In an era when email remains one of the most important forms of communication for business, commerce, and personal use, ensuring that emails reach their intended recipients (and don’t end up in spam, or worse, aiding cybercrime) is more important than ever. One of the often “behind‐the‐scenes” organizations helping to defend email systems is Spamhaus. […]
Archive | Security
RSS feed for this sectionYou don’t need quantum hardware for post-quantum security
Organizations have finite resources available to combat threats, both by the adversaries of today and those in the not-so-distant future that are armed with quantum computers. In this post, we provide guidance on what to prioritize to best prepare for the future, when quantum computers become powerful enough to break the conventional cryptography that underpins […]
Connect and secure any private or public app by hostname, not IP — free for everyone in Cloudflare One
Connecting to an application should be as simple as knowing its name. Yet, many security models still force us to rely on brittle, ever-changing IP addresses. And we heard from many of you that managing those ever-changing IP lists was a constant struggle. Today, we’re taking a major step toward making that a relic of […]
The RUM Diaries: enabling Web Analytics by default
Measuring and improving performance on the Internet can be a daunting task because it spans multiple layers: from the user’s device and browser, to DNS lookups and the network routes, to edge configurations and origin server location. Each layer introduces its own variability such as last-mile bandwidth constraints, third-party scripts, or limited CPU resources, that […]
Integrating CrowdStrike Falcon Fusion SOAR with Cloudflare’s SASE platform
The challenge of manual response Security teams know all too well the grind of manual investigations and remediation. With the mass adoption of AI and increasingly automated attacks, defenders cannot afford to rely on overly manual, low priority, and complex workflows. Heavily burdensome manual response introduces delays as analysts bounce between consoles and high alert […]
Choosing the Best CMS for Your Needs
Knowing which is the right CMS is key when launching a new site. Websites are no longer just online brochures; they’re where businesses sell products, protect private information, chat with customers, and build their entire online brand. A good CMS gives you flexibility, room to grow, and strong security, so you can easily manage your […]
Bringing Node.js HTTP servers to Cloudflare Workers
We’re making it easier to run your Node.js applications on Cloudflare Workers by adding support for the node:http client and server APIs. This significant addition brings familiar Node.js HTTP interfaces to the edge, enabling you to deploy existing Express.js, Koa, and other Node.js applications globally with zero cold starts, automatic scaling, and significantly lower latency […]
Addressing the unauthorized issuance of multiple TLS certificates for 1.1.1.1
Over the past few days Cloudflare has been notified through our vulnerability disclosure program and the certificate transparency mailing list that unauthorized certificates were issued by Fina CA for 1.1.1.1, one of the IP addresses used by our public DNS resolver service. From February 2024 to August 2025, Fina CA issued twelve certificates for 1.1.1.1 […]
AI Week 2025: Recap
How do we embrace the power of AI without losing control? That was one of our big themes for AI Week 2025, which has now come to a close. We announced products, partnerships, and features to help companies successfully navigate this new era. Everything we built was based on feedback from customers like you that […]
The impact of the Salesloft Drift breach on Cloudflare and our customers
Last week, Cloudflare was notified that we (and our customers) are affected by the Salesloft Drift breach. Because of this breach, someone outside Cloudflare got access to our Salesforce instance, which we use for customer support and internal customer case management, and some of the data it contains. Most of this information is customer contact […]
