Workers Sites: Extending the Workers platform with our own serverless building blocks
September 27, 2019 1:01 PM
As of today, with the Wrangler CLI, you can now deploy entire websites directly to Cloudflare Workers and Workers KV. ...
The Technical Challenges of Building Cloudflare WARP
September 25, 2019 1:00 PM
If you have seen [our other post] you know that we released WARP to the last members of our waiting list today. With WARP our goal was to secure and improve the connection between your mobile devices and the Internet. ...
Inside the Web Browser’s Performance API
September 24, 2019 1:01 PM
Building a beautiful, feature-rich website is easier than ever before. Not long ago, you’d have to fire up a text editor and hand-craft a lot of HTML, CSS, and JavaScript. Today, you can use WYSIWYG tools and third-party libraries that make development much simpler....
Details of the Cloudflare outage on July 2, 2019
July 12, 2019 3:45 PM
Almost nine years ago, Cloudflare was a tiny company and I was a customer not an employee. Cloudflare had launched a month earlier and one day alerting told me that my little site, jgc.org, didn’t seem to have working DNS any more. ...
A gentle introduction to Linux Kernel fuzzing
July 10, 2019 1:07 PM
For some time I’ve wanted to play with coverage-guided fuzzing. I decided to have a go at the Linux Kernel netlink machinery. It's a good target: it's an obscure part of kernel, and it's relatively easy to automatically craft valid messages....
MORE POSTS
June 26, 2019 10:22 PM
The deep-dive into how Verizon and a BGP Optimizer Knocked Large Parts of the Internet Offline Monday
On Monday we wrote about a painful Internet wide route leak. We wrote that this should never have happened because Verizon should never have forwarded those routes to the rest of the Internet. Today we will dive into the archived routing data and analyze it....
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June 20, 2019 1:02 PM
The Quantum Menace
The impact of quantum computing on cryptography conducts research and development towards a Post-Quantum era....
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June 20, 2019 1:01 PM
Towards Post-Quantum Cryptography in TLS
In anticipation of wide-spread quantum computing, the transition from classical public-key cryptography primitives to post-quantum (PQ) alternatives has started....
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April 17, 2018 10:11 PM
mmproxy - Creative Linux routing to preserve client IP addresses in L7 proxies
In previous blog post we discussed how we use the TPROXY iptables module to power Cloudflare Spectrum. With TPROXY we solved a major technical issue on the server side, and we thought we might find another use for it on the client side of our product....
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February 20, 2018 7:49 PM
Using Go as a scripting language in Linux
At Cloudflare we like Go. We use it in many in-house software projects as well as parts of bigger pipeline systems. But can we take Go to the next level and use it as a scripting language for our favourite operating system, Linux?...
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October 23, 2015 2:24 PM
Results of experimenting with Brotli for dynamic web content
Compression is one of the most important tools CloudFlare has to accelerate website performance. Compressed content takes less time to transfer, and consequently reduces load times....
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October 09, 2015 10:26 AM
Single RX queue kernel bypass in Netmap for high packet rate networking
In a previous post we discussed the performance limitations of the Linux kernel network stack. We detailed the available kernel bypass techniques allowing user space programs to receive packets with high throughput. ...
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June 16, 2015 1:47 PM
How to receive a million packets per second
Last week during a casual conversation I overheard a colleague saying: "The Linux network stack is slow! You can't expect it to do more than 50 thousand packets per second per core!"...
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July 11, 2014 1:00 PM
Courage to change things
This was an internal email that I sent to the CloudFlare team about how we are not afraid to throw away old code. We thought it was worth sharing with a wider audience....
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February 13, 2014 1:00 AM
Technical Details Behind a 400Gbps NTP Amplification DDoS Attack
On Monday we mitigated a large DDoS that targeted one of our customers. The attack peaked just shy of 400Gbps. We've seen a handful of other attacks at this scale, but this is the largest attack we've seen that uses NTP amplification....
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January 21, 2014 4:00 PM
Protect Your Sites With Rapidly Deployed WAF Rules
An attack on your site could be catastrophic. Even a small attack can have major implications. Responding quickly to an attack is imperative. ...
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December 22, 2013 5:00 PM
Keeping our open source promise
Back in October I wrote a blog post about CloudFlare and open source software titled CloudFlare And Open Source Software: A Two-Way Street which detailed the many ways in which we use and support open source software....
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December 06, 2012 9:19 AM
Efficiently compressing dynamically generated web content
With the widespread adoption of high bandwidth Internet connections in the home, offices and on mobile devices, limitations in available bandwidth to download web pages have largely been eliminated....
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November 06, 2012 9:09 AM
Why Google Went Offline Today and a Bit about How the Internet Works
Today, Google's services experienced a limited outage for about 27 minutes over some portions of the Internet. The reason this happened dives into the deep, dark corners of networking. ...
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