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....
July 03, 2014 3:00 PM
In a recent article I described the basic concepts behind the use of Berkeley Packet Filter (aka BSD Packet filter or BPF) bytecode for high performance packet filtering, and the xt_bpf iptables module....
July 02, 2014 12:14 AM
In the past we've written about how CloudFlare isn't afraid to rip out and replace chunks of code that have proved to be hard to maintain or have simply reach end of life. ...
June 13, 2014 5:40 AM
On the 10th of June, the UK domain registry Nominet made available second-level domain namespace to the public, allowing anyone to register a domain ending with simply .uk...
June 12, 2014 1:30 PM
Earlier today, CloudFlare announced Project Galileo to protect free speech on the Web by using its sophisticated anti-DDoS resources. ...
April 17, 2014 10:00 AM
A quick followup to our last blog post on our decision to reissue and revoke all of CloudFlare's customers' SSL certificates. One question we've received is why we didn't just reissue and revoke all SSL certificates as soon as we got word about the Heartbleed vulnerability?...
April 12, 2014 9:52 AM
As you may have noticed, the CloudFlare Heartbleed Challenge has been solved. The private key for the site cloudflarechallenge.com has been obtained by several authorized attackers via the Heartbleed exploit....
April 11, 2014 7:00 PM
Earlier today we announced the Heartbleed Challenge. We set up a nginx server with a vulnerable version of OpenSSL and challenged the community to steal its private key....
April 11, 2014 2:27 AM
Below is what we thought as of 12:27pm UTC. To verify our belief we crowd sourced the investigation. It turns out we were wrong. While it takes effort, it is possible to extract private SSL keys....
April 07, 2014 9:00 AM
Today a new vulnerability was announced in OpenSSL 1.0.1 that allows an attacker to reveal up to 64kB of memory to a connected client or server (CVE-2014-0160). We fixed this vulnerability last week before it was made public. ...
April 03, 2014 12:34 AM
This post is about a new feature we've been quietly rolling out over the last few months. Last week we began enabling it for everyone by default. ...
April 01, 2014 1:19 AM
A cornerstone of CloudFlare's infrastructure is our ability to serve DNS requests quickly and handle DNS attacks. To do both those things we wrote our own authoritative DNS server called RRDNS in Go. ...
February 23, 2014 11:00 AM
On Monday, February 10th, CloudFlare experienced a large DDoS attack, with nearly 400Gbps of NTP attack traffic hitting our network. ...
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 30, 2014 9:24 AM
Over the past few years, the CloudFlare blog has covered a great range of different topics, drilling down into the technology we use to both protect websites from attack, and optimise them so that they load faster for visitors....
December 31, 2013 6:30 PM
It's been a busy 2013 here at CloudFlare. By all external measures it was a terrific year. We grew page views, revenue and traffic across our network – all by more than 400%. We added terrific partners and high profile customers. ...
November 11, 2013 1:00 AM
Almost two years ago CloudFlare started working with Go. What started as an experiment on one network and concurrency heavy project has turned into full, production use of Go for multiple services....
August 27, 2013 6:15 PM
At 1:19pm (PDT) today, a researcher noticed that the New York Times' website wasn't loading. We know the New York Times tech team, so we sent an email to check in. A few minutes later, the CTO of the NYT called us back. ...
August 27, 2013 12:10 AM
About a year ago, we realized that CloudFlare's current DNS infrastructure had some challenges. We were using PowerDNS, an open source DNS server that is popular with hosting providers. ...
