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Category Archives for "Networking"

Hey Alexa, Turn my lab on!

TL/DR Put together a custom Alexa Skill so I can turn switches and routers off in my lab as shown in the video here. Feels pretty great.

 

As most of my twitter followers have noticed, I’ve been doing a lot of Home Automation, mostly with Apple #homeKit. But I also picked up an Amazon Dot because… well why not?

One of the great things abut the digital voice assistance from Amazon, is that they have created an extensible framework that enables those with a little bit of coding skills to add to Mrs. A’s already already impressive impressive array of abilities.

The Amazon Alexa developer page is pretty impressive. There’s a ton of information and tutorials there, as well as an SDK and code examples in Node.js. I’m almost exclusively a python coder at this point, so I decided to look for something a little more familiar and came upon this.

Flask-Ask

Flask-Ask is a Flask extension that makes building Alexa skills for the Amazon Echo easier and much more fun.

Essentially, John Wheeler took the flask WSGI ( web) framework and made it super easy to be able to create Amazon Alexa skills using this familiar library. Continue reading

Worth Reading: It’s okay to forget what you read

Many of us feel this near-existential fear that we might “lose” what wisdom we extract from the books we read.Such fears are unfounded. First of all, if you love books, memory is never a problem. If I read for pure pleasure, what harm is there is forgetting? I get to enjoy the same wonderful book over and over again — for the book-lover, what better gift is there than forgetfulness? But many of us read books for reasons other than pleasure. We want to get something from the books we read. There is much written on retaining what you read (note it, connect it, summarize it, teach it, yawn…), but Paul Graham, I think, has something new and interesting to say. —Charles Chu on Medium

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Upcoming Events and Webinars

You might have noticed the “upcoming webinars” blog widget is gone and I’ll write a blog post every two weeks or so to keep you updated on upcoming webinars and other events.

Here’s what’s coming in September and October 2017:

Istanbul/Turkey Onsite CCDE Training – 50% OFF until Sep-15, 2017

Istanbul/Turkey Onsite CCDE Training will be held between October 30 – November 4.   Course will be in English as usual, everyday will be between 9am – 6pm, 9 hours.   I am going to extend my CCDE Materials for this course as there was new scenarios and the technologies after August 29, 2017 CCDE […]

The post Istanbul/Turkey Onsite CCDE Training – 50% OFF until Sep-15, 2017 appeared first on Cisco Network Design and Architecture | CCDE Bootcamp | orhanergun.net.

Docker Networking Tip – Load balancing options in Docker

I had promised earlier that I will continue my Docker Networking Tip series. This is second in that series. The first one on Macvlan driver can be found here. In this presentation, I have covered different load balance options with Docker. Following topics are covered in this presentation: Overview of Service Discovery and Load balancing … Continue reading Docker Networking Tip – Load balancing options in Docker →

Change VM Hardware Version

The VM hardware version designates the virtual hardware functions supported by a virtual machine, which relates to the hardware on the host server. A VMware product will not be able to power on a VM with a hardware version higher than what it supports.

SIDH in Go for quantum-resistant TLS 1.3

The Quantum Threat

SIDH in Go for quantum-resistant TLS 1.3

Most of today's cryptography is designed to be secure against an adversary with enormous amounts of computational power. This means estimating how much work certain computations (such as factoring a number, or finding a discrete logarithm) require, and choosing cryptographic parameters based on our best estimate of how much work would be required to break the system.

If it were possible to build a large-scale quantum computer, many of the problems whose difficulty we rely on for security would no longer be difficult to solve. While it remains unknown whether large-scale quantum computers are possible (see this article for a good overview), it's a sufficient risk that there's wide interest in developing quantum-resistant (or post-quantum) cryptography: cryptography that works on ordinary computers we have today, but which is secure against a possible quantum computer.

At Cloudflare, our biggest use of cryptography is TLS, which we use both for serving our customers' websites (all Cloudflare sites get free HTTPS), as well as for internal inter-datacenter communication on our backend.

In the TLS context, we want to create a secure connection between a client and a server. There are basically three cryptographic problems here:

  1. Authenticity: the server Continue reading

New Study: Understanding MANRS’ Potential for Enterprises and Service Providers

Mutually Agreed Norms for Routing Security, or MANRS, was founded with the ambitious goal of improving the security and reliability of the global Internet routing system, based on collaboration among participants and shared responsibility for Internet infrastructure. These are undoubtedly essential pillars supporting the Internet’s tremendous growth and success, but we must better articulate the incentives of contributing to global security and resilience to grow MANRS participation and reach our goals.

To do so, we engaged 451 Research to understand the attitudes and perceptions of Internet service providers and the broader enterprise community around MANRS and how it relates to their organizations. The results of the study are documented in the report: https://www.routingmanifesto.org/resources/research/.

The study results demonstrate considerable unrealized potential for MANRS, showing that enterprises are interested in security and their interest should be a strong incentive for more service providers to participate. Market education could be particularly effective in overcoming the operational inertia that many providers face.

The key points from the study are:

  • While MANRS itself is not well known by enterprises, its attributes are highly valued.
  • Enterprises have high expectations for MANRS efforts.
  • Enterprise perceptions of MANRS can translate into increased revenue for service Continue reading

Time Synchronization, Security, and Trust

Time is something that is often overlooked or taken for granted, but the accuracy and reliability of time is critical to our lives and must be protected. Time is a core concept underlying nearly all physical and virtual systems. Distributed computer systems, key to many functions inherent in our daily lives, rely on accurate and reliable time, yet we rarely stop and think about how that time is constructed and represented. Accurate and reliable time is needed to determine when an event occurs, in what order a particular sequence of events occurs, or when to schedule an event that is to occur at a particular time in the future. Finally, and of particular interest to our trust agenda here at the Internet Society, quality reliable time is required for many of the security technologies that help provide trust for the Internet. It is a vital and often overlooked part of the Internet infrastructure.

Some specific examples where accurate reliable secure time information is vital include:

  • The finance sector where there are high demands on the time synchronization of business clocks in trading systems. This is especially true in the high frequency trading where a new EU legislation called Markets Continue reading

Worth Reading: Wave System’s DPU architecture

Their view is that dataflow architectures are the only way to efficiently train networks with high performance. The CPU is carved out of their systems entirely and as we explained when first details were clear about what they were working on in depth last year, the Hybrid Memory Cube does a great deal of the heavy lifting in terms of both compute and data flow. We now have far more detail than we’ve seen to date about how it works—and where it might carve out market share in the future. —Nicole Hemsoth @The Next Platform

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Portland (Oregon): Cloudflare’s 117th Data Center!

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Even as the luckiest amongst us across the US West Coast dashed off to Oregon to be closer to the solar eclipse path of totality, Cloudflare engineers were busy turning up our newest data center in Portland.

This deployment serves as our 27th data center in North America alone, and our 117th globally. It also provides additional redundancy to our Seattle and San Jose data centers, while increasing our capacity to run services and fight growing attacks.

Special History

The Silicon Forest corridor around Portland holds a special place in the hearts of the Cloudflare team. It is both new (by way of our latest edge deployment bringing us closer to millions of Oregon Internet users), and familiar (since we have had an internal data center in this region for many years, enabling services such as analytics and enterprise logs).

The greater Portland area has played a pivotal area in building high-technology products from companies such as Tektronix (test and measurement equipment), Mentor Graphics (electronic design automation) and Intel (with nearly 20,000 employees across Oregon).

Expanding the edge

At our Portland data center, we locally interconnect with ISPs such as Comcast (into their regional area networks such as Beaverton and Continue reading

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