Weekend Reads 040124


Exclusive Dell’s “return to office” mandate has left employees confused about which offices they can use and the future of their jobs – and concerned the initiative is a stealth layoff program that will disproportionately harm women at the IT giant.


FDC Pat Gelsinger wants to make Intel the world’s second largest chip manufacturer by 2030, and that means serving businesses the x86 giant has traditionally seen as competitors.


Intel revealed a new road map at its Intel Foundry Services (IFS) Direct event that will take the company into 2027. Itﾒs an extension of the road map Intel laid out nearly three years ago, shortly after Intelﾒs CEO Pat Gelsinger took the reins of the company.


It is not known who pilfered the information nor their motives, but this leak provides a first-of-its-kind look at the internal operations of a state-affiliated hacking contractor.


Apple has announced a new post-quantum cryptographic protocol called PQ3 that it said will be integrated into iMessage to secure the messaging platform against future attacks arising from the threat of a practical quantum computer.


Juniper Networks, currently in the process of being acquired by HPE, has been accused of violating US securities laws in a shareholder Continue reading

Hedge 215: Old Engineering Quotes

Reading people from the past can sometimes show us where today’s blind spots are–but sometimes we can just find the blind spots of the people who lived then. In this episode of the Hedge, Tom, Eyvonne, and Russ finish going through a selection of quotes from an engineering book published in 1911. This time, we find there are some things to agree with, but also some to disagree with.

EVPN – Asymmetric vs Symmetric IRB

It is well known that VXLAN supports bridging frames, that is, forwarding frames that belong to the same L2 segment. In the beginning, this is all that was supported. There was no VXLAN routing. In essence, the HW didn’t support taking a VXLAN encapsulated packet, decapsulating it, and then performing a L3 lookup. This meant that another device was needed to do the L3 lookup. Think of it as router on a stick where the VTEP would decapsulate the packet and forward it (based on L2 lookup) to a gateway. This gateway needed to have L3 interfaces for all the L2 VNIs that needed routing. Now, this is still applicable in a design where a FW should inspect traffic between all VNIs, but HW has supported for a long time to do VXLAN routing, that is, taking packet from one VNI and routing it to another VNI. This is referred to as Integrated Routing and Bridging (IRB), as the device is capable of both bridging and routing packets. IRB is described in RFC 9135.

There are two types of IRB, asymmetric and symmetric. Asymmetric vs symmetric refers to how the lookup is performed to do routing. Let’s first take a Continue reading

Lateral Security for the Private Cloud – Leveraging the Power of Seamless Integration

Because modern threats are distributed and multi-varied, protecting against them cannot be accomplished through a series of point security solutions.

Recently, there are discussions happening in the industry around the “platformization of security”. These are not new thoughts but are all essentially derived from how to offer a simpler solution to a complex problem. In my previous blog “Tackling the 5Cs of enterprise security with the advent of AI” , I had highlighted the preference for “consolidation” through a platform approach.

Since the security attack surface is ever broadening, customers prefer a holistic and integrated approach to solving it, versus a variety of point solutions each with independent bells and whistles. Integration in this context means seamless interworking between the different components, deep visibility across the components and providing customers with a secure plug-n-play experience that drives operational simplicity and ease of use. Fundamentally, his is the promise of the security platform.

 

Let’s consider this in the context of the private cloud, taking the industry-leading private cloud solution from VMware as an example. Enterprises choose private clouds because it gives them greater control, compliance, and, in many cases a significantly lower operating cost structure.

Customers adopting the Continue reading

Linting your Markdown Files

It’s no secret I’m a fan of Markdown. The earliest mention of Markdown on this site is all the way back in 2011, and it was only a couple years after that when I migrated this site from WordPress to Markdown. Back then, the site was generated from Markdown using Jekyll (via GitHub Pages); today it is generated from Markdown sources using Hugo. One thing I’ve not done, though, is perform linting (checking for errors or potential errors) of the Markdown source files. That’s all about to change! In this post, I’ll share with you how I started linting my Markdown files.

To handle the linting, there are (at least) a couple different options:

  1. markdownlint-cli (GitHub repository)
  2. markdownlint-cli2 (GitHub repository)

Both of these use the same markdownlint library under the hood. They’re both available as both a CLI tool or as a Docker container; markdownlint-cli2 is also available as a GitHub Action. In both cases, the CLI tool is installed via npm install (typically globally with --global or -g). The key difference between the two is that markdownlint-cli2 is configuration-driven, whereas markdownlint-cli offers the ability to use either a configuration file or command-line flags. I Continue reading

Ansible Subelements Lookup Example

Ansible Subelements Lookup Example

When you're working with Ansible, you often come across situations where you need to deal with lists inside of lists. Imagine you have a bunch of servers, and each server has its own set of services to manage.

The subelements lookup plugin is designed to iterate over a list of dictionaries and a specified sub-list within each dictionary. Instead of writing complicated code to dig into each layer, subelements lets you glide through the outer list and then dive into the inner list easily.

What we will cover?

  • Subelements syntax
  • Subelements example
  • What are item.0 and item.1?
  • Subelements example with NetBox

Subelements Syntax

To use subelements in your playbook, you write a loop that tells Ansible what main list to look at and which sublist to go through. Here’s what a simple line of code looks like. 

loop: "{{ query('subelements', your_main_list, 'your_sublist_key') }}"

your_main_list is where you have all your main items (like servers), and your_sublist_key is the name of the sublist inside each main item (like tasks for each server). Ansible will then loop through each main item and its sub-items in turn.

Ansible Subelements Example

Suppose you have the following data structure defined in your playbook.

 Continue reading

Electrics and plumbing

Unless you plan to live by candle light and bathe in the canal you are going to need electrics and hot water. The two main players when it comes to boat electrics are Victron and Mastervolt, I went for victron as their whole eco-system seems a lot more advanced and customisable (are a lot more guides, examples and advise readily available online). In terms of hot water and heating a calorifier is the only real sensible option, for the diesel heater I chose Webasto over Eberspacher as I liked how they how they have incorporated the use of Heatmiser thermostat controllers.

polyfill.io now available on cdnjs: reduce your supply chain risk

Polyfill.io is a popular JavaScript library that nullifies differences across old browser versions. These differences often take up substantial development time.

It does this by adding support for modern functions (via polyfilling), ultimately letting developers work against a uniform environment simplifying development. The tool is historically loaded by linking to the endpoint provided under the domain polyfill.io.

In the interest of providing developers with additional options to use polyfill, today we are launching an alternative endpoint under cdnjs. You can replace links to polyfill.io “as is” with our new endpoint. You will then rely on the same service and reputation that cdnjs has built over the years for your polyfill needs.

Our interest in creating an alternative endpoint was also sparked by some concerns raised by the community, and main contributors, following the transition of the domain polyfill.io to a new provider (Funnull).

The concerns are that any website embedding a link to the original polyfill.io domain, will now be relying on Funnull to maintain and secure the underlying project to avoid the risk of a supply chain attack. Such an attack would occur if the underlying third party is compromised or Continue reading

Zaraz launches new pricing

In July, 2023, we announced that Zaraz was transitioning out of beta and becoming available to all Cloudflare users. Zaraz helps users manage and optimize the ever-growing number of third-party tools on their websites — analytics, marketing pixels, chatbots, and more — without compromising on speed, privacy, or security. Soon after the announcement went online, we received feedback from users who were concerned about the new pricing system. We discovered that in some scenarios the proposed pricing could cause high charges, which was not the intention, and so we promised to look into it. Since then, we have iterated over different pricing options, talked with customers of different sizes, and finally reached a new pricing system that we believe is affordable, predictable, and simple. The new pricing for Zaraz will take effect on April 15, 2024, and is described below.

Introducing Zaraz Events

One of the biggest changes we made was changing the metric we used for pricing Zaraz. One Zaraz Event is an event you’re sending to Zaraz, whether that’s a pageview, a zaraz.track event, or similar. You can easily see the total number of Zaraz Events you’re currently using under the Monitoring section in the Cloudflare Zaraz Continue reading

Remediating new DNSSEC resource exhaustion vulnerabilities

Cloudflare has been part of a multivendor, industry-wide effort to mitigate two critical DNSSEC vulnerabilities. These vulnerabilities exposed significant risks to critical infrastructures that provide DNS resolution services. Cloudflare provides DNS resolution for anyone to use for free with our public resolver 1.1.1.1 service. Mitigations for Cloudflare’s public resolver 1.1.1.1 service were applied before these vulnerabilities were disclosed publicly. Internal resolvers using unbound (open source software) were upgraded promptly after a new software version fixing these vulnerabilities was released.

All Cloudflare DNS infrastructure was protected from both of these vulnerabilities before they were disclosed and is safe today. These vulnerabilities do not affect our Authoritative DNS or DNS firewall products.

All major DNS software vendors have released new versions of their software. All other major DNS resolver providers have also applied appropriate mitigations. Please update your DNS resolver software immediately, if you haven’t done so already.

Background

Domain name system (DNS) security extensions, commonly known as DNSSEC, are extensions to the DNS protocol that add authentication and integrity capabilities. DNSSEC uses cryptographic keys and signatures that allow DNS responses to be validated as authentic. DNSSEC protocol specifications have certain requirements that prioritize availability at Continue reading

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