News Category: Networking

Wi-Fi Security Is Starting to Get its Biggest Upgrade in Over a Decade

Wi-Fi devices have been using the same security protocol for over a decade. But today, that’ll begin to change: the Wi-Fi Alliance, which oversees adoption of the Wi-Fi standard, is beginning to certify products that support WPA3, the successor to the WPA2 security protocol that’s been in use since...
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Netdev Day 1: IPsec!

Today at the conference I learned a lot about IPsec, so we’re going to talk about IPsec! There was an IPsec workshop given by Sowmini Varadhan and Paul Wouters. All of the mistakes in this post are 100% my fault though :). what’s IPsec? IPsec is a protocol used to encrypt IP packets. Some VPNs are...
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A SysAdmin's Guide to Network Management

If you're a sysadmin, your daily tasks include managing servers and the data center's network. The following Linux utilities and commands—from basic to advanced—will help make network management easier. In several of these commands, you'll see <fqdn>, which stands for "fully qualified domain...
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Last Chance to Speak at Hyperledger Global Forum | Deadline is This Friday

Hyperledger Global Forum is the premier event showcasing the real uses of distributed ledger technologies for businesses and how these innovative technologies run live in production networks today. Hyperledger Global Forum unites the industry’s most respected thought leaders, domain experts, and...
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Anatomy of a Linux DNS Lookup – Part I

Since I work a lot with clustered VMs, I’ve ended up spending a lot of time trying to figure out how DNS lookups work. I applied ‘fixes’ to my problems from StackOverflow without really understanding why they work (or don’t work) for some time. Eventually I got fed up with this and decided to...
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6 RFCs for Understanding How the Internet Works

Reading the source is an important part of open source software. It means users have the ability to look at the code and see what it does. But "read the source" doesn't apply only to code. Understanding the standards the code implements can be just as important. These standards are codified in...
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Containers Break the Shared Responsibility Model Between Cloud Providers and Ops

Last month, a critical vulnerability in the basic Linux network infrastructure was discovered by Felix Wilhelm from Google’s Security Team and disclosed by Red Hat product security. The attack exploits a problem in the processing of Dynamic Host Configuration Protocol (DHCP) messages, which is the...
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How I use Wireshark

Hello! I was using Wireshark to debug a networking problem today, and I realized I’ve never written a blog post about Wireshark! Wireshark is one of my very favourite networking tools, so let’s fix that :) Wireshark is a really powerful and complicated tool, but in practice I only know how to do a...
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Finding IT Professionals With SDN Skills Remains a Struggle

With any major technology transition there is a gap between the time when the innovation is created and when there is a critical mass of IT professionals available with training and knowledge on how to deploy that state-of-the-art technology. Although software-defined networking (SDN) and network...
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What is SDN? How Software-Defined Networking Changed Everything

The internet began as a system for applying addresses to servers. Now it's a means for giving names to services, and distributing those services across the planet. SDN gave rise to a new way of implementing computing on the broadest scale of infrastructure, and has become, for better or worse, the...
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