Networking Archives - Page 823 of 3484

Integration Woes Throw Monkey Wrench Into Open RAN

“The elephant in the room with regards to open RAN is, of course, integration,” said Patrick...

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Legacy Open Switch 0.4.0 Image

The Open Switch 0.4.0 is the legacy Open Switch version with Cisco like CLI that I used to use in my tutorials. As it can be downloaded anymore, I share the VMDK image below. Please, use the image for learning or demonstration purpose only because this Open Switch version is discontinued. Instead, use the Open Switch […]
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Solving the Ingress Mystery Puzzle

Last week I posted a tweet about a Kubernetes networking puzzle. In this post, we’ll go over the details of this puzzle and uncover the true cause and motive of the misbehaving ingress.

Puzzle recap

Imagine you have a Kubernetes cluster with three namespaces, each with its own namespace-scoped ingress controller. You’ve created an ingress in each namespace that exposes a simple web application. You’ve checked one of them, made sure it works and moved on to other things. However some time later, you get reports that the web app is unavailable. You go to check it again and indeed, the page is not responding, although nothing has changed in the cluster. In fact, you realise that the problem is intermittent - one minute you can access the page, and on the next refresh it’s gone. To make things worse, you realise that similar issues affect the other two ingresses.

If you feel like you’re capable of solving it on your own, feel free to follow the steps in the walkthrough, otherwise, continue on reading. In either case, make sure you’ve setup a local test environment so that it’s easier to follow along:

Clone the ingress-puzzle repo:
```
git clone  Continue reading
```

A DNS view of Lockdown

Over the past couple of decades, we've constructed two quite distinct online environments. There is the enterprise network which is commonly encountered at physical workplaces, and there is the consumer network which has been deployed across residential domains. The result is that many observed characteristics of the network have patterns that reflected the differences between these work and home environments. But what happened when the at-work workforce was sent home to work? What can the DNS tell us about the Lockdown?

Bell Launches Canada’s Largest 5G Wireless Network

MONTRÉAL, June 11, 2020 /CNW Telbec/ – Bell today announced the launch of Canada’s...

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Changes in Intel’s Technology, Systems Architecture and Client Group

Jim Keller to Depart Intel; New Leaders Named SANTA CLARA, Calif., June 11, 2020 – Today, Intel...

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Lanner Electronics Partners With Trilogy Networks to Join the Rural Cloud Initiative

Lanner’s WhiteboxSolutions™ and its Ecosystem Partners Now Join Trilogy’s Distributed...

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Daily Roundup: Cryptominers Attack Azure

Cryptominers attacked Azure; Amazons custom Graviton2 chips landed in in AWS EC2; and SDxCentral's...

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Weekend Reads 061120

Mapping the Internet’s topology improves our understanding of its interconnectivity, and thus its robustness and resilience. One of the best ways to do this is to capture data at the router level; it provides the greatest detail of the physical infrastructure of the Internet. —Kevin Vermeulen

A number of groups are using different approaches to measure Internet outages, including active probing of most of the IPv4 Internet, and passive observation of traffic. Our group at the Information Sciences Institute of the University of Southern California (USC/ISC), developed Trinocular, a system that pings millions of /24 IPv4 blocks every 11 minutes (since October 2014). —Guillermo Baltra

Benefits like wearing pajama bottoms to work and going for a mid-day run can be mitigated by the costs to your motivation, self-confidence, and self-esteem when you no longer hear “you aced it!” from your boss on the walk back from a client meeting, or when you can’t get a high-five in the coffee room from a teammate — or even a smile from the receptionist on your way to the elevator. —Deborah Grayson Riegel

It’s a truism that in computing, the easiest way in the door is with a general-purpose computer, but when Continue reading

Heavy Networking 523: OneOncology Boosts WAN Security, Availability With Silver Peak Unity EdgeConnect SD-WAN (Sponsored)

Today's Heavy Networking podcast focuses on a real-world SD-WAN deployment with OneOncology. The organization deployed an SD-WAN solution from Silver Peak, our sponsor for today's podcast, to securely segment and prioritize electronic medical records over other WAN traffic, get better service quality for critical voice and video applications, and ensure the WAN was highly available. Our guests are Robert Holloway, Infrastructure Manager at OneOncology; and Damon Ennis, SVP of Products at Silver Peak.

The post Heavy Networking 523: OneOncology Boosts WAN Security, Availability With Silver Peak Unity EdgeConnect SD-WAN (Sponsored) appeared first on Packet Pushers.

Heavy Networking 523: OneOncology Boosts WAN Security, Availability With Silver Peak Unity EdgeConnect SD-WAN (Sponsored)

Amazon’s Custom Graviton2 Chips Arrive in AWS EC2

Plus, AMD’s second-generation EPYC processors are available on Amazon's Elastic Compute Cloud.

Security and Salt

One of the things I picked up during the quarantine is a new-found interest in cooking. I’ve been spending more time researching recipes and trying to understand how my previous efforts to be a four-star chef have fallen flat. Thankfully, practice does indeed make perfect. I’m slowly getting better , which is to say that my family will actually eat my cooking now instead of just deciding that pizza for the fourth night in a row is a good choice.

One of the things I learned as I went on was about salt. Sodium Chloride is a magical substance. Someone once told me that if you taste a dish and you know it needs something but you’re not quite sure what that something is, the answer is probably salt. It does a lot to tie flavors together. But it’s also a fickle substance. It has the power to make or break a dish in very small amounts. It can be the difference between perfection and disaster. As it turns out, it’s a lot like security too.

Too Much is Exactly Enough

Security and salt are alike in the first way because you need the right amount to make things work. Continue reading

Exploding Security Perimeter, Remote Worker Ramp Spotlights SD-WAN Limits

Security perimeters have exploded as more than 100 million Americans found themselves setting up...

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Is 5G Really More Secure? It’s Complicated

5G isn’t a cure all, nor does it somehow build a fortress to blunt any nefarious attempts to do...

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DevAsc – Some Handy Linux Commands

Introduction

Linux is becoming more and more prominent in the networking industry. Many of us come from a mixed background and have varying levels of knowledge of Linux. I’ve been around Linux for a long time but really never got beyond the very most basic stuff. Looking back, I wish I had spent some more time learning Sed, Awk, regex, and Bash etc. I was doing some labs over at NRE Labs (great labs), and wanted to highlight some of the things I learned.

Appending To a File With Cat

Sometimes you want to append something quickly to a file or send several lines of text to a Linux command. That can be done using “here documents“.

First, look at this small configuration:

daniel@devasc:~/DevAsc$ cat config.txt 
interface GigabitEthernet0/1
 switchport mode access
 switchport access vlan 10
!
interface GigabitEthernet0/2
 switchport mode access
 switchport access vlan 10
!
interface GigabitEthernet0/3
 switchport mode access
 switchport access vlan 10
!

Now we want to append another interface to the end of this file. We can do that using cat:

daniel@devasc:~/DevAsc$ cat <<EOT >> config.txt 
> interface GigabitEthernet0/4
>  switchport mode access
>  switchport access vlan 10
> !
> EOT

After the cat command, Continue reading

Cloud-Native Security Remains a Complex Organism

“It’s natural that the security factors become critical because now they're suddenly very large...

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Health Check Analytics and how you can use it

At the end of last year, we introduced Standalone Health Checks - a service that lets you monitor the health of your origin servers and avoid the need to purchase additional third party services. The more that can be controlled from Cloudflare decreases maintenance cost, vendor management, and infrastructure complexity. This is important as it ensures you are able to scale your infrastructure seamlessly as your company grows. Today, we are introducing Standalone Health Check Analytics to help decrease your time to resolution for any potential issues. You can find Health Check Analytics in the sub-menu under the Traffic tab in your Cloudflare Dashboard.

As a refresher, Standalone Health Checks is a service that monitors an IP address or hostname for your origin servers or application and notifies you in near real-time if there happens to be a problem. These Health Checks support fine-tuned configurations based on expected codes, interval, protocols, timeout and more. These configurations enable you to properly target your checks based on the unique setup of your infrastructure. An example of a Health Check can be seen below which is monitoring an origin server in a staging environment with a notification set via email.

Once you set Continue reading

Field Engineering and COVID19

First posted in Human Infrastructure Magazine in April 2020 – a free email newsletter from the Packet Pushers. Subscribe here. How does business operate when the pandemic lockdown ‘ends’ and how does it impact you ? COVID19 won’t be gone, its gonna be months before a new ‘normal’ emerges. Getting back to work means close […]

The post Field Engineering and COVID19 appeared first on EtherealMind.

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