How to execute an object file: Part 1
Calling a simple function without linking When we write software using a high-level compiled programming language, there are usually a number of steps involved in Read More
Category: Deep Dive
A quirk in the SUNBURST DGA algorithm
On Wednesday, December 16, the RedDrip Team from QiAnXin Technology released their discoveries (tweet, github) regarding the random subdomains associated with the SUNBURST malware which Read More
ASICs at the Edge
At Cloudflare we pride ourselves in our global network that spans more than 200 cities in over 100 countries. To handle all the traffic passing Read More
Diving into /proc/pid/mem
A few months ago, after reading about Cloudflare doubling its intern class size, I quickly dusted off my CV and applied for an internship. Long Read More
What is Cloudflare One?
Running a secure enterprise network is really difficult. Employees spread all over the world work from home. Applications are run from data centers, hosted in Read More
Unimog – Cloudflare’s edge load balancer
As the scale of Cloudflare’s edge network has grown, we sometimes reach the limits of parts of our architecture. About two years ago we realized Read More
Why is there a "V" in SIGSEGV Segmentation Fault?
Another long night. I was working on my perfect, bug-free program in C, when the predictable thing happened: $ clang skynet.c -o skynet $ ./skynet.out Read More
Cloudflare Bot Management: machine learning and more
Introduction Building Cloudflare Bot Management platform is an exhilarating experience. It blends Distributed Systems, Web Development, Machine Learning, Security and Research (and every discipline in Read More
The History of the URL
On the 11th of January 1982 twenty-two computer scientists met to discuss an issue with ‘computer mail’ (now known as email). Attendees included the guy Read More
When Bloom filters don't bloom
I’ve known about Bloom filters (named after Burton Bloom) since university, but I haven’t had an opportunity to use them in anger. Last month this Read More