Today on the Tech Bytes podcast we explore the branch of the future with sponsor Palo Alto Networks. We talk about how SD-WAN and SASE come together with Digital Experience Management (DEM) to meet the challenges of security, cloud, and hybrid work at the branch.
The post Tech Bytes: Building The Branch Of The Future With Palo Alto Networks SD-WAN And SASE (Sponsored) appeared first on Packet Pushers.
If you follow Cloudflare, you know that Birthday Week is a big deal. We’ve taken a similar approach to Project Galileo since its founding in 2014. For the anniversary, we typically give an overview of what we have learned to protect the most vulnerable in the last year and announce new product features, partnerships, and how we’ve been able to expand the project.
When our Cloudflare Impact team was preparing for the anniversary, we noticed a theme. Many of the projects we worked on throughout the year involved Project Galileo. From access to new products, development of privacy-enhancing technologies, collaborations with civil society and governments, we saw that the project played a role in either facilitating conversation with the right people or bridging gaps.
After reflecting on the last year, we’ve seen a project that was initially intended to keep journalism and media sites online grew into more. So, for this year, in addition to new announcements, we want to take the time to reflect on how we have seen Project Galileo transform and how we look toward the future in protecting the most vulnerable on the Internet.
The original goal of Project Galileo was simple. Although Continue reading
One of the most common causes of Internet routing leaks is an undereducated end-customer configuring EBGP sessions with two (or more) upstream ISPs.
Without basic-level BGP knowledge or further guidance from the service providers, the customer network engineer1 might start a BGP routing process and configure two EBGP sessions, similar to the following industry-standard CLI2 configuration:
One of the most common causes of Internet routing leaks is an undereducated end-customer configuring EBGP sessions with two (or more) upstream ISPs.
Without basic-level BGP knowledge or further guidance from the service providers, the customer network engineer1 might start a BGP routing process and configure two EBGP sessions, similar to the following industry-standard CLI2 configuration:
Brandon Hitzel published a detailed document describing various Internet WAN edge designs. Definitely worth reading and bookmarking.
Brandon Hitzel published a detailed document describing various Internet WAN edge designs. Definitely worth reading and bookmarking.
Another phenomenal detective story published on Cloudflare blog: Unbounded memory usage by TCP for receive buffers, and how we fixed it.
TL&DR: Moving TCP window every time you acknowledge a segment doesn’t work well with scaled window sizes.
The interesting takeaways:
Another phenomenal detective story published on Cloudflare blog: Unbounded memory usage by TCP for receive buffers, and how we fixed it.
TL&DR: Moving TCP window every time you acknowledge a segment doesn’t work well with scaled window sizes.
The interesting takeaways:
In our rapidly advancing world, communication speeds are increasing at a fast pace. Transceiver speeds have evolved from 100G to 400G, 800G, and soon even 1.6T. Similarly, Optical systems are evolving to keep up with the pace. If we dig deeper, we will discover that many concepts are shared across various domains, such as Wi-Fi, optical communications, transceivers, etc. Still, without the necessary background, It’s not easy to identify the patterns. If we have the essential knowledge, it becomes easier to understand the developments happening in the respective areas, and we can better understand the trade-offs made by the designers while designing a particular system. And that’s the motivation behind writing this post is to cover fundamental concepts which form the basis for our modern communication system and how they all relate to each other.
So let’s start with the most fundamental thing, i.e., wave. A wave is a disturbance that carries energy from one location to another without displacing matter. Waves transfer energy from their source and do not cause any permanent displacement of matter in the medium they pass through. The following animation demonstrates this concept.
Ocean and sound waves are mechanical waves Continue reading
If you’ve shied away from network automation because you’re a network engineer not a coder, fear not. There are network automation approaches that can help you get needful work done and don’t require a computer science degree. On today's Heavy Networking we talk with sponsor BackBox about its practical approach to network automation and dive into use cases including network OS backups and compliance.
The post Heavy Networking 682: Automating Upgrades And Ensuring Compliance With BackBox (Sponsored) appeared first on Packet Pushers.
It’s been almost five years since I wrote about the challenges of project management and timing your work as an engineer. While most of that information is still very true even today I’ve recently had my own challenges with my son’s Eagle Scout project. He is of a mind that you can throw together a plan and just do a whole week of work in just a couple of days. I, having worked in the IT industry for years, have assured him that it absolutely doesn’t work like that. Why is there a disconnect between us? And how does that disconnect look to the rest of the world?
The first problem that I often see when working with people that aren’t familiar with projects is that they vastly underestimate the amount of time it takes to get something done. You may recall from my last post that my project managers at my old VAR job had built in something they called Tom Time to every quote. That provided a way for my estimate to reflect reality once I arrived on site and found the things didn’t go according to plan.
Part of the reason why my estimates Continue reading