue reading

Network Break 442: HashiCorp Swaps Open Source For BSL; Open Enterprise Linux Goes After RHEL

Today on Network Break we discuss big moves in open source, including HashiCorp switching from an open source license to "business source" and Red Hat competitors banding together to offer an alternative to Red Hat Enterprise Linux (RHEL). We also discuss Google's odd attempt to get employees back to the office by charging them to stay at an on-campus hotel.

The post Network Break 442: HashiCorp Swaps Open Source For BSL; Open Enterprise Linux Goes After RHEL appeared first on Packet Pushers.

Network Break 442: HashiCorp Swaps Open Source For BSL; Open Enterprise Linux Goes After RHEL

Today on Network Break we discuss big moves in open source, including HashiCorp switching from an open source license to "business source" and Red Hat competitors banding together to offer an alternative to Red Hat Enterprise Linux (RHEL). We also discuss Google's odd attempt to get employees back to the office by charging them to stay at an on-campus hotel.

Wasm core dumps and debugging Rust in Cloudflare Workers

Wasm core dumps and debugging Rust in Cloudflare Workers
Wasm core dumps and debugging Rust in Cloudflare Workers

A clear sign of maturing for any new programming language or environment is how easy and efficient debugging them is. Programming, like any other complex task, involves various challenges and potential pitfalls. Logic errors, off-by-ones, null pointer dereferences, and memory leaks are some examples of things that can make software developers desperate if they can't pinpoint and fix these issues quickly as part of their workflows and tools.

WebAssembly (Wasm) is a binary instruction format designed to be a portable and efficient target for the compilation of high-level languages like Rust, C, C++, and others. In recent years, it has gained significant traction for building high-performance applications in web and serverless environments.

Cloudflare Workers has had first-party support for Rust and Wasm for quite some time. We've been using this powerful combination to bootstrap and build some of our most recent services, like D1, Constellation, and Signed Exchanges, to name a few.

Using tools like Wrangler, our command-line tool for building with Cloudflare developer products, makes streaming real-time logs from our applications running remotely easy. Still, to be honest, debugging Rust and Wasm with Cloudflare Workers involves a lot of the good old time-consuming and Continue reading

Kubernetes 005. Overview of MicroK8s from Canonical (Ubuntu-folks).

Dear friend,

This year I had a pleasure and privilege to attend KubeCon Europe 2023 and this was the first time I’ve heard about MicroK8s. That sounded interesting and I decided I shall experiment with it and write a blogpost; but it didn’t catch my attention to a degree that I put it on top of my list; instead, I’ve put it to back burner. The last week I was talking to a colleagues of mine, who told me that he needs to test something in his production Kubernetes at home. I was quite interested, what does the one mean by “production Kubernetes cluster at home” and it appeared to be MikroK8s. At this stage I though, I don’t have any more excuses, so I just should sit and write it.

Is Kubernetes Used in Network Automation?

It is, indeed. The last week when we posted a blog about starting programming in C we got an interesting discussion in LinkedIn about Go vs Python with one right-honorable gentleman, who rightfully suggested that one of the main weaknesses of Python is that it requires to install dependencies on the host before you can use application. However, to be brutally honest, many Continue reading

Measuring the Use of DNSSEC

It's challenging to measure the uptake of DNSSEC in the DNS. There are just so many aspects of the DNS that are occluded from view! How many DNS names are there in the DNS? How many of these are signed? How many queries are processed by DNS infrastructure? How many queries add DNSSEC validcation. We present a new measurement here which is a query-weighted view of the DNS, looking the amount of queries for DNS names that are DNSSEC-signed as a proportion of the total query load.
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