March 02, 2020 1:00 PM
Last month finally I had an opportunity to use Bloom filters. I became fascinated with the promise of this data structure, but I quickly realized it had some drawbacks. This blog post is the tale of my brief love affair with Bloom filters....
December 05, 2019 7:28 AM
An exploration of building accessible color systems for flexible UI theming. ...
November 29, 2019 8:00 AM
The second blog post in the series on HTML rewriters picks up the story in 2017 after the launch of the Cloudflare edge compute platform Cloudflare Workers. It became clear that the developers using workers wanted the same HTML rewriting capabilities that we used internally, ...
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. ...
September 25, 2019 1:00 PM
With WARP our goal was to secure and improve the connection between your mobile devices and the Internet. ...
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. ...
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....
July 02, 2019 3:50 PM
Starting at 1342 UTC today we experienced a global outage across our network that resulted in visitors to Cloudflare-proxied domains being shown 502 errors (“Bad Gateway”). The cause of this outage was deployment of a single misconfigured rule within the Cloudflare Web Applicatio...
June 26, 2019 10:22 PM
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....
June 20, 2019 1:02 PM
The impact of quantum computing on cryptography conducts research and development towards a Post-Quantum era....
June 20, 2019 1:01 PM
In anticipation of wide-spread quantum computing, the transition from classical public-key cryptography primitives to post-quantum (PQ) alternatives has started....
April 17, 2018 10:11 PM
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....
February 20, 2018 7:49 PM
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?...
October 23, 2015 2:24 PM
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....
October 09, 2015 10:26 AM
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. ...
June 16, 2015 1:47 PM
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!"...
July 11, 2014 1:00 PM
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....
February 13, 2014 1:00 AM
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....
January 21, 2014 4:00 PM
An attack on your site could be catastrophic. Even a small attack can have major implications. Responding quickly to an attack is imperative. ...
