January 03, 2025 2:00 PM
Multi-Path TCP: revolutionizing connectivity, one path at a timeMulti-Path TCP (MPTCP) leverages multiple network interfaces, like Wi-Fi and cellular, to provide seamless mobility for more reliable connectivity. While promising, MPTCP is still in its early stages,...
October 25, 2024 1:00 PM
Elephants in tunnels: how Hyperdrive connects to databases inside your VPC networksHyperdrive (Cloudflareâs globally distributed SQL connection pooler and cache) recently added support for directing database traffic from Workers across Cloudflare Tunnels....
October 23, 2024 1:00 PM
Training a million models per day to save customers of all sizes from DDoS attacksIn this post we will describe how we use anomaly detection to watch for novel DDoS attacks. Weâll provide an overview of how we build models which flag unusual traffic and keep our customers safe....
October 22, 2024 1:00 PM
Building Vectorize, a distributed vector database, on Cloudflareâs Developer PlatformCloudflare's Vectorize is now generally available, offering faster responses, lower pricing, a free tier, and supporting up to 5 million vectors....
April 12, 2024 1:00 PM
How we ensure Cloudflare customers aren't affected by Let's Encrypt's certificate chain changeLetâs Encryptâs cross-signed chain will be expiring in September. This will affect legacy devices with outdated trust stores (Android versions 7.1.1 or older). To prevent this change from impacting customers, Cloudflare will shift Letâs Encrypt certificates upon renewal to use a ...
March 06, 2024 2:00 PM
Linux kernel security tunables everyone should consider adoptingThis post illustrates some of the Linux Kernel features, which are helping us to keep our production systems more secure. We will deep dive into how they work and why you may consider enabling them as well...
February 08, 2024 2:00 PM
connect() - why are you so slow?This is our story of what we learned about the connect() implementation for TCP in Linux. Both its strong and weak points. How connect() latency changes under pressure, and how to open connection so that the syscall latency is deterministic and time-bound...
December 06, 2023 2:00 PM
How we used OpenBMC to support AI inference on GPUs around the worldThis is what Cloudflare has been able to do so far with OpenBMC with respect to our GPU-equipped servers...
November 17, 2023 2:00 PM
How to execute an object file: part 4, AArch64 editionThe initial posts are dedicated to the x86 architecture. Since then, the fleet of our working machines has expanded to include a large and growing number of ARM CPUs. This time weâll repeat this exercise for the aarch64 architecture....
October 06, 2023 1:05 PM
Virtual networking 101: bridging the gap to understanding TAPTap devices were historically used for VPN clients. Using them for virtual machines is essentially reversing their original purpose - from traffic sinks to traffic sources. In the article I explore the intricacies of tap devices, covering topics like offloads, segmentation, and m...
June 26, 2023 1:00 PM
Lost in transit: debugging dropped packets from negative header lengthsIn this post, we'll provide some insight into the process of investigating networking issues and how to begin debugging issues in the kernel using pwru and kprobe tracepoints...
June 19, 2023 1:00 PM
Every request, every microsecond: scalable machine learning at CloudflareWe'll describe the technical strategies that have enabled us to expand the number of machine learning features and models, all while substantially reducing the processing time for each HTTP request on our network...
May 26, 2023 1:00 PM
How Oxy uses hooks for maximum extensibilityLet's take a look from the perspective of an Oxy application developer, and then we can discuss the implementation of the framework and some of the interesting design decisions we made...
May 25, 2023 3:31 PM
Unbounded memory usage by TCP for receive buffers, and how we fixed itWe are constantly monitoring and optimizing the performance and resource utilization of our systems. Recently, we noticed that some of our TCP sessions were allocating more memory than expected. This blog post describes in detail the root cause of the problem and shows the test r...
May 18, 2023 1:00 PM
Building Cloudflare on CloudflareCloudflare was originally built as native services, but weâre building more and more of it on Cloudflare itself. This post describes how and why weâre doing this....
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