December 17, 2015 6:05 PM
At CloudFlare, we spend a lot of time talking about the PoPs (Points of Presence) we have around the globe, however, on December 14th, another kind of POP came to the world: a vulnerability being exploited in the wild against Joomla’s Content Management System....
December 17, 2015 2:15 PM
In a previous post we described our work on a new netmap mode called single-rx-queue. After submitting the pull request, the netmap maintainers told us that the patch was interesting, but they would prefer something more configurable instead of a tailored custom mode....
December 04, 2015 12:56 PM
With CloudFlare's release of HTTP/2 for all our customers the web suddenly has a lot of HTTP/2 connections. To get the most out of HTTP/2 you'll want to be using an up to date web browser (all the major browsers support HTTP/2)....
November 19, 2015 3:05 PM
A customer reported an unusual problem with our CloudFlare CDN: our servers were responding to some HTTP requests slowly. Extremely slowly. 30 seconds slowly....
October 29, 2015 9:26 PM
Hi, I'm Filippo and today I managed to surprise myself! (And not in a good way.) I'm developing a new module ("filter" as we call them) for RRDNS, CloudFlare's Go DNS server. ...
October 08, 2015 10:10 AM
It is no secret that at CloudFlare we put a great effort into accelerating our customers' websites. One way to do it is to reduce the size of the images on the website. This is what our Polish product is for. ...
August 04, 2015 10:36 AM
Last week ISC published a patch for a critical remotely exploitable vulnerability in the BIND9 DNS server capable of causing a crash with a single packet. ...
August 03, 2015 11:26 AM
CloudFlare’s DNS server, RRDNS, is entirely written in Go and typically runs tens of thousands goroutines. Since goroutines are cheap and Go I/O is blocking we run one goroutine per file descriptor we listen on and queue new packets for processing....
July 01, 2015 1:26 PM
CloudFlare's DNS server, RRDNS, is written in Go and the DNS team used to generate a file called version.go in our Makefile. version.go looked something like this....
June 30, 2015 11:38 AM
In a recent blog post we explained how to tweak a simple UDP application to maximize throughput. This time we are going to optimize our UDP application for latency. Fighting with latency is a great excuse to discuss modern features of multiqueue NICs. ...
June 18, 2015 11:14 AM
Something that often, uh... bugs Go developers is the lack of a proper debugger. Builds are ridiculously fast and easy, but sometimes it would be nice to just set a breakpoint and step through that endless if chain or print a bunch of values without recompiling ten times....
May 07, 2015 10:06 AM
It is no secret that we at CloudFlare love Go. We use it, and we use it a LOT. There are many things to love about Go, but what I personally find appealing is the ability to write assembly code!...
April 12, 2015 8:23 PM
If you're old enough (or interested enough) to have spent a lot of time messing around with the ASCII table then you might have run into a strange fact: it's possible to uppercase ASCII text using just bitwise AND....
March 25, 2015 4:23 PM
Here's a small Go gotcha that it's easy to fall into when using goroutines and closures. Here's a simple program that prints out the numbers 0 to 9....
January 29, 2015 1:03 PM
Today is a big day for CloudFlare! We are publishing our first two DNSSEC signed zones for the community to analyze and give feedback on....
November 05, 2014 2:25 PM
DNSSEC is an extension to DNS: it provides a system of trust for DNS records. In this post we examine some of the complications of DNSSEC, and what CloudFlare plans to do to reduce any negative impact they might have. ...
August 27, 2014 3:56 PM
Go's "object-orientation" approach is through interfaces. Interfaces provide a way of specifying the behavior expected of an object, but rather than saying what an object itself can do, they specify what's expected of an object....
August 19, 2014 7:00 AM
The Raspberry Pi was created with a simple mission in mind: change the way people interact with computers. This inexpensive, credit card-sized machine is encouraging people, especially kids, to start playing with computers, not on them....
August 19, 2014 4:32 AM
Are you familiar with the Go programming language and looking for a job in San Francisco or London? Then think about applying to CloudFlare. We're looking for people with experience writing Go in both locations....
