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Performance — An early look at cryptographic watermarks for AI-generated content

An early look at cryptographic watermarks for AI-generated content

It's becoming increasingly difficult to tell the difference between web content produced by humans and web content produced by AI. In this post, we're going to look at a promising new approach to making AI content distinguishable as such without impacting the performance of the model.

TBTeresa Brooks Mejia, Christopher PattonTeresa Brooks Mejia, Christopher Patton·March 19, 2025Performance
Security — Welcome to Security Week 2025!

Welcome to Security Week 2025!

The layer of security around today’s Internet is essential to safeguarding everything. Over the next week, we will discuss the latest trends in cyber security, announce new products and partnerships, and showcase the latest in Cloudflare technology. Welcome to Security Week 2025!

GGrantGrant·March 16, 2025Security
Networking — Some TXT about, and A PTR to, new DNS insights on Cloudflare Radar

Some TXT about, and A PTR to, new DNS insights on Cloudflare Radar

The new Cloudflare Radar DNS page provides increased visibility into aggregate traffic and usage trends seen by our 1.1.1.1 resolver. In addition to global, location, and ASN traffic trends, we are also providing perspectives on protocol usage, query/response characteristics, and DNSSEC usage.

DBDavid Belson, Carlos RodriguesDavid Belson, Carlos Rodrigues·February 27, 2025Networking
Systems — Searching for the cause of hung tasks in the Linux kernel

Searching for the cause of hung tasks in the Linux kernel

The Linux kernel can produce a hung task warning. Searching the Internet and the kernel docs, you can find a brief explanation that the process is stuck in the uninterruptible state. That explains the warning’s meaning, but doesn’t provide the reason it occurred. In this blog post we’re going to explore how the warning works.

OJOxana, Jesper BrouerOxana, Jesper Brouer·February 14, 2025Systems
SRE & Ops — Cloudflare incident on February 6, 2025

Cloudflare incident on February 6, 2025

On Thursday, February 6, 2025, we experienced an outage with our object storage service (R2) and products that rely on it. Here's what happened and what we're doing to fix this going forward.

SJSilverlock, JavierSilverlock, Javier·February 7, 2025SRE & Ops
Engineering — A diversity of downtime: the Q4 2024 Internet disruption summary

A diversity of downtime: the Q4 2024 Internet disruption summary

After a rather busy third quarter, the fourth quarter of 2024 saw significantly fewer Internet disruptions. This quarter, notable outages were caused by cable cuts, power outages, natural disasters, military action, maintenance, and government direction. Read on for the details.

DBDavid BelsonDavid Belson·January 28, 2025Engineering
Engineering — Cloudflare meets new Global Cross Border Privacy standards

Cloudflare meets new Global Cross Border Privacy standards

Cloudflare is the first organisation globally to announce we have been successfully audited against the brand-new international ‘Global Cross-Border Privacy Rules’ system and the brand new ‘Global Privacy Rules for Processors’. Cloudflare will be certified from day one when the certifications launch later in 2025.

RERory, Emily HancockRory, Emily Hancock·January 28, 2025Engineering
Distributed — Over 700 million events/second: How we make sense of too much data

Over 700 million events/second: How we make sense of too much data

Here we explain how we made our data pipeline scale to 700 million events per second while becoming more resilient than ever before. We share some math behind our approach and some of the designs of our systems, as well as issues that we had to face and bugs we had to chase.

CPConstantin Pan, Jim HawkridgeConstantin Pan, Jim Hawkridge·January 27, 2025Distributed
Engineering — The fall and rise of TikTok (traffic)

The fall and rise of TikTok (traffic)

On January 19, 2025, ByteDance suspended TikTok and related apps for US users. We examine the 14-hour traffic plunge, recovery near Donald Trump’s inauguration, and how alternatives like RedNote surged.

JTJoao TomeJoao Tome·January 21, 2025Engineering
Engineering — Open source all the way down: Upgrading our developer documentation

Open source all the way down: Upgrading our developer documentation

At Cloudflare, we treat developer content like an open source product. This collaborative approach enables global contributions to enhance quality and relevance for a wide range of users. This year, we scaled our documentation site to better meet the needs of users by migrating to the Astro ecosystem.

KKKim, Kian Newman HazelKim, Kian Newman Hazel·January 8, 2025Engineering
Networking — Multi-Path TCP: Revolutionizing connectivity, one path at a time

Multi-Path TCP: Revolutionizing connectivity, one path at a time

Multi-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, with limited support and practical use cases. This post explores its potential and current limitations.

MMMarek MajkowskiMarek Majkowski·January 3, 2025Networking
Engineering — The forecast is clear: clouds on e-paper, powered by the cloud

The forecast is clear: clouds on e-paper, powered by the cloud

Follow along as I build a custom weather display using Cloudflare Workers and a popular e-paper display. While the embedded electronics I used have their limitations, Workers provided an elegant solution to overcome these challenges and bring the project to life.

MMMarek MajkowskiMarek Majkowski·December 31, 2024Engineering
Engineering — Cloudflare 2024 Year in Review

Cloudflare 2024 Year in Review

The 2024 Cloudflare Radar Year in Review is our fifth annual review of Internet trends and patterns at both a global and country/region level. For 2024, we added several new metrics, as well as the ability to do year-over-year and geographic comparisons for selected metrics.

DBDavid BelsonDavid Belson·December 9, 2024Engineering
SRE & Ops — Cloudflare incident on November 14, 2024, resulting in lost logs

Cloudflare incident on November 14, 2024, resulting in lost logs

On November 14, 2024, Cloudflare experienced a Cloudflare Logs outage, impacting the majority of customers using these products. During the ~3.5 hours that these services were impacted, about 55% of the logs we normally send to customers were not sent and were lost. The details of what went wrong and why are interesting both for customers and practitioners.

JTJamie, Tom WalwynJamie, Tom Walwyn·November 26, 2024SRE & Ops
Security — Bigger and badder: how DDoS attack sizes have evolved over the last decade

Bigger and badder: how DDoS attack sizes have evolved over the last decade

If we plot the metrics associated with large DDoS attacks observed in the last 10 years, does it show a straight, steady increase in an exponential curve that keeps becoming steeper, or is it closer to a linear growth? Our analysis found the growth is not linear but rather is exponential, with the slope varying depending on the metric (rps, pps or bps).

JSJose SalvadorJose Salvador·November 20, 2024Security