Introducing Fast, Automated Packet Capture for Kubernetes
If you’re an SRE or on a DevOps team working with Kubernetes and containers, you’ve undoubtedly encountered network connectivity issues with your microservices and workloads. Something is broken and you’re under pressure to fix it, quickly. And so you begin the tedious, manual process of identifying the issue using the observability tools at your disposal…namely metrics and logs. However, there are instances where you may need to go beyond these tools to confirm a potential bug with applications running in your cluster.
Packet capture is a valuable technique for debugging microservices and application interaction in day-to-day operations and incident response. But generating pcap files to diagnose connectivity issues in Kubernetes clusters can be a frustrating exercise in a dynamic environment where hundreds, possibly thousands of pods are continually being created and destroyed.
First, you would need to identify on which node your workload is running, match your workload against its host-based interface, and then (with root access to the node) use tcpdump to generate a file for packet analysis. Then you would need to transfer the pcap files to your laptop and view them in Wireshark. If this doesn’t initially generate the information you need to identify and resolve the Continue reading
Key Features to Look for in a Remote Network Management Tool
As network administration products and services flood the market, here are the essential capabilities you should check for.History of Cable Networks with Rouzbeh Yassini
Cable networks account for the majority of the connectivity at the network edge. Given we started with dial-up over plain old telephone lines, and then with DSL, and were promised “ATM to the home,” how did cable networks grab the edge? Rouzbeh Yassini joins Russ White and Donald Sharp to give us the history of cable networks.
My Cisco DevNet Core Exam Journey
On 23 October 2020, I took and passed the Cisco Certified DevNet Professional Core exam (350-901 DEVCOR) on my first attempt. I explain here the resources I used to study and pass this exam. My background and experience Before I explain what and how I have studied, you need to understand what I already knew, what was my background and experience with some of the topics of the exam before I started to study for it. At the end of April 2018, I already passed a Cisco specialist certification on…
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Bienvenue Cloudflare France! Why I’m helping Cloudflare grow in France
If you'd like to read this post in French click here.
I am incredibly excited to announce that I have joined Cloudflare as its Head of France to help build a better Internet and expand the company’s growing customer base in France. This is an important milestone for Cloudflare as we continue to grow our presence in Europe. Alongside our London, Munich, and Lisbon offices, Paris marks the fourth Cloudflare office in the EMEA region. With this, we’ll be able to further serve our customers’ demand, recruit local talent, and build on the successes we’ve had in our other offices around the globe. I have been impressed by what Cloudflare has built in EMEA including France, and I am even more excited by what lies ahead for our customers, partners, and employees.
Born in Paris and raised in Paris, Normandie and Germany, I started my career more than 20 years ago. While a teenager, I had the chance to work on one of the first Apple IIe’s available in France. I have always had a passion for technology and continue to be amazed by the value of its adoption with businesses large and small. In former roles as Solution Engineer Continue reading
Fast Failover: The Challenge
Sometimes you’re asked to design a network that will reroute around a failure in milliseconds. Is that feasible? Maybe. Is it simple? Absolutely not.
In this series of blog posts we’ll start with the basics, explore the technologies that you can use to reach that goal, and discover one or two unexpected rabbit holes.
Fast failover is just one of the topics we’ll discuss in Advanced Routing Protocol Features part of How Networks Really Work webinar.
Future Proof Your Investments with 5G
The 5G future is full of employees who are empowered to truly work and stay connected from anywhere. How will you get started today?Tech Bytes: Nation-Wide Dentistry Network Chooses Integrated SD-WAN, SD-Branch, Security With Fortinet (Sponsored)
Today’s Tech Bytes, sponsored by Fortinet, explores an SD-WAN deployment with Smile Brands, a nation-wide network of dental practices. Smile Brands started with one SD-WAN product and then switched to an integrated security, SD-WAN, and SD-Branch solution with Fortinet. Our guest is Brett Stetzko, Senior Network Engineer at Smile Brands.
The post Tech Bytes: Nation-Wide Dentistry Network Chooses Integrated SD-WAN, SD-Branch, Security With Fortinet (Sponsored) appeared first on Packet Pushers.
COVID-19 Cyberthreat and Malware Updates
It has been over three months since our last report on COVID-19–themed attacks [1]. During this period, the tragedy of the COVID-19 pandemic has continued to dominate our daily livesfe. On the digital virus side, sSince our lastthat report [1, ] we’ have been closely tracking the cyberthreat landscape that leveraging leverages the COVID-19 themes. In the last report, we discovered that the majority of the attacks were involved infostealers. The oIn observations made from over the past two months, witnessed similar infostealers1 as reported in [ again played a key role1]. HoweverIn the meanwhile, we also detected other threats not that we hadn’t seen earlier, such as the Emotet campaign and remote access Trojan (RAT) attacks.
In this blog post, we first present the our most recent telemetry data, as reported by some VMware customers,, in order to exhibit highlight the diversity and magnitude of the attacks. Next, we investigate the Emotet campaign, as it is the most dominant wave seen in this period. More specifically, we analyze one of the samples from the campaign to reveal the tactics, techniques, and procedures (TTPs) used in the attack, and discuss how the Emotet payload variant is different from the one we reported recently [2].2
The post COVID-19 Cyberthreat and Malware Updates appeared first on Network and Security Virtualization.
Network Break 309: Arista Rolls Out New Campus Switches; Financial Reporting Roundup
Guest commentator Johna Till Johnson, CEO of Nemertes Research, brings her analytical eye to this week's Network Break. Coverage includes new Arista campus switches, a Dutch telco shutting down legacy TDM systems, Google Chrome getting its own certificate store, and a massive Bitcoin seizure.
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Technical Debt (or Is Future Proofing Even a Good Idea?)
What, really, is “technical debt?” It’s tempting to say “anything legacy,” but then why do we need a new phrase to describe “legacy stuff?” Even the prejudice against legacy stuff isn’t all that rational when you think about it. Something that’s old might also just be well-tested, or well-worn but still serviceable. Let’s try another tack.
Technical debt, in the software world, can be defined as working on a piece of software for long periods of time by only adding features, and never refactoring or reorganizing the code to meet current conditions. The general idea is that as new features are added on top of the old, two things happen. First, the old stuff becomes a sort of opaque box that no-one understands. Second, the stuff being added to the old increasingly relies on public behavior that might be subject to unintended consequences or leaky abstractions.
To resolve this problem in the software world, software is “refactored.” In refactoring, every use of a public API is examined, including what information is being drawn out, or what the expected inputs and outputs are. The old code is then “discarded,” in a sense, and a new underlying function written Continue reading
The Week in Internet News: Facebook Considers New Ways to Combat Disinformation
More moderation: Facebook is looking at new ways to moderate posts on its site to make it more difficult for election disinformation to spread, the New York Times reports. Facebook is looking at adding more “friction,” such as an additional click or two, before users can share posts, according to insiders in the company. The new measures were expected shortly.
Millions without access: About 63 percent of rural residents in Latin America and the Caribbean – 77 million people – have little or no access to Internet services, according to a study by the Inter-American Development Bank and Microsoft, Nearshore Americas says. By comparison, about 71 percent of urban residents in the region have access to the Internet.
Bracing for regulation: Residents of Nigeria are expecting the government to move to regulate social media after recent protests, Quartz Africa on Yahoo reports. “We must regulate social media in a manner that it does not become a purveyor of fake news and hate speech,” Nigeria’s minister of information Lai Mohammed said recently. “We will not fold our arms to allow purveyors of fake news and hate speech to use the social media to destabilize the country.”
Right to repair: Campaigners across Continue reading
Marc Andreessen | Time to Build
Join our hosts as they unravel today’s challenging culture with Marc Andreessen, creator of the first web browser and co-founder of venture capital firm Andreessen Horowitz.
Heidi Roizen | How Networking is Changing Networking
Brandon and Derick explore the connection between computer networking technology and people in this interview with venture capitalist and entrepreneur Heidi Roizen.
Bob Metcalfe, Part 2 | Ethernet’s Impact and Your Own Personal Algorithm
A deeper dive with Bob Metcalfe on the lasting impact of Ethernet and the World Wide Web. What’s in store for the world next?
Bob Metcalfe, Part 1 | Insider Stories from Early Silicon Valley
Podcast co-hosts Derick and Brandon explore the early days of Silicon Valley with Bob Metcalfe, inventor of Ethernet technology.