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Category Archives for "Networking"

A look at Internet traffic trends during Super Bowl LVIII

After winning Super Bowl LVII in 2023, the Kansas City Chiefs entered Super Bowl LVIII with an opportunity to pull off back-to-back wins, a feat last achieved by the New England Patriots two decades earlier, in 2003 and 2004. They faced the San Francisco 49ers, five-time Super Bowl champions, although their last win was nearly three decades ago, in 1995. The game started slowly, remaining scoreless until the start of the second quarter, after which both teams traded the lead until a tie score at the end of the game made it only the second Super Bowl to go into overtime. And if you weren’t watching it for the football, the advertisements certainly didn’t disappoint. And if you weren’t watching it for the football or the advertisements, but instead were waiting to see how many times CBS cut away to a shot of Taylor Swift during the game, the answer is… 16. (By my count, at least.)

In this blog post, we will explore which Super Bowl advertisements drove the largest spikes in traffic, as well as examine how traffic to food delivery services, social media, sports betting, and video platform websites and applications changed during the game. In Continue reading

Cloudflare defeats patent troll Sable at trial

For almost seven years, Cloudflare has been fighting against patent trolls. We’ve been doing this successfully through the efforts of our own legal team, external counsel, and the extraordinary efforts of people on the Internet looking for prior art (and getting rewarded for it) through our Project Jengo.

While we refuse to pay trolls for their meritless claims, we’ve been happy to award prizes to Project Jengo participants who help stop the trolls through prior art that invalidates their patents or claims. Project Jengo participants helped us in the past roundly beat the patent troll Blackbird (who subsequently went out of business).

Today, we’re back to talk about yet another win thanks to a lot of work by us, our external counsel, and Project Jengo participants.

Sable

Last Thursday, on a clear, sunny morning in Waco, Texas, a jury returned a verdict after less than two hours of deliberation. The jury found that Cloudflare did not infringe the patent asserted against Cloudflare by patent trolls Sable IP and Sable Networks.

And while that would have been enough to decide the case by itself, the jury went further and found that Sable’s old and broadly-written patent claim was invalid and never Continue reading

Can We Skip the Network Layer?

I mentioned that you don’t need node addresses when dealing with only two entities. Now and then, someone tries to extend this concept and suggests that the network layer addressing isn’t needed if the solution is local. For instance, if we have a solution that is supposed to run only on a single Ethernet segment, we don’t need network layer addressing because we already have data link layer addresses required for Ethernet to work (see also: ATAoE).

Too often in the past, an overly ingenious engineer or programmer got the idea to simplify everyone’s life and use the data link layer addresses as the ultimate addresses of individual nodes. They would then put the transport layer on top of that to get reliable packet transport. Finally, put whatever application on top of the transport layer. Problem solved.

Read more …

Can We Skip the Network Layer?

I mentioned that you don’t need node addresses when dealing with only two entities. Now and then, someone tries to extend this concept and suggests that the network layer addressing isn’t needed if the solution is local. For instance, if we have a solution that is supposed to run only on a single Ethernet segment, we don’t need network layer addressing because we already have data link layer addresses required for Ethernet to work (see also: ATAoE).

Too often in the past, an overly ingenious engineer or programmer got the idea to simplify everyone’s life and use the data link layer addresses as the ultimate addresses of individual nodes. They would then put the transport layer on top of that to get reliable packet transport. Finally, put whatever application on top of the transport layer. Problem solved.

Read more …

DNS OARC 42

The DNS Operations, Analysis, and Research Center (DNS-OARC) brings together DNS service operators, DNS software implementors, and researchers together to share concerns, information and learn together about the operation and evolution of the DNS. They meet between two to three times a year in a workshops format. The most recent workshop was held in Charlotte, North Carolina in early February 2024. Here are my thoughts on the material that was presented and discussed at this workshop.

DNS OARC 42

The DNS Operations, Analysis, and Research Center (DNS-OARC) brings together DNS service operators, DNS software implementors, and researchers together to share concerns, information and learn together about the operation and evolution of the DNS. They meet between two to three times a year in a workshops format. The most recent workshop was held in Charlotte, North Carolina in early February 2024. Here are my thoughts on the material that was presented and discussed at this workshop.

Weekend Reads 020924


Artificial intelligence and the chips that fuel its evolution have given rise to a new arms race between the US and China.


Alongside concerning recent security news, there has been a media-wide rise of references to ‘credential stuffing’. This is a term that doesn’t convey very much, but as it’s the accepted term inside the infosec community, it’s probably here to stay.


In October, the Consumer Financial Protection Bureau (CFPB) proposed a set of rules that if implemented would transform how financial institutions handle personal data about their customers.


In a far cry from the early 2000s, most U.S. adults today say they use the internet (95%), have a smartphone (90%) or subscribe to high-speed internet at home (80%), according to a Pew Research Center survey conducted May 19 to Sept. 5, 2023.


Cloudflare was a victim of the wide-ranging Okta supply-chain campaign last fall, with a data breach impacting its Atlassian Bitbucket, Confluence, and Jira platforms beginning on Thanksgiving Day.


Honeypots are usually used as an intrusion detection tool. Many security researchers, including Computer Security Incident Response Teams (CSIRTS), deploy honeypots, to learn about tools, tactics, and the attacker’s infrastructure.


AWS could rake in between $400 million and Continue reading

Catalyst SD-WAN 20.13 – RBAC

Catalyst SD-WAN has supported Role Based Access Control (RBAC) for a long time. It has been possible to use predefined roles or create custom roles and defining what areas the user should have access to. However, before 20.13 it was not possible to define a scope. In large companies it’s quite common that one group manages one set of devices, for example all the sites in EU, all the sites in the US, etc. There may also be multiple business units within the company which may share some infrastructure but operate autonomously from each other where a BU should only have access to its own set of devices. As of 20.13, it is not possible to define scope when using RBAC in Catalyst SD-WAN.

There is another feature, called Network Hierarchy that is somewhat related to RBAC. When onboarding devices, you assign a Site ID to the device. The site is then assigned a name in the format of SITE_SiteID, for example SITE_10 when using a Site ID of 10. By default all sites belong to the global node as can be seen below:

Note that it says Auto-Generated site. It is possible to edit the site Continue reading

Boat design phase

I purposely bought a boat that needed work so that I could customise it to my needs and learn how everything works. The wooden interior was dated and gloomy, it only had 1 DC socket, no working AC (no fuse board or inverter), no hot water (water heater broken) and a rusted up stove with 1 radiator run off it. After 5 months of hardship and an ever decreasing bank balance whether that was a good idea is debatable…..

VPP on FreeBSD – Part 1

About this series

FreeBSD

Ever since I first saw VPP - the Vector Packet Processor - I have been deeply impressed with its performance and versatility. For those of us who have used Cisco IOS/XR devices, like the classic ASR (aggregation services router), VPP will look and feel quite familiar as many of the approaches are shared between the two. Over the years, folks have asked me regularly “What about BSD?” and to my surprise, late last year I read an announcement from the FreeBSD Foundation [ref] as they looked back over 2023 and forward to 2024:

Porting the Vector Packet Processor to FreeBSD

Vector Packet Processing (VPP) is an open-source, high-performance user space networking stack that provides fast packet processing suitable for software-defined networking and network function virtualization applications. VPP aims to optimize packet processing through vectorized operations and parallelism, making it well-suited for high-speed networking applications. In November of this year, the Foundation began a contract with Tom Jones, a FreeBSD developer specializing in network performance, to port VPP to FreeBSD. Under the contract, Tom will also allocate time for other tasks such as testing FreeBSD on common virtualization platforms to improve the desktop experience, improving Continue reading

Hedge 212: Shift Left? w/Chris Romeo

How many times have you heard you should “shift left” in the last few years? What does “shift left” even mean? Even if it had meaning once, does it still have any meaning today? Should we abandon the concept, or just the term? Listen in as Chris Romeo joins Tom Ammon and Russ White to talk about the origin, meaning, and modern uselessness of the term “shift left.”
 

 
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Repetition Without Repetition

I just finished spending a wonderful week at Cisco Live EMEA and getting to catch up with some of the best people in the industry. I got to chat with trainers like Orhan Ergun and David Bombal and see how they’re continuing to embrace the need for people in the networking community to gain knowledge and training. It also made me think about a concept I recently heard about that turns out to be a perfect analogy to my training philosophy even though it’s almost 70 years old.

Practice Makes Perfect

Repetition without repetition. The idea seems like a tautology at first. How can I repeat something without repeating it. I’m sure that the people in 1967 that picked up the book by Soviet neurophysiologist Nikolai Aleksandrovitsch Bernstein were just as confused. Why should you do things over and over again if not to get good at performing the task or learning the skill?

The key in this research from Bernstein lay in how the practice happens. In this particular case he looked at blacksmiths to see how they used hammers to strike the pieces they were working on. The most accurate of his test subjects didn’t just perform the Continue reading

Get to Know Mike Twumasi and Why You Should be Ready for DDI

Principal Consultant Mike Twumasi walks us through his background in tech, explains how the core concepts of DNS, DHCP, and IP address services can be combined into one platform solution that can transform network management, and previews his keynote presentation from our “Why DDI? How to Integrate DNS, DHCP, and IP Address Management in Your Network,” live webinar. This excerpt launched on Wednesday, January 31.
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