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A Year Later: Reflections on the ANZ Security Landscape

It’s been one year since I joined Cloudflare as Head of Australia and New Zealand. While it has been a great year for our ANZ operations, it is hard to stop thinking about the elephant in the room, especially as I’m writing this blog from my home in the middle of Melbourne’s lockdown.The pandemic has not only disrupted our daily lives, but has also...

Building even faster interpreters in Rust

At Cloudflare, we’re constantly working on improving the performance of our edge — and that was exactly what my internship this summer entailed. I’m excited to share some improvements we’ve made to our popular Firewall Rules product over the past few months.Firewall Rules lets customers filter the traffic hitting their site. It’s built using our engine,...

Raking the floods: my intern project using eBPF

Cloudflare has sophisticated DDoS attack mitigation systems with multiple layers to provide defense in depth. Some of these layers analyse large-scale traffic patterns to detect and mitigate attacks. Other layers are more protocol- and application-specific, in order to stop attacks that might be hard to detect from overall traffic patterns. In some...

Cloudflare’s Always Online and the Internet Archive Team Up to Fight Origin Errors

Every day, all across the Internet, something bad but entirely normal happens: thousands of origin servers go down, resulting in connection errors and frustrated users. Cloudflare’s users collectively spend over four and a half years each day waiting for unreachable origin servers to respond with error messages. But visitors don’t want to see error...

Moobot vs. Gatebot: Cloudflare Automatically Blocks Botnet DDoS Attack Topping At 654 Gbps

On July 3, Cloudflare’s global DDoS protection system, Gatebot, automatically detected and mitigated a UDP-based DDoS attack that peaked at 654 Gbps. The attack was part of a ten-day multi-vector DDoS campaign targeting a Magic Transit customer and was mitigated without any human intervention. The DDoS campaign is believed to have been generated by...

Secondary DNS - Deep Dive

How Does Secondary DNS Work?If you already understand how Secondary DNS works, please feel free to skip this section. It does not provide any Cloudflare-specific information.Secondary DNS has many use cases across the Internet; however, traditionally, it was used as a synchronized backup for when the primary DNS server was unable to respond to queries....

What Happens When The Whole World Goes Remote? Not To Worry, We Were Built For This

In March, governments all over the world issued stay-at-home orders, causing a mass migration to teleworking. Alongside many of our partners, Cloudflare launched free products and services supported by onboarding sessions to help our clients secure and accelerate their remote work environments. Over the past few months, a dedicated team of specialists...

Add Watermarks to your Cloudflare Stream Video Uploads

Since the launch of Cloudflare Stream, our customers have been asking for a programmatic way to add watermarks to their videos. We built the Watermarks API to support a wide range of use cases: from customers who simply want to tell Stream “can you put this watermark image to the top right of my video?” to customers with more detailed asks such as “can...

Migrating cdnjs to serverless with Workers KV

Cloudflare powers cdnjs, an open-source project that accelerates websites by delivering popular JavaScript libraries and resources via Cloudflare’s network. Since our major update in December, we focused on remodelling cdnjs for scalability and resilience. Today, we are excited to announce how Cloudflare delivers cdnjs—a migration to a serverless infrastructure...

Unimog - Cloudflare’s edge load balancer

As the scale of Cloudflare’s edge network has grown, we sometimes reach the limits of parts of our architecture. About two years ago we realized that our existing solution for spreading load within our data centers could no longer meet our needs. We embarked on a project to deploy a Layer 4 Load Balancer, internally called Unimog, to improve the reliability...

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